منابع مشابه
Freeze tolerance in an arctic Alaska stonefly.
Most aquatic insects do not survive subzero temperatures and, for those that do, the physiology has not been well characterized. Nemoura arctica is a species of stonefly widely distributed throughout arctic and subarctic Alaska. We collected nymphs from the headwaters of the Chandalar River, where we recorded streambed temperatures as low as -12.7 degrees C in midwinter. When in contact with ic...
متن کاملGreening of arctic Alaska , 1981 – 2001
[1] Here we analyzed a time series of 21-yr satellite data for three bioclimate subzones in northern Alaska and confirmed a long-term trend of increase in vegetation greenness for the Alaskan tundra that has been detected globally for the northern latitudes. There was a 16.9% (±5.6%) increase in peak vegetation greenness across the region that corresponded to simultaneous increases in temperatu...
متن کاملClimigration? Population and climate change in Arctic Alaska
Residents of towns and villages in Arctic Alaska live on "the front line of climate change." Some communities face immediate threats from erosion and flooding associated with thawing permafrost, increasing river flows, and reduced sea ice protection of shorelines. The term climigration, referring to migration caused by climate change, originally was coined for these places. Although initial app...
متن کاملIce-age megafauna in Arctic Alaska: extinction, invasion, survival
Radical restructuring of the terrestrial, large mammal fauna living in arctic Alaska occurred between 14,000 and 10,000 years ago at the end of the last ice age. Steppe bison, horse, and woolly mammoth became extinct, moose and humans invaded, while muskox and caribou persisted. The ice age megafauna was more diverse in species and possibly contained 6 more individual animals than live in the r...
متن کاملStrong Temperature Increase and Shrinking Sea Ice in Arctic Alaska
Barrow, the most northerly community in Alaska, observed a warming of 1.51°C for the time period of 19212012. This represents about twice the global value, and is in agreement with the well-known polar amplification. For the time period of 1979-2012, high quality sea ice data are available, showing a strong decrease in sea ice concentrations of 14% and 16% for the Beaufort and Chukchi Seas, res...
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ژورنال
عنوان ژورنال: American Anthropologist
سال: 1957
ISSN: 0002-7294,1548-1433
DOI: 10.1525/aa.1957.59.6.02a00210