RALEIGH, N.C.—Urban areas in the Southeastern United States will double in size by 2060 unless there are significant changes to land development, according to a new study by the Department of Interior’s Southeast Climate Science Center and North Carolina State University.
The predicted growth would come at the expense of agricultural and forest lands, creating an urban “megalopolis” stretching from Raleigh to Atlanta, which also raises a number of ecological concerns.
“If we continue to develop urban areas in the Southeast the way we have for the past 60 years, we can expect natural areas will become increasingly fragmented,” said Adam Terando, a research ecologist with the U.S. Geological Survey, adjunct assistant professor at NC State, and lead author of the study. “We could be looking at a seamless corridor of urban development running from Raleigh to Atlanta, and possibly as far as Birmingham, within the next 50 years.”
To understand how urban and natural environments could change, the researchers used NC State’s High Performance Computing services to simulate urban development between now and 2060 across the Southeastern United States.
Among the expected impacts of such expansive urban growth, the fragmentation of natural areas would significantly limit the mobility of wildlife, making it more difficult for them to find mates, raise young, find food and respond to environmental changes.
“This, in turn, increases the likelihood that we’ll see more conflicts between people and wildlife, such as the increasing interactions with bears we’re seeing in our suburban areas,” Terando said.
An increase in urbanization would also make urban heat islands—the warming of cities due to human activities and development—more common, favoring species that can take advantage of the hotter conditions in cities. For example, previous studies have found that insect pests – such as scale insects – thrive in urban environments.
“Unless we change course, over the next 50 years urbanization will have a more pronounced ecological impact in many non-coastal areas of the Southeast than climate change, said Jennifer Costanza, a research associate at NC State and a co-author of the study. “It’s impossible to predict precisely what the specific ecological outcomes would be, but so far, the projections are not good in terms of biodiversity and ecosystem health.”
This research emphasizes how decision makers involved in community planning will need a well-thought out strategy for future development, Costanza said.
“Given that urbanization poses significant challenges to this region, decision makers will need to begin serious, long-term discussions about economic development, ecological impacts and the value of non-urban spaces,” she added.
The paper, “The southern megalopolis: using the past to predict the future of urban sprawl in the Southeast U.S.,” is published in PLOS ONE. The paper was co-authored by Adam Terando, Alexa McKerrow and Jaime A. Collazo of the USGS; and Jennifer Costanza, Curtis Belyea and Rob Dunn of NC State. The work was supported by the DOI Southeast Climate Science Center based at NC State. The center provides scientific information to help natural resource managers respond effectively to climate change.
Caribou from the Central Arctic herd along the Sagavanirktok River in northern Alaska. (High resolution image)
ANCHORAGE, Alaska — Due to climate change, some communities in rural Alaska and the Yukon Territory of Canada may face a future with fewer caribou according to new research published by the U.S. Geological Survey and the University of Alaska, Fairbanks in the recent issue of PLoS ONE. Scientists examined the future effects of fires on winter habitats of caribou herds and determined that wildfires will reduce the amount of winter habitat for caribou, thus caribou may need to shift their wintering grounds
Warming temperatures will increase the flammability of lichen-producing boreal forests, which are important winter habitat for caribou herds. Caribou serve as nutritional as well as cultural sustenance for certain communities. Caribou avoid burned areas in winter and the changes in their distribution can persist across multiple generations of hunters. Those who rely on caribou in fire-prone areas may therefore have fewer available as climate change increases the number and sizes of fires in the boreal forests.
“We project that the Porcupine caribou herd will lose 21% of winter habitat to fire by the end of this century, with the majority of this loss driven by increased flammability in spruce forests in the Yukon," said Dr. Dave Gustine, a Research Wildlife Biologist with the USGS and lead author of the study.
The study examines how increasing temperatures will influence flammability of boreal forest areas used by the Central Arctic and Porcupine caribou herds during winter. Understanding possible changes to forest flammability allows forecasting of future winter distributions of caribou that will impact subsistence harvest and land, wildlife and fire management programs.
Climate change is global in scope and scale; however, its impacts are sometimes most visible in remote locations of the planet. Like climate change itself, migratory animals such as caribou do not recognize international geo-political borders and the research needed to study the relationship between climate change and animals crosses many countries.
The potential changes in caribou distribution will affect communities that have a cultural and nutritional reliance on caribou. Arctic Village, Alaska and Old Crow Yukon Territory, are within the traditional boreal forest winter range of the Porcupine herd, while hunters from the Alaskan villages of Fort Yukon, Venetie and Chalkyitsik, travel north each year to harvest animals from this herd.
“Fires were less numerous and smaller in tundra habitats compared to spruce habitats and given the more likely climate trajectory, we projected that the Porcupine caribou herd, which winters primarily in the boreal forest, could be expected to experience a greater reduction in lichen-producing winter habitats than the Central Arctic herd that wintered primarily in the arctic tundra,” said Dr. Todd Brinkman a co-author of the study and member of the Scenarios Network for Alaska and Arctic Planning at the University of Alaska, Fairbanks.
Future work by the USGS and collaborators will examine how fire-driven changes to winter habitat and temperature-driven changes to spring and summer forages will influence the habitats of caribou across the Alaskan Arctic.
This work is part of the USGS Changing Arctic Ecosystems Initiative.Simulation domain and winter ranges of the Central Arctic and Porcupine caribou herds, Alaska and Yukon. (High resolution image)
Insecticides similar to nicotine, known as neonicotinoids, were found commonly in streams throughout the Midwest, according to a new USGS study. This is the first broad-scale investigation of neonicotinoid insecticides in the Midwestern United States and one of the first conducted within the United States.
Effective in killing a broad range of insect pests, use of neonicotinoid insecticides has dramatically increased over the last decade across the United States, particularly in the Midwest. The use of clothianidin, one of the chemicals studied, on corn in Iowa alone has almost doubled between 2011 and 2013.
“Neonicotinoid insecticides are receiving increased attention by scientists as we explore the possible links between pesticides, nutrition, infectious disease, and other stress factors in the environment possibly associated with honeybee dieoffs.” said USGS scientist Kathryn Kuivila, the research team leader.
Neonicotinoid insecticides dissolve easily in water, but do not break down quickly in the environment. This means they are likely to be transported away in runoff from the fields where they were first applied to nearby surface water and groundwater bodies.
In all, nine rivers and streams, including the Mississippi and Missouri Rivers, were included in the study. The rivers studied drain most of Iowa, and parts of Minnesota, Montana, Nebraska, North Dakota, South Dakota, and Wisconsin. These states have the highest use of neonicotinoid insecticides in the Nation, and the chemicals were found in all nine rivers and streams.
Of the three most often found chemicals, clothianidin was the most commonly detected, showing up in 75 percent of the sites and at the highest concentration. Thiamethoxam was found at 47 percent of the sites, and imidacloprid was found at 23 percent. Two, acetamiprid and dinotefuran, were only found once, and the sixth, thiacloprid, was never detected.
Instead of being sprayed on growing or full-grown crops, neonicotinoids can be applied to the seed before planting. The use of treated seeds in the United States has increased to the point where most corn and soybeans planted in the United States have a seed treatment (i.e., coating), many of which include neonicotinoid insecticides.
