What are some of the signs of climate change?
• Temperatures are rising world-wide due to greenhouse gases trapping more heat in the atmosphere.
• Droughts are becoming longer and more extreme around the world.
• Tropical storms becoming more severe due to warmer ocean water temperatures.
• As temperatures rise there is less snowpack in mountain ranges and polar areas and the snow melts faster.
• Overall, glaciers are melting at a faster rate.
• Sea ice in the Arctic Ocean around the North Pole is melting faster with the warmer temperatures.
• Permafrost is melting, releasing methane, a powerful greenhouse gas, into the atmosphere.
• Sea levels are rising, threatening coastal communities and estuarine ecosystems.
Habitat for the Pacific walrus in the Chukchi Sea is disappearing from beneath them as the warming climate melts away Arctic sea ice in the spring, forcing the large mammals to “haul out” of the ocean and temporarily live on land.
Permafrost Loss Dramatically Changes Yukon River Chemistry and Hydrology with Potential Global Implications
New USGS-led research shows that permafrost loss due to a rapidly warming Alaska is leading to significant changes in the freshwater chemistry and hydrology of Alaska’s Yukon River Basin with potential global climate implications. Such permafrost degradation is already fundamentally transforming the way that high-latitude, Northern Hemisphere ecosystems function.
ANCHORAGE, Alaska — This year marks the 50th anniversary of one of the longest continuous glacier research efforts in North America.
Warming air temperature is predicted to change water temperature and water column mixing in Oregon’s Crater Lake over the next several decades, potentially impacting the clarity and health of the iconic lake, according to a U.S. Geological Survey report released today.
Using statistically modeled maps drawn from satellite data and other sources, U.S. Geological Survey scientists have projected that the near-surface permafrost that presently underlies 38 percent of boreal and arctic Alaska would be reduced by 16 to 24 percent by the end of the 21st century under widely accepted climate scenarios.
ANCHORAGE, Alaska — A new scientific study predicts that some of Alaska’s mammal species will respond to future climate warming by concentrating in northern areas such as the Arctic National Wildlife Refuge and the National Petroleum Reserve of Alaska. If true, for many species, this would be a significant northward shift into tundra habitats where they are currently absent.
Weaving concepts of ecology and climatology, recent interdisciplinary research by USGS and several university partners reveals how large-scale climate variability appears to connect boom-and-bust cycles in the seed production of the boreal (northern conifer) forests of Canada to massive, irregular movements of boreal birds.
A new scientific synthesis suggests a gradual, prolonged release of greenhouse gases from permafrost soils in Arctic and sub-Arctic regions, which may afford society more time to adapt to environmental changes, say scientists in a paper published in Nature today.
Frozen bodies of ice cover nearly 10 percent of the state of Alaska, but the influence of glaciers on the environment, tourism, fisheries, hydropower, and other important Alaska resources is rarely discussed.
The latest edition of the National Land Cover Dataset (NLCD 2011) for Alaska is now publicly available.
The U.S. Geological Survey announced today that improved global topographic (elevation) data are now publicly available for North and South America, Pacific Islands, and northern Europe. Similar data for most of Africa were previously released by USGS in September.
DENVER, Colo. — A pioneering airborne electromagnetic survey in the Yukon Flats near Fort Yukon, Alaska, by the U.S. Geological Survey has yielded unprecedented images of the presence and absence of permafrost to depths of roughly 328 feet.
This image shows the perimeter of Rainbow Glacier in Glacier National Park: 1966, 1998, 2005, 2015.
- Glacier Numerology – The how big, how long, how thick, how much, how often, of glacier science.
- Glacier Photography – While a picture may be worth a thousand words, a collection of images may tell a complete forensic story.
- Glacier Geophysics – How new technologies are being introduced to reexamine and refine decades old glacier analyses.
Heading out to take water chemistry samples for a study on permafrost in the Yukon River Basin. The study examined the chemical and hydrological changes occurring in the basin due to permafrost loss.
Jay Hootch, former employee of Yupitt of Andreafski, drills to take winter chemistry samples to be used in a permafrost loss study in the Yukon River Basin.
Barter Island sits at the top of the Arctic National Wildlife Refuge in Alaska, and with the Arctic facing quickly rising temperatures, USGS wants to investigate what’s causing the North Slope bluffs to erode so quickly. This permafrost environment is complex, so USGS studies many facets-- from radon in the groundwater to sand grains along the coast-- of this frozen...
Allen Bondurant measuring the depth to permafrost along a thermokarst lake shore.
-- are American pikas harbingers of changing conditions?
by USGS Research Ecologist Erik Beever
- American pikas are denizens of rocky talus and lava-flow habitats in mountain ecosystems across western North America
- Mountain environments, cauldrons of climatic harshness, exhibit sharp topographic, vegetative, and
The white colored rock (approximately 100ft high) shows the drop in the water level of Lake Mead as a result of the ongoing 10-year drought along the Colorado River.
Using phenology to take the pulse of our planet
By Jake F. Weltzin, Executive Director, USA National Phenology Network
- Citizens, scientists and natural resources managers are teaming-up to track biological events and cycles responding to changing climate
- Phenology is providing new insights into seasonal changes in
Glaciers are Earth's largest reservoir of freshwater. As they change, so does global sea level. Alaska has one of the largest accumulations of glaciers anywhere on Earth outside of the Polar regions. For most of the past half century, Alaska has experienced a significant increase in temperature that has profoundly impacted its glaciers. Join USGS scientist Dr. Bruce F....