12B. ClimateChange

West antarctic ice sheet contains 32 million km3 of

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Unformatted text preview: ors: both natural and human. •  Temperature records show Earth warmed ~ 0.6oC past 100 yrs. •  1990’s warmest decade on record; 2005 the warmest year on record. •  11 out of last 12 years hottest on record. •  Heat waves more frequent. West Antarctic ice sheet contains > 3.2 million km3 of ice and is the last on Earth resting in a deep marine basin. It is the major player in any future sea level rise. Marine ice sheets are unstable and vulnerable to collapse. Collapse and melting of this ice sheet alone would raise sea level by 6 meters (19 feet). Warning Signs Today: Melting Glaciers Larsen Ice Shelf, Antarctica Potential Effects of Global Climate Change •  Warning Signs Today - Temperature: –  Heat wave in France and southern Europe (2003) killed ~15,000 people. –  Western US had second worst wildfire season (2002) in last 50 years. –  April - June, 1998 was driest 3-month period in 104 years in Florida, Texas, and Louisiana. –  National annual precipitation has increased 5 - 10% since early 20th century, largely the result of heavy downpours in some areas. •  Sea ice projected to shrink in both Arctic and Antarctic. •  Some projections show by later part of century, late-summer Arctic sea ice will disappear almost entirely. Satellite data has confirmed that the amount of sea ice that floats in chilly Arctic is much less than it used to be, and that's probably because of warmer Arctic temperatures. "Since 1979 we've seen that Arctic perennial sea ice cover has been declining at 9.6 percent per decade."...
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This note was uploaded on 04/02/2013 for the course 460 202 taught by Professor Sugarplum during the Fall '13 term at Rutgers.

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