Polar Thaw Climate ExhibitLast Updated on 2008-10-06 00:00:00
"Polar Thaw," a 30-print exhibit of photographs from locations of Arctic and Antarctic climate warming, opened spring 2000 at the American Association for the Advancement of Science, Washington DC. It has also been exhibited at the Science Museum of Minnesota, and was at the Field Museum of Natural History in Chicago during fall 2003.
This exhibit, with detailed, informative captions, is available for display in museums, science centers, public libraries, and other funded venues. For more information, see the "Polar Thaw" information page or visit
National Science Foundation icebreaker Nathaniel B. Palmer cruises at dusk in the Antarctic Peninsula, on a study of disintegrating ice shelves. Print from "Polar Thaw" exhibit (see... More »
Global Warming in the ArcticLast Updated on 2008-10-04 00:00:00
Arctic Ocean sea ice diminishes to record low
Arctic sea ice surpassed all previous records for the lowest absolute minimum summer extent in September 2007. The "stunning record low" of 4.13 million square kilometers was recorded by satellite images on September 16, according to the National Snow and Ice Data Center. The previous record, 5.32 million square kilometers, was measured on September 20-21, 2005.
The minimum for 2007 is smaller by 1.19 million square kilometers (460,000 square miles) than the previous low. 2007 also saw the extended opening of the Northwest Passage through islands north of Canada for the first time. See http://nsidc.org
Polar bears listed as "threatened" under US law due to loss of sea ice.
The polar bear was officially listed as threatened under the U.S. endangered species act (ESA) on May 14, 2008. This the first... More »
Glaciers and Glacial Warming: Arctic Last Updated on 2008-10-04 00:00:00Ice Under Fire: Arctic
Geophysicist Tom Osterkamp indicates ground level when he installed this temperature probe pipe near Denali Park, 15 years ago.
Alaska permafrost temperature has increased 0.5° to 1.5° C since 1980, when Osterkamp began measuring ground temperature at 30 sites. Many of those sites show thermokarsting like this. Serious effects include forest damage, sinking roads and buildings, eroding tundra riverbanks, changes in tundra vegetation, and increased carbon dioxide and methane emissions from thawed peat.
Just how serious a threat thawing tundra can be is being measured in Northern Sweden.
Rising atmospheric temperatures are causing the disappearance of permafrost and its replacement with marshland or open water. At Stordalen Mire near Abisko National Park, where careful records... More »
Arctic GalleryLast Updated on 2008-04-19 17:03:30 Photos taken by Gary Braasch of the Arctic. More »
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