“We noticed higher levels of these insecticides after rain storms during crop planting, which is similar to the spring flushing of herbicides that has been documented in Midwestern U.S. rivers and streams,” said USGS scientist Michelle Hladik, the report’s lead author. “In fact, the insecticides also were detected prior to their first use during the growing season, which indicates that they can persist from applications in prior years.”
One of the chemicals, imidacloprid, is known to be toxic to aquatic organisms at 10-100 nanograms per liter if the aquatic organisms are exposed to it for an extended period of time. Clothianidin and thiamethoxam behave similarly to imidacloprid, and are therefore anticipated to have similar effect levels. Maximum concentrations of clothianidin, thiamethoxam and imidacloprid measured in this study were 257, 185, and 42.7 nanograms per liter, respectively.
The U.S. Environmental Protection Agency has classified all detected neonicotinoids as not likely to be carcinogenic to humans.
The paper, “Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA” and has been published in Environmental Pollution. Learn more about the study and the long-term USGS effort to gather information on the environmental occurrence of new pesticides in different geographic, climatic, and use settings here. To learn more about USGS environmental health science, please visit the USGS Environmental Health website and sign up for our GeoHealth Newsletter.Locations of sites in Iowa sampled for neonicotinoids in 2013. Watersheds for the Mississippi River and Missouri River sites are shown in the inset.
Outdated and inconsistent elevation data cost lives and hinder prosperity across our Nation. Current and accurate 3D elevation data are essential to help communities cope with natural hazards, support infrastructure, ensure agricultural success, strengthen environmental decision making and bolster national security. Flood and landslide maps are just a few of the hundreds of applications benefiting from enhanced lidar data. A coordinated effort among Federal, State, local government and the private sector could meet our country’s needs for high-quality, 3D elevation data in just 8 years. Come learn how the USGS and its partners are working to assemble and apply better data to keep citizens safe and help America thrive.Speakers:
- Douglas Bausch – Region VIII Earthquake Program Manager and Senior Physical Scientist, Federal Emergency Management Agency
- John Dorman – Assistant State Emergency Management Director for Geospatial & Technology Management, North Carolina
- Jonathan Godt- Landslide Hazards Program Coordinator, U.S. Geological Survey
Emcee: Kevin Gallagher – Associate Director for Core Science Systems, USGS
Where: Rayburn House Office Building, Room 2325, Washington, D.C.
When: Friday, July 25, 2014 - 11:00 a.m.
Host: Refreshments provided courtesy of Management Association for Private Photogrammetric Surveyors (MAPPS)
High-resolution lidar image of Mount St. Helens, Washington.
The USGS, along with other federal, state, local and private agencies is establishing a new 3D Elevation Program (3DEP) designed to respond to the growing needs for three-dimensional mapping data of the United States. This coordinated partnership can help meet the country’s needs for high-quality, 3D elevation data.
Current and accurate 3D elevation data are essential to help communities cope with natural hazards and disasters such as floods and landslides, support infrastructure, ensure agricultural success, strengthen environmental decision-making and bolster national security.
The primary goal of the 3DEP partnership is to systematically collect 3D elevation data across the Nation, using lidar, a remote sensing detection system that works on the principle of radar, but uses light from a laser.
“We are excited about working with partners to apply the game-changing technology of lidar to benefit many critical needs of national importance,” said Kevin Gallagher, USGS Associate Director of Core Science Systems. “For example, FEMA and NOAA are some of our strongest partners because they rely on this type of data to significantly improve floodplain mapping and to better communicate flood risks to communities and citizens.”
The 3DEP initiative is based on the results of the National Enhanced Elevation Assessment that documented more than 600 business and science uses across 34 Federal agencies, all 50 States, selected local government and Tribal offices, and private and nonprofit organizations. The assessment also shows that 3DEP would provide more than $690 million annually in new benefits to government entities, the private sector, and citizens.
A recent White House fact sheet described how accessibility of accurate, high-quality 3D elevation data provides the foundation to the Administration’s overall plan to assist populations in the areas of flood risk management, water resource planning, mitigation of coastal erosion and storm surge impacts, and identification of landslide hazards.
The USGS will host a briefing on Capitol Hill on July 25 to further describe the importance, benefits and growing needs for 3D elevation data.
More information about 3DEP and state specific fact sheets is available online.A comparison of an air photo and a lidar image of an area along Secondary Road and Camp Creek, 12 miles north of John Day, OR. The lidar image allows identification of landslide activity that is otherwise masked by trees. (Photo courtesy of the Oregon Department of Geology and Mineral Industries).
The U.S. Geological Survey joins its many partners in other federal agencies, at universities, and in state and local governments in recognizing the importance of the Water Resources Research Act (WRRA) of 1964.
Signed into law 50 years ago by President Lyndon B. Johnson on July 17, 1964, the WRRA established a Water Resources Research Institute in each state and Puerto Rico. “Abundant, good water is essential to continued economic growth and progress,” said President Johnson at the time in a prepared statement. “The Congress has found that we have entered a period in which acute water shortages are hampering our industries, our agriculture, our recreation, and our individual health and happiness.”
“Water makes life on Earth possible, defines our landscape, and shapes our natural heritage. It is key to our continued prosperity,” observed Anne Castle, assistant secretary for water and science at the Department of the Interior. “The keen appreciation of the importance of water resources that was expressed by our nation’s leaders in 1964 appears even more visionary today as we are facing the challenges of population growth, increased demand, and climate change.”
The WRRA’s geographically distributed approach to water research and education, Johnson’s 1964 statement continued, “will enlist the intellectual power of universities and research institutes in a nationwide effort to conserve and utilize our water resources for the common benefit. The new centers will be concerned with municipal and regional, as well as with national water problems. Their ready accessibility to state and local officials will permit each problem to be attacked on an individual basis, the only way in which the complex characteristics of each water deficiency can be resolved.”
Subsequent amendments to the 1964 act broadened the list of National Institutes for Water Resources (NIWR) so that, by 1983, there were 54 institutes, one in each state, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, and Guam.
The Water Resources Research Institute Program originally authorized by WRRA in 1964 is a federal-state partnership that provides for competitive grants to be awarded for research projects focusing on the state and region. Each of the 54 institutes is charged with overseeing competent research that addresses water problems or expands the understanding of water and water-related phenomena. They are also responsible for aiding the entry of new research scientists into water resources fields, helping to train future water scientists and engineers, and transferring the results of sponsored research to water managers and the public.
“The water research partnerships fostered by the Water Resources Research Act are unparalleled,” said Sharon Megdal, Director of the University of Arizona Water Resources Research Center and president-elect of NIWR. “The network of Water Resources Research Institutes connects within states, across regions, and with USGS and other federal agencies to tackle the most pressing water resource challenges of our nation."
Fifty years later, the Water Resources Research Institutes, in partnership with the U.S. Geological Survey, continue to fulfill their roles assigned by Congress in 1964. They have produced path-breaking research, developed innovative information and technology transfer programs, and provided training to more than 25,000 students in their 50-year history.
- National Institutes for Water Resources (NIWR)
- Statement of President Lyndon B. Johnson on the occasion of the approval of the Water Resources Research Act of 1964, July 17, 1964.
- History of Water Resources Research Institutes program
This new global geologic map of Mars depicts the most thorough representation of the “Red Planet’s” surface. This map provides a framework for continued scientific investigation of Mars as the long-range target for human space exploration.(High resolution image)
A new global geologic map of Mars –the most thorough representation of the "Red Planet's" surface – has been published by the U.S. Geological Survey. This map provides a framework for continued scientific investigation of Mars as the long-range target for human space exploration.
The new map brings together observations and scientific findings from four orbiting spacecraft that have been acquiring data for more than 16 years. The result is an updated understanding of the geologic history of the surface of Mars – the solar system’s most Earth-like planet and the only other one in our Sun’s “habitable zone.” The new geologic map of Mars is available for download online.
For hundreds of years, geologic maps have helped drive scientific thought. This new global geologic map of Mars, as well as the recent global geologic maps of Jupiter’s moons Ganymede and Io, also illustrates the overall importance of geologic mapping as an essential tool for the exploration of the solar system.
"Spacecraft exploration of Mars over the past couple decades has greatly improved our understanding of what geologic materials, events and processes shaped its surface," said USGS scientist and lead author, Dr. Kenneth Tanaka. “The new geologic map brings this research together into a holistic context that helps to illuminate key relationships in space and time, providing information to generate and test new hypotheses.”
The USGS-led mapping effort reveals that the Martian surface is generally older than previously thought. Three times as much surface area dates to the first major geologic time period - the Early Noachian Epoch - than was previously mapped. This timeframe is the earliest part of the Noachian Period, which ranges from about 4.1 to about 3.7 billion years ago, and was characterized by high rates of meteorite impacts, widespread erosion of the Martian surface and the likely presence of abundant surface water.
The map also confirms previous work that suggests Mars had been geologically active until the present day. There is evidence that major changes in Mars’ global climate supported the temporary presence of surface water and near-surface groundwater and ice. These changes were likely responsible for many of the major shifts in the environments where Martian rocks were formed and subsequently eroded. This new map will serve as a key reference for the origin, age and historic change of geological materials anywhere on Mars.
"Findings from the map will enable researchers to evaluate potential landing sites for future Mars missions that may contribute to further understanding of the planet’s history," said USGS Acting Director Suzette Kimball. "The new Mars global geologic map will provide geologic context for regional and local scientific investigations for many years to come."
The Martian surface has been the subject of scientific observation since the 1600s, first by Earth-based telescopes, and later by fly-by missions and orbiting spacecraft. The Mariner 9 and Viking Orbiter missions produced the first planet-wide views of Mars’ surface, enabling publication of the first global geologic maps (in 1978 and 1986-87, respectively) of a planetary surface other than the Earth and the Moon. A new generation of sophisticated scientific instruments flown on the Mars Global Surveyor, Mars Odyssey, Mars Express and Mars Reconnaissance Orbiter spacecraft has provided diverse, high quality data sets that enable more sophisticated remapping of the global-scale geology of Mars.
The production of planetary cartographic products has been a focal point of research at the USGS Astrogeology Science Center since its inception in the early 1960s. USGS began producing planetary maps in support of the Apollo Moon landings, and continues to help establish a framework for integrating and comparing past and future studies of extraterrestrial surfaces. In many cases, these planetary geologic maps show that, despite the many differences between bodies in our solar system, there are many notable similarities that link the evolution and fate of our planetary system together.
The project was funded by NASA through its Planetary Geology and Geophysics Program.
The mission of the USGS Astrogeology Science Center is to serve the Nation, the international planetary science community, and the general public’s pursuit of new knowledge of our solar system. The Team’s vision is to be a national resource for the integration of planetary geosciences, cartography, and remote sensing. As explorers and surveyors, with a unique heritage of proven expertise and international leadership, USGS astrogeologists enable the ongoing successful investigation of the solar system for humankind. For more information, visit Astrogeology Science Center
ANCHORAGE, Alaska — Monitoring wildlife in the Arctic is difficult. Study areas are cold, barren and often inaccessible. For decades scientists have struggled to study animals, like polar bears, which live in these remote areas. Now researchers at the U.S. Geological Survey have begun testing a new, yet counterintuitive solution – rather then get close to the animals, monitor them from afar. Scientists have started using satellites to observe, count and track polar bears. USGS scientists and their Canadian collaborators have begun analyzing high-resolution satellite images from a part of the Canadian High Arctic to determine the feasibility of using satellites to study polar bear populations.
“We tested the use of satellite technology from DigitalGlobe to count polar bears by tasking the satellite to collect photos from an area where we were also conducting aerial surveys,” said Dr. Todd Atwood, research leader for the USGS Polar Bear Research Program. “We then analyzed the satellite and aerial survey data separately and found that the abundance estimates were remarkably similar.”
The study, which is led by former USGS scientist and current University of Minnesota researcher Dr. Seth Stapleton, is part of an ongoing effort to identify non-invasive technologies to better understand how polar bears respond to the loss of sea ice due to a warming climate. This study tries to determine the number of polar bears and where they reside on Rowley Island in Nunavut’s Foxe Basin during the ice-free summer. “We selected Rowley as our study site because bear density is high during summer and the flat terrain provides an ideal setting to evaluate the use of satellite imagery,” said Stapleton.
Traditionally, scientists study polar bears by capturing and tagging them or by conducting aerial surveys with low flying aircraft. While these methods provide a wealth of important information, they are disruptive to the animals and are often not possible when dealing with remote locations. “We think satellite technology has the potential to open vast, remote regions of the Arctic to regular monitoring. It has tremendous potential to aid the circumpolar management of polar bears,” said Stapleton.
The next steps in the research focus on testing the satellites’ ability to detect polar bear populations over larger areas, including sites along coastal Alaska. Using satellite imagery shows incredible promise and provides one more tool for those interested in preserving polar bear populations for future generations.
Several large rivers in the U.S. are less acidic now, due to decreasing acidic inputs, such as industrial waste, acid mine drainage, and atmospheric deposition.
A USGS study showed that alkalinity, a measurement of a river's capacity to neutralize acid inputs, has increased over the past 65 years in 14 of the 23 rivers assessed in the U.S.
Reduced acidity levels were especially common in rivers in the Northeast, such as the Delaware and Schuylkill Rivers; the Midwest, such as the Illinois and Ohio Rivers; and the Missouri River in the Great Plains.
"Long-term monitoring of streamflow and water-quality is essential to track how changes in climate and land use are impacting rivers and how riverine inputs may impact valuable commercial and recreational fisheries in estuaries across the Nation," said William Werkheiser, associate director for water. "Increasing alkalinity levels in large rivers across the country since 1945 is a positive trend."
Acidification of U.S. rivers in the early part of the 20th century was mostly associated with these acid inputs, which reduced the alkalinity of some rivers and caused them to become more acidic.
Increased alkalinity concentrations in large rivers draining a variety of climate and land-use types in this country are an indicator of recovery from acidification.
By looking at changes in multiple chemicals, scientists conducting the study found that the alkalinity increases were due to decreasing acidic inputs. The reasons for decreased acidic inputs have been diverse and include greater regulation of industrial emissions and waste treatment and increased use of agricultural lime.
"This study shows us that our cumulative management actions over the last half century have reduced acidity levels in U.S. rivers," said lead author Edward Stets, research ecologist at the USGS. "Acidification of rivers that empty into estuaries can adversely impact shell-bearing organisms such as oysters and crabs."
