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World's oceans losing appetite for CO2.



Byline: ANI

Washington, November 21 (ANI): In a new study, scientists have determined that the world's oceans are losing their appetite for absorbing carbon dioxide carbon dioxide, chemical compound, CO2, a colorless, odorless, tasteless gas that is about one and one-half times as dense as air under ordinary conditions of temperature and pressure.  (CO2).

Between 2000 and 2007, as emissions of the potent greenhouse gas carbon dioxide skyrocketed, the amount of human-made carbon absorbed by the oceans fell from 27 to 24 percent.

In terms of ocean processes, "that's a pretty large drop, and the trend is pretty clear: The ocean can't keep up with human-made carbon," study leader Samar Khatiwala, an oceanographer at Columbia University's Lamont-Doherty Earth Observatory Lamont-Doherty Earth Observatory (LDEO) is a world-class research institution specializing in the Earth sciences and is part of Columbia University. The current director of Lamont is G. Michael Purdy. , told National Geographic News.

According to Khatiwala, the total uptake of carbon is not declining, but the rate is just not growing as fast as it used to.

But, if the oceans continue to be overwhelmed by carbon, more of the gas will remain in the already warming atmosphere, the authors say.

"Ultimately the ocean is what's controlling what's going on What's Going On is a record by American soul singer Marvin Gaye. Released on May 21, 1971 (see 1971 in music), What's Going On reflected the beginning of a new trend in soul music.  here," said Chris Sabine, a supervisory oceanographer at NOAA's Pacific Marine Environmental Laboratory in Seattle, Washington.

"It's a big deal that it's becoming less efficient in taking up CO2," he added.

For their study, Khatiwala and colleagues collected data on seawater seawater

Water that makes up the oceans and seas. Seawater is a complex mixture of 96.5% water, 2.5% salts, and small amounts of other substances. Much of the world's magnesium is recovered from seawater, as are large quantities of bromine.
 temperature and salinity recorded from 1765 to 2008.

The team also gathered data on amounts of ocean pollutants called chlorofluorocarbons.

These chemicals act as "tracers," allowing the scientists to figure out the time it takes for a substance to go from the surface of the ocean to the interior.

Based on this data, the team created a mathematical technique that allowed them to "work backward" to determine how much human-made carbon has entered the ocean over the years.

The researchers found that when human-made CO2 began increasing dramatically in the 1950s, the oceans began absorbing more of that carbon.

But, in recent decades, the rate of absorption has declined, and the reasons for the slowdown are still unclear.

It might have something to do with increased carbon dioxide emissions making seawater more acidic, because more acidic waters are less able to dissolve carbon dioxide.

Likewise, CO2 can't dissolve as easily in warmer water-which is why about 40 percent of past carbon emissions were absorbed into the chilly oceans off Antarctica, according to the study.

"The oceans are performing a tremendous service for humankind," NOAA's Sabine said.

"If we throw the oceans' carbon uptake out of whack, the potential is there to completely overwhelm what we're trying to do with limiting our fossil fuel emissions," he added. (ANI)

Copyright 2009 Asian News International The Asian News International (ANI) agency provides multimedia news to China and 50 bureaus in India. It covers virtually all of South Asia since its foundation and presently claims, on its official website, to be the leading South Asia-wide news agency.  (ANI) - All Rights Reserved.

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Publication:Asian News International
Date:Nov 22, 2009
Words:427
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