Tuesday, February 22, 2005

hell freezes over as oceans warm up... it fits together!

Greenhouse gases 'do warm oceans'
By Paul Rincon
BBC News science reporter, in Washington DC

Scientists say they have "compelling" evidence that ocean warming over the past 40 years can be linked to the industrial release of carbon dioxide.
US researchers compared the rise in ocean temperatures with predictions from climate models and found human activity was the most likely cause.

In coming decades, the warming will have a dramatic impact on regional water supplies, they predict.

Details of the study were released at a major science meeting in Washington DC.

The conference is the annual gathering of the American Association for the Advancement of Science (AAAS).

'High confidence'

"This is perhaps the most compelling evidence yet that global warming is happening right now and it shows that we can successfully simulate its past and likely future evolution," said lead author Tim Barnett, of the climate research division at the Scripps Institution of Oceanography in San Diego, California.

"If you take this data and combine it with a decade of earlier results, the debate about whether or not there is a global warming signal here and now is over at least for rational people."

Unless we know what we're dealing with, I think it's going to be pretty hard to fix it
Dr Tim Barnett, Scripps Institution of Oceanography

The team fed different scenarios into computer simulations to try to reproduce the observed rise in ocean temperatures over the last 40 years.
They used several scenarios to try to explain the oceanic observations, including natural climate variability, solar radiation and volcanic emissions, but all fell short.

"What absolutely nailed it was greenhouse warming," said Dr Barnett.

This model reproduced the observed temperature changes in the oceans with a statistical confidence of 95%, conclusive proof - say the researchers - that global warming is being caused by human activities.

'Political action'

Regional water supplies will be dramatically affected by climate change in the decades immediately ahead, say the team.

The western US is already experiencing water shortages and research suggests that the region could face a water crisis within 20 years.

In the South American Andes and western China, millions of people could be left without adequate water during the summer due to accelerated melting of glaciers.

"If the snow pack melts sooner, and if societies don't have the ability catch all of that water, they're going to end up with water shortages in the summer," Dr Barnett explained.

According to the Scripps researcher, political leadership was now needed to avert a global disaster.

"Hopefully we can get the US cranked around in that direction. I think the first thing to do is figure out the global warming-related problems we have ahead of us around the world.

"Unless we know what we're dealing with, I think it's going to be pretty hard to fix it."

Story from BBC NEWS:

Published: 2005/02/17 23:49:01 GMT



Blogger Wolf-Singer said...

"US researchers compared the rise in ocean temperatures with predictions from climate models and found human activity was the most likely cause."Well, DUH! Can you say "fossil fuels" and "greed"?

I wonder, Luciano, if the politicians have ever seen that movie the Day After Tomorrow. If they haven't, they should, because it not only shows a very real issue already affecting our planet, but it also shows what could happen if we don't smarten up...

Wolf Singer

8:57 AM  
Blogger Luminous (\ô/) Luciano ™ said...

Politicians have little time to go to the movies - and when they do, they prefer mindless comedies with Chris Rock...



10:54 AM  

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