On Sep 11, 5:32*pm, "bw" wrote:
"Last Post" wrote in message

...
Study Rules Out Ancient 'Bursts' Of Methane From Seafloor Deposits
ScienceDaily (Aug. 24, 2006) —
A dramatic increase about 12,000 years ago in levels of atmospheric
methane, a potent greenhouse gas, was most likely caused by higher
emissions from tropical wetlands or from plant production, rather than
a release from seafloor methane deposits, a new study concludes.

•• Note: 12,000 ago was just at the end of the last ice age

This research, to be published Friday in the journal Science,
contradicts some suggestions that the sudden release of massive
amounts of methane frozen in seafloor deposits may have been
responsible -- or at least added to - some past periods of rapid
global warming, including one at the end of the last ice age.

The findings were made with analysis of carbon isotopes from methane
frozen in Greenland ice core samples, by researchers from Oregon State
University, the University of Victoria, University of Colorado, and
the Scripps Institution of Oceanography at the University of
California-San Diego.

For climate researchers, an understanding of methane behaviour is of
some significance because it is the second most important "greenhouse
gas" after carbon dioxide.

•• Bull****!!! The ONLY important GHG is H2O which
* * comprises 12,387 parts per MILLION or 97% of the
* * total. Methane @ 1.745 parts per BILLION is too
* * insignificant to count. CO2 is measured @ 385 ppm
* * and is constantly being recycled.

There is no point is saying H2O is at that exact value, it's too variable..

•• You are ducking and dodging trying to make a
point that just can not be made.

At any point in the day H2O is going to be
97±% of the gasses in the troposphere. At
any point in the day CO2 is going to have 3±%
of the gasses. Now methane, nitrous oxide,
CFC etc have zero impact, no matter what you
might say.

Its atmospheric concentration has increased about 250 percent in the
last 250 years, and it continues to rise about 1 percent a year.

•• ROTFLMAO - How much is 1% of 1.745 parts per billion. 0.01745 ??

You keep making the same mistake on methane. It's actually 1.7 parts per
million. Not billion.

•• It is no mistake and I do not accept your nonsense.
However, the methane numbers are insignificant.
Methane itself is the most common compound on
Earth. It is the prime element in natural gas and
crude oil.

•• I was fortunate to have the late great Dr
Griffith Taylor for my teacher during his last
2 years teaching. To learn from someone who had
been there, was a great experience.