This study was published in the journal Science for the Total Environment. Information on USGS long-term water-quality monitoring can be accessed at the National Water-Quality Assessment Program page.
HAWAII ISLAND, Hawaiʻi — Scientists and technicians who work at volcano observatories in 11 countries are visiting the U.S. Geological Survey’s Hawaiian Volcano Observatory this week to learn techniques for monitoring active volcanoes.
The International Training Program in Volcano Hazards Monitoring is designed to assist scientists from other nations in attaining self-sufficiency in monitoring volcanoes and reducing the risks from eruptions. Field exercises on Kilauea and Mauna Loa Volcanoes allow students to observe and operate a variety of instruments, and classroom instruction at the Observatory provides students the opportunity to interpret data, as well as plan a monitoring network for their home volcanoes. U.S. scientists are providing training on monitoring methods, data analysis and interpretation, and volcanic hazard assessment, and participants are taught about the use and maintenance of volcano monitoring instruments. Participants learn about forecasting events, responding rapidly during volcanic crises, and how to work with governing officials and the news media to save lives and property.
Organized by the Center for the Study of Active Volcanoes at the University of Hawaiʻi at Hilo, with support from the University of Hawaiʻi at Manoa and the joint USGS-U.S. Agency for International Development Volcano Disaster Assistance Program, the annual program has been training foreign scientists for 24 years. This year’s class includes 16 volcano scientists from Chile, Colombia Costa Rica, Democratic Republic of Congo, Indonesia, Italy, Papua New Guinea, Peru, Philippines, Saudi Arabia, and South Korea.
“Hawaiian volcanoes offer an excellent teaching opportunity because our volcanoes are relatively accessible, they're active, and USGS staff scientists can teach while actually monitoring volcanic activity," said the USGS’s HVO Scientist-in-Charge, Jim Kauahikaua. “The small investment we make in training international scientists now goes a long way toward mitigating large volcanic disasters in the future.”
“Providing training in volcano hazards assessment and monitoring is by far the most cost effective strategy for reducing losses and saving lives for those developing nations exposed to high volcanic hazards risks,” said CSAV Director Donald Thomas. “The goal of our course is to provide our trainees with an understanding of the technologies that can be applied to an assessment of volcanic threats as well as how to interface with their respective communities to increase awareness of how to respond to those threats.”
“The training program directly benefits the United States, through international exchange of knowledge concerning volcanic eruptions, and it serves as an important element in our country’s humanitarian assistance and science diplomacy programs around the world,” said the USGS’s VDAP Chief, John Pallister.
The international participants are learning to use both traditional geological tools and the latest technology. To anticipate the future behavior of a volcano, basic geologic mapping brings an understanding of what a volcano is capable of doing, how frequently it has erupted in the past, and what kind of rocks, and ash it produces. Using Geographic Information Systems, the students learn to predict lava flow paths, conduct a vulnerability assessment, and tabulate the predicted costs associated with the damage from a lava flow. Participants are trained in the emerging field of infrasound monitoring, which is critical for rapidly detecting volcanic explosions and/or rift zone eruptions, as well as basic seismological fundamentals, and a survey of pre-eruptive seismic swarms at various volcanoes around the world. Monitoring and modeling deformation of a volcano focuses on different techniques from traditional leveling methods to GPS and satellite-based radar.
Providing critical training to international scientists began at HVO, leading to the creation of CSAV to continue the legacy. Since 1990, almost 200 scientists and civil workers from 29 countries have received training in volcano monitoring methods through CSAV. USGS’s HVO continues to provide instructors and field experiences for the courses, and VDAP has a long-term partnership with CSAV, providing instructors and co-sponsoring participants from countries around the world.
Carbon Storage in U.S. Eastern Ecosystems Helps Counter Greenhouse Gas Emissions Contributing to Climate Change
WASHINGTON, D.C. – On the one-year anniversary of President Obama’s Climate Action Plan, Secretary of the Interior Sally Jewell today released a new report showing that forests, wetlands and farms in the eastern United States naturally store 300 million tons of carbon a year (1,100 million tons of CO2 equivalent), which is nearly 15 percent of the greenhouse gas emissions EPA estimates the country emits each year or an amount that exceeds and offsets yearly U.S. car emissions.
In conjunction with the national assessment, today USGS also released a new web tool, which allows users to see the land and water carbon storage and change in their ecosystems between 2005 and 2050 in the lower 48 states. This tool was called for in the President’s Climate Action Plan.
“Today we are taking another step forward in our ongoing effort to bring sound science to bear as we seek to tackle a central challenge of the 21st century – a changing climate,” said Secretary Jewell. “This landmark study by the U.S. Geological Survey provides yet another reason for being good stewards of our natural landscapes, as ecosystems play a critical role in removing harmful carbon dioxide from the atmosphere that contributes to climate change.”
With today’s report on the eastern United States, the U.S. Geological Survey (USGS) has completed the national biological carbon assessment for ecosystems in the lower 48 states – a national inventory of the capacity of land-based and aquatic ecosystems to naturally store, or sequester, carbon, which was called for by Congress in 2007.
Together, the ecosystems across the lower 48 states sequester about 474 million tons of carbon a year (1,738 million tons of CO2 equivalent), comparable to counter-balancing nearly two years of U.S. car emissions, or more than 20 percent of the greenhouse gas emissions EPA estimates the country emits each year.
The assessment shows that the East stores more carbon than all of the rest of the lower 48 states combined even though it has fewer than 40 percent of the land base. Under some scenarios, USGS scientists found that the rate of sequestration for the lower 48 states is projected to decline by more than 25 percent by 2050, due to disturbances such as wildfires, urban development and increased demand for timber products.
“What this means for the future is that ecosystems could store less carbon each year,” said USGS Acting Director Suzette Kimball. “Biological sequestration may not be able to offset greenhouse gas emissions nearly as effectively when these ecosystems are impaired.”
Forests accounted for more than 80 percent of the estimated carbon sequestered in the East annually, confirming the critical role of forests highlighted in the Administration’s climate action initiative.
USGS scientists have been building the national assessment since a 2007 congressional mandate in the Energy Independence and Security Act. The first report, on the Great Plains, was released in 2011, the second report, on the Western United States, was released in 2012. Reports on Alaska and Hawaii are expected to be completed in 2015.
Biological carbon storage – also known as carbon sequestration – is the process by which carbon dioxide (CO2) is removed from the atmosphere and stored as carbon in vegetation, soils and sediment. The USGS inventory estimates the ability of different ecosystems to store carbon now and in the future, providing vital information for land-use and land-management decisions. Management of carbon stored in our ecosystems and agricultural areas is relevant both for mitigation of climate change and for adaptation to such changes.
The area studied for the eastern U.S. carbon assessment was defined by similarities in ecology and land cover. The study area extends eastward from the western edge of the Great Lakes and the Mississippi floodplains, across the Appalachian Mountains, to the coastal plains of the Atlantic Ocean and the Gulf of Mexico. The major ecosystems USGS researchers evaluated were terrestrial (forests, wetlands, agricultural lands, shrublands and grasslands), and aquatic (rivers, lakes, estuaries and coastal waters).
