Democratic Underground Latest Greatest Lobby Journals Search Options Help Login
Google

UA Study Shows How Methane From Melting Permafrost Provided 87% Of Increase In Early Holocene

Printer-friendly format Printer-friendly format
Printer-friendly format Email this thread to a friend
Printer-friendly format Bookmark this thread
This topic is archived.
Home » Discuss » Topic Forums » Environment/Energy Donate to DU
 
hatrack Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Oct-26-07 12:54 PM
Original message
UA Study Shows How Methane From Melting Permafrost Provided 87% Of Increase In Early Holocene
Edited on Fri Oct-26-07 12:55 PM by hatrack
A team of scientists, led by a young researcher at the University of Alaska Fairbanks, has had its work published in the most recent issue of the magazine Science, slated to hit newsstands today. UAF researcher Katey Walter, 31, was lead author of the report, which discusses the role of methane gases bubbling from Arctic lakes had in warming the climate more than 10,000 years ago and suggests that similar processes are in the works again, potentially leading to drastic climate warming in coming years.

Ice cores from Greenland and Antarctica have shown that during the early Holocene Period about 14,000 to 11,500 years ago the levels of methane in the atmosphere rose significantly. Walters research suggests that methane bubbling from the bottom of thermokarst lakes, which are formed when permafrost thaws rapidly, could have been responsible for up to 87 percent of that methane spike.

Methane is of great concern because of how very potent it is as a greenhouse gas, Walter said. Methane is a stronger greenhouse gas. Methane is about 23 times stronger than carbon dioxide. Walters research focused on areas of Siberia and Alaska that, during the last ice age, were dry grasslands atop ice-rich permafrost. As the climate warmed, Walter said, that permafrost thawed, forming thermokarst lakes. Lakes really flared up on this icy permafrost landscape, emitting huge amounts of methane, she said.

As the permafrost around and under the lakes thaws, the organic material in it dead plants and animals can enter the lake bottom and become food for the bacteria that produce methane. The more permafrost that thaws, the more food microbes have and the more methane that enters the atmosphere, Walter said.

EDIT

http://newsminer.com/2007/10/26/9556
Printer Friendly | Permalink |  | Top
ben_meyers Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Oct-26-07 02:06 PM
Response to Original message
1. So I Have to ask again
what happened during the early Holocene Period to cause the global warming in the 1st place? It obviously wasn't Human caused.
Printer Friendly | Permalink |  | Top
 
Odin2005 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Oct-28-07 12:15 AM
Response to Reply #1
2. Cyclical changes in Earth's orbit and litlt.
http://en.wikipedia.org/wiki/Milankovitch_cycles




Oh and so much for the "sun is causing global warming" arguments:

"Ignoring anthropogenic and other possible sources of variation acting at frequencies higher than one cycle per 19,000 years, this model predicts that the long-term cooling trend which began some 6,000 years ago will continue for the next 23,000 years."
Printer Friendly | Permalink |  | Top
 
DU AdBot (1000+ posts) Click to send private message to this author Click to view 
this author's profile Click to add 
this author to your buddy list Click to add 
this author to your Ignore list Fri Aug 29th 2014, 05:23 PM
Response to Original message
Advertisements [?]
 Top

Home » Discuss » Topic Forums » Environment/Energy Donate to DU

Powered by DCForum+ Version 1.1 Copyright 1997-2002 DCScripts.com
Software has been extensively modified by the DU administrators


Important Notices: By participating on this discussion board, visitors agree to abide by the rules outlined on our Rules page. Messages posted on the Democratic Underground Discussion Forums are the opinions of the individuals who post them, and do not necessarily represent the opinions of Democratic Underground, LLC.

Home  |  Discussion Forums  |  Journals |  Store  |  Donate

About DU  |  Contact Us  |  Privacy Policy

Got a message for Democratic Underground? Click here to send us a message.

© 2001 - 2011 Democratic Underground, LLC