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The National Snow and Ice Data Center (NSIDC) is a United States information and referral center in support of polar and cryospheric research.NSIDC archives and distributes digital and analog snow and ice data and also maintains information about snow cover, avalanches, glaciers, ice sheets, freshwater ice, sea ice, ground ice, permafrost, atmospheric ice, paleoglaciology, and ice cores.
The observatory was originally located on 18th Street in St. Louis City; it was moved with the rest of the University to the Danforth Campus upon the conclusion of the 1904 World's Fair. The current observatory dome was built in 1954, when the Yeatman refractor telescope was relocated from where Louderman Hall currently stands.
Track the latest winter storm as it sweeps across Texas and through the Tennessee Valley into the Southeast on Thursday and Friday with live radar maps, snow forecasts and freezing rain potential.
The Arctic ice pack is the sea ice cover of the Arctic Ocean and its vicinity. The Arctic ice pack undergoes a regular seasonal cycle in which ice melts in spring and summer, reaches a minimum around mid-September, then increases during fall and winter. Summer ice cover in the Arctic is about 50% of winter cover. [1]
Summertime Arctic-wide sea ice extent simulated by the GFDL CM2.1 model for the historical period 1860 to 2000 and projected for the 21st century following the SRES A1B emissions scenario. Sea ice extent values are normalized (scaled) so that the average for years 1981 to 2000 is equal to 100%. Totally ice free summer conditions would equal 0%.
The Arctic Ocean is the mass of water positioned approximately above latitude 65° N. Arctic Sea Ice refers to the area of the Arctic Ocean covered by ice. The Arctic sea ice minimum is the day in a given year when Arctic sea ice reaches its smallest extent, occurring at the end of the summer melting season, normally during September.
There are no Arctic-wide or Antarctic-wide measurements of the volume of sea ice, but the volume of the Arctic sea ice is calculated using the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) developed at the University of Washington Applied Physics Laboratory/Polar Science Center. PIOMAS blends satellite-observed sea ice ...
Their simulation had run for over 1,700 years before the collapse occurred and they had also eventually reached meltwater levels equivalent to a sea level rise of 6 cm (2.4 in) per year, [39] about 20 times larger than the 2.9 mm (0.11 in)/year sea level rise between 1993 and 2017, [79] and well above any level considered plausible.