Sunlight has more powerful influence ...

Sunlight has more powerful influence on ocean circulation and climate than North American ice sheets

There are 2 comments on the www.eurekalert.org story from Nov 7, 2008, titled Sunlight has more powerful influence on ocean circulation and climate than North American ice sheets. In it, www.eurekalert.org reports that:

A study reported in today's issue of Nature disputes a longstanding picture of how ice sheets influence ocean circulation during glacial periods.

The distribution of sunlight, rather than the size of North American ice sheets, is the key variable in changes in the North Atlantic deep-water formation during the last four glacial cycles, according to the article. The new study goes back 425,000 years, according to Lorraine Lisiecki, first author and assistant professor in the Department of Earth Science at the University of California, Santa Barbara.

She explained that the new data changes our understanding about how the different parts of the climate system are interacting with one another and in particular the influence of the ice sheets on climate. "Because the ice sheets are so large, it was a nice simple story to say that they were having the predominant influence on all the parts of the climate system," said Lisiecki. "But our study showed that this wasn't the only important part of the changes in climate. The distribution of sunlight is the controlling factor for North Atlantic deep water formation.

Join the discussion below, or Read more at www.eurekalert.org.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#2 Nov 8, 2008
I have always considered the sun to be a prime mover in climate.
Fun Facts

AOL

#3 Nov 10, 2008
Me too.

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