MAJOR FINDINGS ON BIOLOGICAL CARBON STORAGE
IN THE EASTERN UNITED STATES
U.S. Geological Survey, June 2014
Major Findings: Current Eastern Carbon Storage (between 2001 and 2005)
● The eastern U.S., with just under 40 percent of the land in the lower 48 states, stores more carbon than the rest of the conterminous United States.
● Forests, which occupy about half the land in the East, accounted for more than 80 percent of the region’s estimated carbon sequestered annually. They are the largest carbon-storing pools, and have the highest rate of sequestration of the different ecosystem types.
● Wetlands, including coastal ones, which comprise only about 9 percent of the land cover in the region studied, account for nearly 13 percent of the region’s estimated annual carbon storage. They also have the second-highest rate of sequestration of all ecosystem types. Nutrients and sediments in rivers and streams flowing from terrestrial environments contribute significantly to the storage of carbon in eastern coastal sediments and deep ocean waters.
● In contrast, carbon dioxide is emitted from the surface of inland water bodies (rivers, streams, lakes and reservoirs), equal to about 18 percent of the recent annual carbon sequestration rate of terrestrial ecosystems in the East.
● Agricultural areas cover about 31 percent of the East, and account for only 4 percent of the region’s annually sequestered carbon.
● Grasslands and shrublands, as well as other types of land, contained just 1.1 percent or less of the region’s carbon.
Major Findings: Projected Changes in Eastern Carbon by 2050
● The eastern United States is projected to continue to be a carbon sink (absorbs more carbon than it emits) through 2050, increasing the carbon stored by as much as 37 percent. However, the rate of sequestration is projected to slow by up to 20 percent, primarily because of decreases in the amount of forest cover.
● Land use is projected to continue to change in the future; landscape changes are projected to be between 17 and 23 percent by 2050 under different scenarios. These changes, primarily the result of demands for forest products, urban development and agriculture, could affect the future potential storage capacity of the region’s ecosystems and other lands because future carbon stocks are inextricably linked to land-use practices and changes.
● The area projected to experience the most change – about 30 percent -- is the southeastern United States, primarily because of conversion of land from forests to agricultural and urban land.
● By 2050, coastal carbon storage could increase by 18 to 56 percent. Land-use changes could increase nutrient and sediment flow from urban and agricultural lands (which presents a separate challenge), but this would also increase the amount of carbon stored in coastal areas.
For more information on the assessment, visit HERE. Watch a short video on the assessment HERE.
Visit the web tool HERE. Watch a tutorial on how to use the web tool HERE.
Read some FAQs on the Eastern Carbon Report
NOTE TO REPORTERS: A step-by-step video demonstration on using the tool is available online.
RESTON, Va.— Announced on the one-year anniversary of President Obama’s Climate Action Plan (310 KB PDF; page 16 - Providing a Toolkit for Climage Resilience), a new “Land Carbon Viewer” allows users to see the land carbon storage and change in their ecosystems between 2005 and 2050 in the lower 48 states.
The Land Carbon Viewer Website, developed by U.S. Geological Survey in collaboration with the University of California-Berkeley, is based on the national biological carbon assessment for ecosystems, completing the carbon inventory for the lower 48.
The new Land Carbon Viewer will give the public access to the national inventory of the capacity of land-based ecosystems to naturally store, or sequester, carbon. Researchers used the data on ecosystem carbon storage, or sequestration, in the national assessment to build maps, graphs and text for the land carbon viewer.
The resulting products will help land and resource planners and policy makers easily see how much carbon is sequestered in the different land types in their regions now, and up to 2050, under various land-use and climate scenarios. The tool also allows users to download data in their particular areas or ecosystems of interest.
“The new Land Carbon Viewer demonstrates how the Interior Department can significantly contribute to the U.S. effort to establish a national carbon inventory and tracking system as part of the President’s Climate Action Plan,” said Suzette Kimball, acting USGS director. “USGS is committed to taking the next step, which is to make this approach useful for specific sites and situations. Incorporating carbon science directly into management planning is critical to ensure sound land use and land management decisions that will affect future generations.”
The USGS mapped how much carbon is sequestered in ecosystems using streamgage, soil and natural-resource inventory data, remote sensing techniques, and computer models. Based on the U.S Environmental Protection Agency’s ecoregion map, the USGS Land Carbon Viewer shows the lower 48 divided into 16 ecoregions defined by similarities in ecology and land cover. The ecosystems examined are terrestrial (forests, wetlands, agricultural lands, shrublands and grasslands), and aquatic (rivers, lakes, estuaries and coastal waters).
For example, the Southeastern USA Plains Ecoregion is the largest ecoregion in the eastern United States, and users can explore the baseline (2001-2005) and future (2006-2050) carbon storage in different kinds of ecosystems using three different IPCC carbon emission scenarios combined with economic models:
● Moderate population growth, high economic growth, rapid technical innovation and balanced energy use,
● Continuous population growth, uneven economic and technical growth, and carbon emissions triple through the 21st century, and
● High economic growth, a population that peaks by mid-century and then declines, a rapid shift toward clean energy technologies, and a CO2 concentration that approximately doubles by 2100.
“The new USGS Land Carbon Viewer allows decision-makers to view and explore various ecoregions, and download data over their area of interest,” said Suzette Kimball. “The resulting products will help land and resource planners and policy makers easily see how much carbon is sequestered in the different land types in their regions now, and up to 2050, under various land-use and climate scenarios.”
Among the many benefits of ecosystems and farmlands to society, these areas also store, or sequester, biological carbon. Biological carbon sequestration is the process by which carbon dioxide (CO2) is removed from the atmosphere and stored as carbon in vegetation, soils and sediment. Such storage reduces the amount of carbon dioxide in the atmosphere.
Since a 2007 congressional mandate in the Energy Independence and Security Act, USGS scientists have been building a national inventory of the capacity of land-based ecosystems to store carbon naturally, information vital for science-based land use and land management decisions are expected to be completed in 2015.
NOAA, Partners Predict an Average 'Dead Zone' for Gulf of Mexico; Slightly Above-average Hypoxia in Chesapeake Bay
NOTE: Link to the Maryland Department of Natural Resourses was changed in the 10th paragraph. (6/25/14)
Scientists are expecting an average, but still large, hypoxic or "dead zone" in the Gulf of Mexico this year, and slightly above-average hypoxia in the Chesapeake Bay.
NOAA-supported modeling is forecasting this year's Gulf of Mexico hypoxic zone to cover an area ranging from about 4,633 to 5,708 square miles (12,000 to 14,785 square kilometers) or about the size of the state of Connecticut.
While close to averages since the late 1990s, these hypoxic zones are many times larger than what research has shown them to be prior to the significant human influences that greatly expanded their sizes and effects.
The Gulf of Mexico prediction is based on models developed by NOAA-sponsored modeling teams and individual researchers at the University of Michigan, Louisiana State University, Louisiana Universities Marine Consortium, Virginia Institute of Marine Sciences/College of William and Mary, Texas A&M University, and the U.S. Geological Survey, and relies on nutrient loading estimates from the USGS. The models also account for the influence of variable weather and oceanographic conditions, and predict that these can affect the dead zone area by as much as 38 percent.
