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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: tejek who wrote (150478)	8/27/2002 5:39:08 PM
From: TimF	Respond to of 1584437

Isn't that what I said? The "it" in question was not global warming but rather global warming extreme enough to "easily will exceed those ranges". That's not true.......they have extended out the current rate of increase in the average global temp., and from that, extrapolated what daily temps would be like for key US cities in the year 2050. In fact, US Today did a whole weather map with these temps plugged in. It was not pretty. You can make all sorts of fancy maps but the data the maps are based on is not supported to well. We don't even have a solid figure for the current rate of increase let alone knowledge about possible future rates of increase. As for sea levels your talking about a rise of perhaps a few inches, something similar to what is caused by shorter term effects like El Nino. Here is a good article focusing on one factor that the global warming and sea level rise models don't even consider. news.bbc.co.uk By some estimate global warming could raise sea level by a couple of feet but some estimates show changes of more like a few milimeters over the course of the next century. And if the above article is accurate sea levels could drop. Some other interesting articles news.bbc.co.uk Ozone hole on the mend? nature.com Water cools the world The Earth's climate depends less on the Sun than we might think. nature.com Global climate: no change South America's oldest trees give up the ghost of climate past. nature.com Escaping the big freeze A ring of bright water around a deep-frozen Earth some 600-800 million years ago might have provided the refuge that life needed to persist, Philip Ball reports. nature.com Layering Up Satellite Reveals Antarctica’s Ice Sheet Is Getting Thicker abcnews.go.com ANTARCTICA DESERT GETTING COLDER New York Times January 13, 2002 Internet: nytimes.com Antarctica's harsh desert valleys -- long considered a bellwether for global climate change -- have grown noticeably cooler since the mid-1980s, scientists report, even while the Earth as a whole is warming. Air temperatures recorded continuously over a 14-year period ending in 1999 declined by about 1 degree Fahrenheit in the polar deserts and across the White Continent, according to prominent researchers from 11 American universities and government laboratories. The cooler temperatures are triggering a cascade of ecological consequences in the sensitive and barren region known as the Dry Valleys. They include a 10 percent annual decline in tiny soil organisms and a 9 percent annual decline in the biological productivity of a handful of ice-covered freshwater lakes, the study shows. The report appeared Sunday in an online edition of the journal Nature. ________ Tempeture and CO2 levels since the last ice age brighton73.freeserve.co.uk Tempeture and CO2 levels over the last 600million years brighton73.freeserve.co.uk _____________ Global Warming Will Not Raise Sea Level Presented at the 1997 Fall Meeting of the American Geophysical Union S. Fred Singer, Ph.D. Global sea level (SL) has undergone a rising trend for at least a century; its cause is believed to be unrelated to climate change [1]. We observe, however, that fluctuations (anomalies) from a linear SL rise show a pronounced anti-correlation with global average temperature--and even more so with tropical average sea surface temperature. We also find a suggestive correlation between negative sea-level rise anomalies and the occurrence of El Nino events. These findings suggest that--under current conditions-- evaporation from the ocean with subsequent deposition on the ice caps, principally in the Antarctic, is more important in determining sea-level changes than the melting of glaciers and thermal expansion of ocean water. It also suggests that any future moderate warming, from whatever cause, will slow down the ongoing sea-level rise, rather than speed it up. Support for this conclusion comes from theoretical studies of precipitation increases [2] and from results of General Circulation Models (GCMs) [3,4]. Further support comes from the (albeit limited) record of annual ice accumulation in polar ice sheets [5]. sepp.org