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Science/Tech
See other Science/Tech Articles

Title: Ocean Acidity Linked to Mass Extinction
Source: [None]
URL Source: http://www.themarknews.com/articles ... dity-linked-to-mass-extinction
Published: Sep 11, 2011
Author: staff
Post Date: 2011-09-11 01:26:55 by Tatarewicz
Keywords: None
Views: 117
Comments: 1

Remember the ammonites? We don’t either.

A new Canadian study suggests that the greatest mass extinction ever may have been caused by high acidity in the ocean. Roughly 250 million years ago, back when we were all one massive super-continent, a mysterious force took out 90% of the Earth’s species. Scientists have long speculated about the cause, often blaming Siberian volcanoes or meteorites, though no one solidified with certainty the mechanism by which the animals were killed. According to St. Francis Xavier University researcher Alvaro Montenegro, it could well have been rising levels of acidity in the ocean, which can alter the way animals create their bodies from ocean minerals. Montenegro also says that ocean acidification is on the rise again and is associated with the effects of climate change.

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#1. To: Tatarewicz, *Agriculture-Environment* (#0)

Oceans are not acid, never have been acid and never will be acid. The way these articles are worded is misleading. The oceans are base, have always been base and will remain base. The recent rise in CO2, of which man has only contributed 3%, has caused the oceans to be slightly less base but not by much. The oceans are now cooling. The results will be that they can not only hold more CO2 but will out gas less CO2. Most people don't realize that even with the current rise, the Earth is at historic lows for atmospheric CO2 content.

farmfriend  posted on  2011-09-11   14:09:12 ET  Reply   Trace   Private Reply  


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