A second NOAA-funded forecast, for the Chesapeake Bay, predicts a slightly larger than average dead zone in the nation's largest estuary. The forecast predicts a mid-summer low-oxygen hypoxic zone of 1.97 cubic miles, an early-summer oxygen-free anoxic zone of 0.51 cubic miles, with the late-summer oxygen-free anoxic area predicted to be 0.32 cubic miles. Because of the shallow nature of large areas of the estuary the focus is on water volume or cubic miles, instead of square mileage as used in the Gulf.
The Chesapeake Bay prediction is based on models developed by NOAA-sponsored researchers at the University of Maryland Center for Environmental Science, University of Michigan, and again relies on nutrient loading estimates from USGS.
The dead zone in the Gulf of Mexico affects nationally important commercial and recreational fisheries and threatens the region's economy. The Chesapeake Bay dead zones, which have been highly variable in recent years, threaten a multi-year effort to restore the water and habitat quality to enhance its production of crabs, oysters, and other important fisheries.
Hypoxic (very low oxygen) and anoxic (no oxygen) zones are caused by excessive nutrient pollution, primarily from human activities such as agriculture and wastewater, which results in insufficient oxygen to support most marine life and habitats in near-bottom waters. Aspects of weather, including wind speed, wind direction, precipitation and temperature, also affect the size of dead zones.
"We are making progress at reducing the pollution in our nation's waters that leads to 'dead zones,' but there is more work to be done," said Kathryn D. Sullivan, Ph.D., under secretary of commerce for oceans and atmosphere and NOAA administrator. "These ecological forecasts are good examples of the critical environmental intelligence products and tools that NOAA provides to interagency management bodies such as the Chesapeake Bay Program and Gulf Hypoxia Task Force. With this information, we can work collectively on ways to reduce pollution and protect our marine environments for future generations."
Later this year, researchers will measure oxygen levels in both bodies of water. The confirmed size of the 2014 Gulf hypoxic zone will be released in late July or early August, following a mid-July monitoring survey led by the Louisiana Universities Marine Consortium. The final measurement in the Chesapeake will come in October following surveys by the Chesapeake Bay Program's partners from the Maryland Department of Natural Resources and the Virginia Department of Environmental Quality.
USGS nutrient-loading estimates for the Mississippi River and Chesapeake Bay are used in the hypoxia forecasts for the Gulf and Chesapeake Bay. The Chesapeake data are funded with a cooperative agreement between USGS and the Maryland Department of Natural Resources. USGS also operates more than 65 real-time nitrate sensors in these two watersheds to track how nutrient conditions are changing over time.
For the Gulf of Mexico USGS estimates that 101,000 metric tons of nitrate flowed down the Mississippi River into the northern gulf in May 2014, which is less than the 182,000 metric tons in last May when stream flows were above average. In the Chesapeake Bay USGS estimates that 44,000 metric tons of nitrogen entered the bay from the Susquehanna and Potomac rivers between January and May of 2014, which is higher than the 36,600 metric tons delivered to the Bay during the same period in 2013.
"The USGS continues to conduct long-term nutrient monitoring and modeling" said William Werkheiser, USGS associate director for water. "This effort is key to tracking how nutrient conditions are changing in response to floods and droughts and nutrient management actions."
The research programs supporting this work are authorized under the Harmful Algal Bloom and Hypoxia Research and Control Act, known as HABHRCA, which was recently amended and reauthorized earlier this month through 2018.
Heidi Koontz ( Phone: 303-202-4763 );
A recent study conducted by scientists from the U.S. Geological Survey and published in the Journal of Geophysical Research – Biogeosciences found that a combination of climate and human activities (diversion and reservoirs) controls the movement of carbon in two large western river basins, the Colorado and the Missouri Rivers.
Rivers move large amounts of carbon downstream to the oceans. Developing a better understanding of the factors that control the transport of carbon in rivers is an important component of global carbon cycling research.
The study is a product of the USGS John Wesley Powell Center for Analysis and Synthesis and the USGS Land Carbon program.
Different downstream patterns were found between the two river systems. The amount of carbon steadily increased down the Missouri River from headwaters to its confluence with the Mississippi River, but decreased in the lower Colorado River. The differences were attributed to less precipitation, greater evaporation, and the diversion of water for human activities on the Colorado River.
For upstream/headwater sites on both rivers, carbon fluxes varied along with seasonal precipitation and temperature changes. There was also greater variability in the amount of carbon at upstream sites, likely because of seasonal inputs of organic material to the rivers. Reservoirs disrupted the connection between the watershed and the river, causing carbon amounts downstream of dams to be less variable in time and less responsive to seasonal temperature and precipitation changes.
The study presents estimates of changes in the amount of carbon moving down the Colorado and Missouri Rivers and provides new insights into aquatic carbon cycling in arid and semi-arid regions of the central and western U.S, where freshwater carbon cycling studies have been less common. This work is part of an ongoing effort to directly address the importance of freshwater ecosystems in the context of the broader carbon cycle. In the future, changing hydrology and warming temperatures will increase the importance of reservoirs in carbon cycling, and may lead to an increase in Greenhouse Gas Emissions that contribute to global warming, but may also increase the amount of carbon buried in sediments.
The 2006 prohibition on the use of coal-tar-based pavement sealants in Austin, Texas, has resulted in a substantial reduction in polycyclic aromatic hydrocarbons (PAHs), according to a new study by the U.S. Geological Survey.
Pavement sealant is a black, shiny substance sprayed or painted on the asphalt pavement of parking lots, driveways and playgrounds to increase the longevity of the underlying asphalt pavement and enhance its appearance. Pavement sealants that contain coal tar have extremely high levels of PAHs compared to asphalt-based pavement sealants and other urban PAH sources such as vehicle emissions, used motor oil and tire particles. PAHs are an environmental health concern because several are probable human carcinogens and they are toxic to fish and other aquatic life.
In 2006, Austin became the first jurisdiction in the United States to ban the use of coal-tar sealants. USGS scientists evaluated the effect of the ban on PAH concentrations in lake sediments by analyzing trends in PAHs in sediment cores and surficial bottom sediments collected in 1998, 2000, 2001, 2012 and 2014 from Lady Bird Lake, a reservoir on the Colorado River in central Austin. Average PAH concentrations in the lower part of the lake have declined 58 percent since the ban, reversing a 40-year upward trend. The full study, reported in the scientific journal Environmental Science and Technology, is available online.
“Identifying contaminant trends in water and sediment is key to evaluating the effect of environmental regulations, and provides vital information for resource managers and the public,” said lead USGS scientist Dr. Peter Van Metre.
Results of the USGS study support the conclusions of previous studies that coal-tar sealants are a major source of PAHs to Lady Bird Lake and to other lakes in commercial and residential settings. A sediment core collected by the USGS from Lady Bird Lake in 1998 was part of a study of 40 lakes from across the United States that used chemical fingerprinting to determine that coal-tar sealants were, on average, the largest contributor of PAH to the lakes studied. Chemical fingerprinting of sediment collected for the new study indicates that coal-tar-based sealant continues to be the largest source of PAHs to Lady Bird Lake sediment, implying that PAH concentrations should continue to decrease as existing coal-tar-sealant stocks are depleted.
To learn more, visit the USGS website on PAHs and sealcoat.
