Global Warming 101 Human Fingerprints
Union of Concerned Scientists - June 28, 2006
This article describes several cases of the earth getting warmer and puts the blame on the human element. While there is little solid proof within this article, one most be curious that this is more than a coincidence.
Astonishingly, every single year since 1992 is in the current list of the 20 warmest years on record.
By matching the observed and modeled patterns, scientists can now positively identify the “human fingerprints” associated with the changes. The fingerprints that humans have left on Earth’s climate are turning up in a diverse range of records and can be seen in the ocean, in the atmosphere, and at the surface.
As a result, current levels of carbon dioxide in the atmosphere are higher than at any time during the last 650,000 years.
The world’s oceans have absorbed about 20 times as much heat as the atmosphere over the past half-century, leading to higher temperatures not only in surface waters but also in water 1,500 feet below the surface.
Over the period 1979-1999, a study shows that human-induced changes in heat-trapping emissions and ozone account for more than 80 percent of the rise in tropopause height.
In fact, heat-trapping emissions are driving the climate about three times more strongly now than they were in 1950. The spatial pattern of where this warming is occurring around the globe indicates human-induced causes.
The article can be found here.
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