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Unformatted text preview: ors: both natural and human. • Temperature
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
• 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
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
• 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.
- Fall '13