Friday, August 8, 2008

Really abrupt climate change really happened


the day after tomorrow ad image

Lets finally give Roland Emmerich some credit; climate chaos and change actually does happen in real time. In the autumn 12,679 years ago, the Younger Dryas cold period swept in during the space of a year.

According to Discovery News, a team from the German Research Center for Geosciences in Potsdam, Germany, believes such a quick, profound change in climate could only have been brought about by a shift in winds across the northern hemisphere.

Michael Reilly writes: "Today prevailing winds in the northern hemisphere above the tropics tend to blow from the southwest to the northeast. Air that flows over Texas soon crosses the Atlantic and winds up over Norway.

As it travels the air passes over the Gulf Stream, a warm ribbon of water pouring northward from the tropics. The balmy air brings heat to Europe, which otherwise would be chilly. "

the day after tomorrow new york image

"The same was probably true just before the Yonger Dryas set in. But as the vast Ice Age glaciers retreated, their melt water flowed into the northern reaches of the Atlantic Ocean. The injection of fresh water made the sea easier to freeze, and a new skin of ice began advancing south.

The warm conveyor belt of Gulf Stream waters soon ebbed to a trickle. And as the sea ice advanced, the winds shifted into a west-east pattern. Within a year the breezes that warmed Europe had vanished." ::Discovery News

No comments: