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scpg02

Ancient British bog provides clue to global warming

Contact: Cherry Lewis
cherry.lewis@bristol.ac.uk
44-117-928-8086
University of Bristol

Ancient British bog provides clue to global warming

Quote:
Analysis of sediments from a British bog suggest that methane emissions increased due to intense global warming around 55 million years ago.

Dr Richard Pancost from the University of Bristol and colleagues, publishing today in Nature, show that carbon isotope values of hopanoids -- compounds made by bacteria -- suddenly decrease in a manner that can only be explained by switching to a diet of methane. This suggests that methane emissions must have increased at that time.

The team from Bristol University, Royal Holloway and other institutions analysed the geochemical composition of sediments taken from the Cobham Lignite wetland in southeast England, revealed when the Channel Tunnel rail link cut through it.

http://www.eurekalert.org/pub_releases/2007-09/uob-abb091707.php
Andre

Thanks Maggie,

Most the methane did increase but it may not have had a lot to do with global warming. The methane is alsmost certain from the decompostion of oceanic methane hydrate, clathrate.

There is a pet idea about that here:

http://www.physicsforums.com/showthread.php?t=148461

Will elaborate later

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