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WASHINGTON - Weighing in on the highest profile debate about global warming, the nation's premier science policy body on Thursday voiced a "high level of confidence" that Earth is the hottest it has been in at least 400 years, and possibly even the last 2,000 years.
After all global warming is a natural event on earth. At what stage do we realize that we are destroying our environment?
If we do not learn our lesson now, we will continue to pollute other planets that we colonize in the future.
When will we learn that polluting has a price?
Originally posted by arius
we have the following equations detailing how long it has taken this amount of ice to accumulate
Originally posted by Truthwillsetyoufree
This sounds like the beginning of what could happen in that movie, "The day after tomorrow." Frightening, yes. Scary, absolutely. So why aren't the governments of the world more vocal on the subject? They spend more time on a North Korean Missile that may or may not be launched. Shouldn't they be spreading the word about how everything is about to fall apart?
Greenland ice cap may be melting at triple speed
The world's second largest ice cap may be melting three times faster than indicated by previous measurements, according to newly released gravity data collected by satellites.
The Greenland Ice Sheet shrank at a rate of about 239 cubic kilometres per year from April 2002 to November 2005, a team from the University of Texas at Austin, US, found. In the last 18 months of the measurements, ice melting has appeared to accelerate, particularly in southeastern Greenland.
"This is a good study which confirms that indeed the Greenland ice sheet is losing a large amount of mass and that the mass loss is increasing with time," says Eric Rignot, from NASA's Jet Propulsion Laboratory in Pasadena, California, US, who led a separate study that reached a similar conclusion earlier in 2006 (See Greenland's glaciers are speeding to the ocean). His team used satellites to measure the velocity of glacier movement and calculate net ice loss.
Yet another technique, which uses a laser to measure the altitude of the surface, determined that the ice sheet was losing about 80 cubic kilometres of ice annually between 1997 and 2003. The newer measurements suggest the ice loss is three times that.
COLUMBUS, Ohio, Aug. 10 (UPI) -- U.S. researchers say the most precise record of Antarctic snowfall ever generated shows no real increase in precipitation during the past 50 years.
The study's results from the Byrd Polar Research Center at Ohio State University show the snowfall was nearly static, although most computer models assessing global climate change call for an increase in Antarctic precipitation as atmospheric temperatures rise.
"The year-to-year and decadal variability of the snowfall is so large that it makes it nearly impossible to distinguish trends that might be related to climate change from even a 50-year record," said Andrew Monaghan, a center research associate and lead author of the study.
Antarctic snow may hide climate shock
A new study that shows Antarctic snowfalls have changed little in 50 years, despite global warming, could be evidence that the worst is yet to come, says one of the authors...
This contradicts the predictions of most climate models that are based on the assumption that warming air can carry more moisture and produce greater snowfalls at the poles.
"The models predict that Antarctic snowfall should be increasing with a warming atmosphere," says Australian team member and palaeoclimatologist Dr Ian Goodwin, of the University of Newcastle.
Goodwin doesn't challenge this basic climate physics. But says the recent evidence supports the idea, not recognised in climate models, that there is a lag between global warming and Antarctica's response to it.
The reason is that Antarctica and the southern hemisphere are surrounded by large oceans that take a long time to heat and therefore act as a buffer to climate change.
Greenland's massive ice sheet is melting rapidly, losing the equivalent of Lake Houston every six hours.
That's the conclusion of a study by University of Texas at Austin scientists that appears to confirm earlier, controversial research that suggests the melting of Greenland's ice has nearly tripled since the late 1990s. Greenland's ice sheet contains about 10 percent of the world's fresh water.
The findings concern climate scientists, who say that since the Industrial Revolution, and especially since the mid-1900s, carbon dioxide levels have risen by more than 40 percent. They attribute much of the increase to fossil fuel burning and say that, in the absence of increased carbon emissions, no natural factor can explain warming global temperatures.
Originally posted by pavil
One thing I have noticed is that global warming is primarily a Northern Hemisphere warming. By that I mean that it seems much more pronouced in the Northern Hemisphere rather than the same everywhere round the globe.
Does anyone have a sound reason for this?