One of the great fears generated by global warming is that the ocean is about to rise and swallow our coasts. These concerns have been heightened by the substantial uptick in Atlantic hurricane activity that began in 1995.
Those arguing that global warming is an overblown issue have been claiming for years that "consensus" forecasts of sea-level are equally overwrought. The United Nations' Intergovernmental Panel on Climate Change predicts a global average rise of from 3.5 to 34 inches by 2100, with a central estimate of 19 inches. Depending upon how you slice or dice the data, the last century saw maybe six inches.
Warmer water evaporates more moisture. The colder the land surface over which that moisture passes, the more it snows. So, Antarctica as a whole should gain snow and ice. Last year, C.H. Davis published a paper in Science about how this accumulating snowfall over East Antarctica was reducing sea level rise. This year, Duncan Wingham, at the 2005 Earth Observations summit in Brussels, demonstrated the phenomenon is observed all over Antarctica.
The only other masses of ice on the planet that can contribute to sea level rise are the non-polar glaciers, but they are very few and far between. The biggest is the Himalayan ice cap, but it's so high that a substantial portion will always remain.If all these glaciers melted completely -- including the Himalayan ice cap -- sea level could rise no more than five to seven inches, because there's just not that much mass of ice, compared to Antarctica and Greenland.
~reference: http://www.capmag.com/article.asp?ID=4470~
Those arguing that global warming is an overblown issue have been claiming for years that "consensus" forecasts of sea-level are equally overwrought. The United Nations' Intergovernmental Panel on Climate Change predicts a global average rise of from 3.5 to 34 inches by 2100, with a central estimate of 19 inches. Depending upon how you slice or dice the data, the last century saw maybe six inches.
Warmer water evaporates more moisture. The colder the land surface over which that moisture passes, the more it snows. So, Antarctica as a whole should gain snow and ice. Last year, C.H. Davis published a paper in Science about how this accumulating snowfall over East Antarctica was reducing sea level rise. This year, Duncan Wingham, at the 2005 Earth Observations summit in Brussels, demonstrated the phenomenon is observed all over Antarctica.
The only other masses of ice on the planet that can contribute to sea level rise are the non-polar glaciers, but they are very few and far between. The biggest is the Himalayan ice cap, but it's so high that a substantial portion will always remain.If all these glaciers melted completely -- including the Himalayan ice cap -- sea level could rise no more than five to seven inches, because there's just not that much mass of ice, compared to Antarctica and Greenland.
~reference: http://www.capmag.com/article.asp?ID=4470~
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