A 30,000-year Record Of Sea Surface Temperatures Off South Australia

Science Daily ^ | 8-3-2007 | American Geophysical Union

[blam]

Source: American Geophysical Union
Date: August 3, 2007

A 30,000-year Record Of Sea Surface Temperatures Off South Australia

Science Daily — Continental glaciers originating at both poles reached their farthest extent about 20,000 years ago, marking a time known as the Last Glacial Maximum.

Comparisons of ice cores from Greenland and Antarctica show that as these glaciers melted, warming occurred in asynchronous stages at the poles. While many northern hemisphere climate records match ice core records from Greenland, few southern hemisphere records exist to compare with ice core data from Antarctica.

Calvo et al. analyze a marine core collected off South Australia and find that it contains detailed signatures of surface temperatures of waters that washed over it since the glacial maximum.

Data from this core match well with Antarctic ice cores and paleoclimate records from the Australian continent, showing no signature of the Younger Dryas, a cooling event known to have occurred in the Northern Hemisphere about 13,000 years ago.

The new core data also reveal a progressive drop in sea surface temperatures over the last 6,500 years, an observation not seen before for the Australian region.

Title: Antarctic deglacial pattern in a 30 kyr record of sea surface temperature offshore South Australia

Authors: Eva Calvo: Institut de Ciències den Mar, Consejo Superior de Investigaciones Científicas, Barcelona, Spain;

Carles Pelejero: Institució Catalana de Recerca i Estudis Avançats and Institut de Ciències den Mar, Consejo Superior de Investigaciones Científicas, Barcelona, Spain;

Patrick De Deckker: Department of Earth and Marine Sciences, The Australian National University, Canberra, Australia;

Graham A. Logan: Petroleum and Marine Division, Geoscience Australia, Canberra, Australia.

Source: Geophysical Research Letters (GRL) paper 10.1029/2007GL029937, 2007

Note: This story has been adapted from a news release issued by American Geophysical Union.

[blam]

GGG Ping.

[cjohnson1]

and just exactly who was doing the measuring 30,000 years ago?? oh wait... the world was flat a few hundred years ago so maybe they’re just GUESSING!

[SunkenCiv]

Thanks blam.

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[SunkenCiv]

Thanks Blam.

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[GingisK]

Now, all they need to do is to find the farthest extent to which they receded. The cycle would then be better understood.

[Fido969]

So “Global Warming” started 20,000 years ago.

[P-40]

The cycle would then be better understood.

It wouldn't matter now. The debate is already over. The Profit Al Gore said so. :)

[blam]

"So “Global Warming” started 20,000 years ago."

More or less. With a 1,000 year cooling period at the Younger Dryas 13,000 years ago. And then, back to Global Warning which continues to this day. IMO, we're still coming out of the Ice Age. The Last Glacial Maximum(LGM) 18-23,000 years ago was one of the coldest periods during the whole Ice Age. It's probably what doomed the Neanderthals.

[MEGoody]

But, but, but. . .this can’t be true! It’s only mankind and our use of oil that causes global warming.

[Eric in the Ozarks]

And certain land masses in the northern latitudes are now rising, after being squashed by centuries of ice.

[GraniteStateConservative]

Because Gore wasn’t around to sell carbon offset credits.

[ari-freedom]

Mr. Assum Ptions

[LiteKeeper]

YEC INTREP

[allmendream]

<> No, they were taking MEASURMENTS.

[allmendream]

Calvo et al. analyze a marine core collected off South Australia and find that it contains detailed signatures of surface temperatures of waters that washed over it since the glacial maximum.

Data from this core match well with Antarctic ice cores and paleoclimate records from the Australian continent

[djf]

I read it twice...
Is it colder now than it was then or was it warmer back then?

I’m confused.

Scientists used to have to take at least a bare minimum English composition course, but I guess they dropped that requirement.

But thanks for the artickle!

[allmendream]

20,000 years ago was the last glacial maximum. Things have gotten warmer since then. Bush blamed.

[ken21]

the carbon offset thing is a united nations scam.

[xcamel]