Concentrations of dissolved solids, a measure of the salt content in water, are elevated in many of the Nations streams as a result of human activities, according to a new USGS study. Excessive dissolved-solids concentrations in water can have adverse effects on the environment and on agricultural, domestic, municipal, and industrial water users.
Results from this study provide a nation-wide picture of where dissolved-solids concentrations are likely to be of concern, as well as the sources leading to such conditions.
“This study provides the most comprehensive national-scale assessment to date of dissolved solids in our streams,” said William Werkheiser, USGS Associate Director for Water. “For years we have known that activities, such as road de-icing, irrigation, and other activities in urban and agricultural lands increase the dissolved solids concentrations above natural levels caused by rock weathering, and now we have improved science-based information on the primary sources of dissolved-solids in the nation’s streams.”
The highest concentrations are found in streams in an area that extends from west Texas to North Dakota. Widespread occurrences of moderate concentrations are found in streams extending in an arc from eastern Texas to northern Minnesota to eastern Ohio. Low concentrations are found in many states along the Atlantic coast and in the Pacific Northwest.
The total amount of dissolved solids delivered to all of the Nation’s streams is about 270 million metric tons annually, of which about 71% comes from weathering of rocks and soil, 14% comes from application of road deicers, 10% comes from activities on agricultural lands, and 5% comes from activities on urban lands.
All water naturally contains dissolved solids as a result of weathering processes in rocks and soils. Some amount of dissolved solids is necessary for agricultural, domestic, and industrial water uses and for plant and animal growth, and many of the major ions are essential to life and provide vital nutritional functions. Elevated concentrations, however, can cause environmental and economic damages. For instance, estimated damages related to excess salinity in the Colorado River Basin exceed $330 million annually.
“This study applied statistical modeling to understand the sources and transport processes leading to dissolved-solids concentrations observed in field measurements at over 2,500 water-quality monitoring sites across the Nation,” said David Anning, USGS lead scientist for the study. “This new information was then used to estimate contributions from different dissolved-solids sources and the resulting concentrations in unmonitored streams, thereby providing a complete assessment of the Nation’s streams.”
The study determined that in about 13 percent of the Nation’s streams, concentrations of dissolved solids likely exceed 500 mg/L, which is the U.S. Environmental Protection Agency’s secondary, non-enforceable drinking water standard. Many of these streams are found in a north-south oriented band stretching from west Texas to North Dakota.
While this standard provides a benchmark for evaluating predicted concentrations in the context of drinking-water supplies, it should be noted that it only applies to drinking water actually served to customers by water utilities.
An online, interactive decision support system provides easy access to the national-scale model describing how streams receive and transport dissolved solids from human sources and weathering of geologic materials. The decision support system can used to evaluate combinations of reduction scenarios that target one or multiple sources and see the change in the amount of dissolved solids transported downstream waters.
The dissolved-solids model was developed by the USGS National Water-Quality Assessment Program, which provides information about water-quality conditions and how natural features and human activities affect those conditions. Information on modeling applications, data, and documentation can be accessed online.
ANCHORAGE— The first "point of view" video from a polar bear on Arctic sea ice has just become available courtesy of the U.S. Geological Survey. Scientists applied video camera collars to four female polar bears on the sea ice north of Prudhoe Bay, Alaska this past April and are releasing the first clips of footage that provide unique insight into the daily lives of the bears.
"We deployed two video cameras in 2013, but did not get any footage because the batteries weren’t able to handle the Arctic temperatures,” said Dr. Todd Atwood, research leader for the USGS Polar Bear Research Program. “We used different cameras this year, and we are thrilled to see that the new cameras worked."
The video collars were deployed as part of a new study to understand how polar bears are responding to sea ice loss from climate warming. The study, led by USGS research biologist and University of California Santa Cruz PhD student Anthony Pagano, is taking a close look at polar bear behaviors and energetics.
Scientists with the USGS have been studying polar bear movement and habitat use for decades using radio and satellite telemetry, mostly used to determine a polar bear’s location. New video collars allow scientists to link the location data from the collar with the actual behavior recorded by the cameras.
Although these collars were only on for about 8-10 days, scientists can start to understand the activity patterns of polar bears, for example how often they eat, hunt, rest, walk, and swim and how these behaviors may be affected by sea ice conditions and other variables. Ultimately, this information will help scientists examine the energetic rates and nutritional demands of these animals and the potential effects of declining sea ice conditions,” said Pagano.
This ongoing research is part of the USGS Changing Arctic Ecosystems Initiative. This research is also relevant to the U.S. Fish and Wildlife Service Polar Bear Recovery Team of which the USGS is a member. The team is drafting the Polar Bear Conservation Management Plan, which will meet requirements of both the Endangered Species Act and Marine Mammal Protection Act. The required plan, when finalized, will guide activities for polar bear conservation in response to the 2008 determination that the polar bear is a threatened species due to the ongoing loss of sea ice habitat from global climate-change.
Just in time to explore the great outdoors this summer, newly designed US Topo maps covering Montana are now available online for free download.
US Topo maps now have a crisper, cleaner design - enhancing readability of maps for online and printed use. Map symbols are easier to read over the digital aerial photograph layer whether the imagery is turned on or off. Improvements to symbol definitions (color, line thickness, line symbols, area fills), layer order, and annotation fonts are additional features of this latest release. The maps also have transparency for some features and layers to increase visibility of multiple competing layers.
This new design was launched earlier this year and is now part of the new US Topo quadrangles for Montana (2,913 maps) replacing the first edition US Topo maps for the state.
“Users in Montana will appreciate improvements in the US Topo product, including the availability of Forest Service trails, and vegetation cover (green tint), as well as updated structures data through a partnership with the State,” said Lance Clampitt, USGS Geospatial Liaison for Montana. “It is very exciting to see the cooperative work between the State of Montana, Montana State Library (MSL) and the USGS in using the best available source data to make the US Topo maps.”
The MSL is using the USGS mapping and crowd-sourcing program, known as The National Map Corps to collect and update new structures data for US Topo map revisions. “This new product will be beneficial to the citizens of Montana as well as numerous recreational users that visit the state each year,” Clampitt continued. “The added capability to use the US Topo maps on mobile devices is also very exciting for our outdoor enthusiast. We look forward to seeing these improvements on the 2014 release for the Treasure State.”
US Topo maps are updated every three years. The initial round of the 48 conterminous states coverage was completed in September of 2012. Hawaii and Puerto Rico maps have recently been added. More than 700 new US Topo maps for Alaska have been added to the USGS Map Locator & Downloader, but will take several years to complete.
Re-design enhancements and new features:
- Crisper, cleaner design improves online and printed readability while retaining the look and feel of traditional USGS topographic maps
- New functional road classification schema has been applied
- A slight screening (transparency) has been applied to some features to enhance visibility of multiple competing layers
- Updated free fonts that support diacritics
- New PDF Legend attachment
- Metadata formatted to support multiple browsers
- New shaded relief layer for enhanced view of the terrain
- Military installation boundaries, post offices and cemeteries
- The railroad dataset is much more complete from a new contractor
The previous versions of US Topo maps for Montana, published in 2011, can still be downloaded from USGS web sites. Also, scanned images of the entire USGS map library of topographic maps from the period 1884-2006 can be downloaded from the USGS Historical Topographic Map Collection. These scanned images of legacy paper maps are available for free download from The National Map and the USGS Map Locator & Downloader website.
