Word: permafrost
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...snows of Kilimanjaro, are disappearing from mountaintops around the globe. Coral reefs are dying off as the seas get too warm for comfort. Drought is the norm in parts of Asia and Africa. El Ni?o events, which trigger devastating weather in the eastern Pacific, are more frequent. The Arctic permafrost is starting to melt. Lakes and rivers in colder climates are freezing later and thawing earlier each year. Plants and animals are shifting their ranges poleward and to higher altitudes, and migration patterns for animals as diverse as polar bears, butterflies and beluga whales are being disrupted...
...cites "shrinkage of glaciers, thawing of permafrost, later freezing and earlier break-up of ice on rivers and lake, and poleward and altitudinal shifts of plant and animal ranges" as evidence of a change in global climate...
...that climatic changes are already reworking the far-north landscape. In the past two decades, average annual temperatures have climbed as much as 7[degrees]F in Alaska, Siberia and parts of Canada. Sea ice is 40% thinner and covers 6% less area than in 1980. Permafrost--permanently frozen subsoil--is proving less permanent. And even polar tourists are returning with less than chilling tales, one of which was heard around the world last week...
Humans are feeling the heat too. In Alaska, melting permafrost (occasionally hastened by construction) has produced "roller coaster" roads, power lines tilted at crazy angles and houses sinking up to their window sashes as the ground liquefies. In parts of the wilderness, the signal is more clear: wetlands, ponds and grasslands have replaced forests, and moose have moved in as caribou have moved out. On the Mackenzie River delta in Canada's Northwest Territories, Arctic-savvy Inuit inhabitants have watched with dismay as warming ground melted the traditional freezers they cut into the permafrost for food storage. Permafrost provides stiffening...
...miles east of Nuuk (the modern capital) noticed several large pieces of wood sticking out of a bluff. Because trees never grew in the area, they reported their discovery to the national museum. The wood turned out to be part of an enormous Norse building, perfectly sealed in permafrost covered by 5 ft. of sand: "definitely one of the best-preserved Norse sites we have," says archaeologist Joel Berglund, vice director of the Greenland National Museum and Archives in Nuuk...