Friday, January 27, 2012

Ocean acidification

A paper out this week in Nature Climate Change confirms that CO2 emissions over the last 100 to 200 years have raised ocean acidity far beyond the range of natural variations. Like atmospheric climate change the issue of ocean acidification is complicated by seasonal, regional and various long term trends. However direct observations of pH in the oceans only go back 30 years and so various techniques need to be used to estimate ocean pH in the past. Detecting regional anthropogenic trends in ocean acidification against natural variability

The picture is the cover of a report on Ocean Acidification released in 2010 by Oceana, an international organization working to protect the world's oceans.

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