US Topo maps are created from geographic datasets in The National Map, and deliver visible content such as high-resolution aerial photography, which was not available on older paper-based topographic maps. The new US Topo maps provide modern technical advantages that support wider and faster public distribution and on-screen geographic analysis tools for users. The new digital electronic topographic maps are delivered in GeoPDF ® image software format and may be viewed using Adobe Reader, available as a no cost download.
For more information, go to: http://nationalmap.gov/ustopo/2014 US Topo map of the Dewey, Montana area with image layer turned on (1:24,000 scale). (high resolution image 1.1 MB) Scan of 1893 USGS topographic map of the Dewey, Montana area from the USGS Historical Topographic Map Collection (1:250,000 scale). (high resolution image 1.9 MB)
Scientists working to understand the devastating bat disease known as white-nose syndrome (WNS) now have a new, non-lethal tool to identify bats with WNS lesions —ultraviolet, or UV, light.
If long-wave UV light is directed at the wings of bats with white-nose syndrome, it produces a distinctive orange-yellow fluorescence. This orange-yellow glow corresponds directly with microscopic skin lesions that are the current “gold standard” for diagnosing white-nose syndrome in bats.
“When we first saw this fluorescence of a bat wing in a cave, we knew we were on to something,” said Greg Turner from Pennsylvania Game Commission, who has been using this technique since 2010. “It was difficult to have to euthanize bats to diagnose WNS when the disease itself was killing so many. This was a way to get a good indication of which bats were infected and take a small biopsy for testing rather than sacrifice the whole bat.”
Millions of bats in the United States have died from the fungal disease called White nose syndrome which is caused by the fungus Pseudogymnoascus (Geomyces) destructans (Pd). White-nose syndrome was first seen in New York during the winter of 2006. Since then, the disease has spread to 25 US states and 5 Canadian provinces.
A significant problem in studying WNS has been the unreliability of visual onsite inspection when checking for WNS in bats during hibernation; the only way to confirm presence of disease was to euthanize the bats and send them back to a laboratory for testing.
“Ultraviolet light was first used in 1925 to look for ringworm fungal infections in humans,” said Carol Meteyer, USGS scientist and one of the lead authors on the paper. “The fact that this technique could be transferred to bats and have such remarkable precision for indicating lesions positive for Pd invasion is very exciting.”
To test the UV light’s effectiveness, bats with and without white-nose syndrome in North America were tested by the U.S. Geological Survey’s National Wildlife Health Center, first using UV light, then using traditional histological techniques to verify the UV light’s accuracy.
In the USGS lab testing, 98.8 percent of bats with the orange-yellow fluorescence tested positive for white-nose syndrome, whereas 100 percent of those that did not fluoresce tested negative for the disease. Targeted biopsies showed that pinpoint areas of fluorescence coincided with the microscopic wing lesions that are characteristic for WNS.
Researchers in the Czech Republic then tested the UV light-assisted biopsy technique in the field, using it to collect small samples from areas of bat wing that fluoresced under UV light. In this study, 95.5 percent of wing biopsies that targeted areas of fluorescence were microscopically positive for WNS lesions, while again 100 percent of bats that did not fluoresce were negative for WNS.
Combining research from two continents demonstrates that UV diagnostics might be applicable worldwide with great sensitivity and specificity in detecting WNS.
“Moreover, the technique hurts the animal minimally and bats fly away after providing data for research,” said Natalia Martinkova from the Academy of Sciences of the Czech Republic. “This makes UV fluorescence an ideal tool for studying endangered species.”
This effort included partners in the USFWS, state and federal biologists, the Czech Science Foundation, and the National Speleological Society of the USA.
This research article, “Nonlethal Screening of Bat-wing Skin with the Use of Ultraviolet Fluorescence to Detect Lesions Indicative of White-Nose Syndrome,” was recently published in the Journal of Wildlife Diseases. More information may be found on USGS research on white-nose syndrome here.
WOODS HOLE, Mass. —Flooding in coastal areas bordering Great South Bay, N.Y. and Barnegat Bay, N.J. caused by winter storms that occurred following Hurricane Sandy was not influenced by changes Sandy made to barrier islands or other bay features, according to a new U.S. Geological Survey study.
The study of Barnegat Bay and Great South Bay looked at data from November 2012 to October 2013, when winter storms brought water levels in these bays to among the 20 highest storm water levels reached from October 2007- October 2013.
“The frequent and extreme high-water levels caused by storms in these two bays in the months after Hurricane Sandy led to perceptions the mainland was more vulnerable to flooding,” said USGS oceanographer and coauthor of the study Neil Ganju. “This study shows that changes to bay features caused by Hurricane Sandy did not influence these post Sandy storm water levels.”
Hurricane Sandy caused extreme floods along portions of the northeast coast of the U.S. and cut new inlets across barrier islands in New Jersey and New York. Scientists investigated whether Hurricane Sandy had in some way reduced the protection provided by the barrier islands and the bays, leaving the mainland more vulnerable to flooding.
The study compared water level measurements made at stations within Great South Bay and Barnegat Bay to ocean water levels before and after Hurricane Sandy. Both are back barrier bays -- bodies of water behind barrier islands and connected to the ocean through one or more inlets.
“Changes in water levels in the back-barrier bays are primarily caused by ocean water levels driving water into or out of the bays through inlets,” said USGS oceanographer and lead author of the study Alfredo Aretxabaleta. “The study showed that most of the ocean water level fluctuations caused by storms make their way into the bays, while only a fraction of tidal fluctuations do.”
The results showed that alterations to the barrier, inlet, and bay systems caused by Hurricane Sandy did not influence the high water levels caused by storms from November 2012 to October 2013. None of these post-Sandy storms opened new inlets or caused overtopping of the protective dunes and barrier beach systems. Both before and after Sandy, about 80 percent of storm surge—a temporary rise in water level caused by an offshore storm’s winds or low pressure—made its way into the back barrier bays, whereas only about 20 percent of the tidal fluctuations do. This suggests that whether the same storm occurred before or after Hurricane Sandy, the water level in the bays would be the same.
“While the existing barrier island and inlet system shields the mainland to a great extent from the daily tides, most of the storm surge, and all long-term changes in water level, such as those resulting from sea level rise, reach the mainland” said USGS oceanographer and coauthor Bradford Butman. “These results will inform coastal communities and planners how water levels in back-barrier bays respond to ocean fluctuations.”
Several studies related to Hurricane Sandy recovery, restoration and rebuilding efforts, many of which are funded by Disaster Relief Appropriations Act 2013, are currently underway.
“The USGS is committed to providing the science foundation for federal, state, and local authorities to build more resilient communities,” said John Haines, coordinator of the USGS’ Coastal and Marine Geology Program. “This is one of many studies the USGS is doing to understand the effects of Hurricane Sandy and to evaluate the vulnerability of the coast and its communities to future storms.”
The study, “Water-level response in back-barrier bays unchanged following Hurricane Sandy,” by Aretxabaleta, A.L., Butman, B., and Ganju, N.K., is in the Geophysical Research Letters journal and available online.