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Attention citizen scientists: We need your help watching the way the world changes! For nature, timing is everything. So how does climate change affect the timing of things like flowers blooming and animals migrating, and why is this so important? Learn more, and find out how YOU can help us by observing the world around you from USGS scientist Jake Weltzin, Director of the National Phenology Network. (9:46) | Transcript/Links | Download directly (9.02 MB) (right-click to save) |
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The United States faces the potential for abrupt climate change in the 21st century that could pose clear risks to society in terms of our ability to adapt. USGS Associate Program Coordinator for the Office of Global Change John McGeehin discusses a new report on the potential for abrupt climate changes from global warming during this century. (8:41) | Transcript/Links | Download directly (7.96 MB) (right-click to save) |
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Temperature change in the Arctic is happening at a greater rate than other places in the Northern Hemisphere, and this is expected to continue in the future. As a result, glacier and ice-sheet melting, sea-ice retreat, coastal erosion and sea level rise can be expected to continue. USGS scientist Joan Fitzpatrick discusses a new report on past climate variability and change in the Arctic. (11:15) | Transcript/Links | Download directly (10.38 MB) (right-click to save) |
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More accurate predictions of future climate and improved understanding of today’s warming are possible with new data from the first comprehensive reconstruction of an extreme warm period. Past warm periods provide real data on climate change and are natural laboratories for understanding the global climate system. USGS scientists Harry Dowsett and Marci Robinson discuss this research and implications. (7:08) | Transcript/Links | Download directly (6.62 MB) (right-click to save) |
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Long-standing farming practices in California's Sacramento-San Joaquin River Delta expose fragile peat soils to wind, rain and cultivation, emit carbon dioxide (CO2) and cause land subsidence. To capture or contain the carbon, farmers would "grow" wetlands. In doing so, they would begin to rebuild the Delta's unique peat soils, take CO2 out of the atmosphere, ease pressure on the Delta's aging levees, and infuse the region with new economic potential. We learn more from USGS bio-geochemist Robin Miller about how this could help California, the nation, and the world. (8:34) | Transcript/Links | Download directly (7.92 MB) (right-click to save) |
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In the second part of our two-part drought mini-series, we head down South to talk with USGS scientists Curtis Weaver and Brian McCallum about the drought situation in the Southeastern United States. We also learn some eye-opening economic implications of drought. (Did you know that it's possibly the most expensive natural hazard to address?) (18:06) | Transcript/Links | Download directly (16.65 MB) (right-click to save) |
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In the first part of our two-part series on drought, we sit down with USGS scientists Julio Betancourt and Greg McCabe to talk about drought in the Western United States, along with some other interesting and surprising drought info. (For example, did you know that drought in the West and hurricanes in the Atlantic might be connected?) Tomorrow we'll bring you part two of this series, in which we'll talk with a couple USGS scientists about drought in the Southeast, so stay tuned. (19:05) | Transcript/Links | Download directly (17.56 MB) (right-click to save) |
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Sea ice, which is constantly thickening and thinning, plays an important role in the Earth's climate system. We sit down with USGS scientist Dave Douglas to discuss a newly developed modeling approach to estimate sea ice thickness—this is the only model based entirely on historic observations, and it was developed by scientists from the USGS and the Russian Academy of Sciences in Moscow. (5:54) | Transcript/Links | Download directly (5.48 MB) (right-click to save) |
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Three scientists talk about lesser-known topics that were brought to light in the media in 2007 by the USGS Science Picks, including the loss of coastal wetlands, leaping carp, and evolutionary teamwork. We also preview CoreFacts, the quick science Q & A we'll offer every weekday starting February 4th. Subscribe at www.usgs.gov.podcasts. (16:29) | Transcript/Links | Download directly (15.17 MB) (right-click to save) |
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In our second Earth Science Week installment, we talk with scientist Richie Williams about the USGS's amazing new satellite imagery of Antarctica as well as what's going on with ice on the southernmost continent. (4:34) | Transcript/Links | Download directly (4.27 MB) (right-click to save) |
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