Re: [Ag-umwelt] Methan blubbert aus dem arctischen shelf

["Dr. Volker Jaenisch" <volker.jaenisch AT inqbus.de>]

Ahoi Ulrich!

On 16/12/11 00:55, Ulrich Bär wrote:

2011/12/16 Ulrich Bär <ulrich.baer AT gmail.com>:

estevan point hat welche
http://gaw.kishou.go.jp/cgi-bin/wdcgg/quick_plot.cgi?imagetype=png&dataid=200702141178

candle lake mit höheren Werten, dichter ran kommst du wohl nicht
http://gaw.kishou.go.jp/cgi-bin/wdcgg/quick_plot.cgi?imagetype=png&dataid=200908280055

"""
Measurements of atmospheric CH₄ from air samples collected weekly at 46 remote surface sites show that, after a decade of near-zero growth, globally averaged atmospheric methane increased during 2007 and 2008. During 2007, CH₄ increased by 8.3 ± 0.6 ppb. CH₄ mole fractions averaged over polar northern latitudes and the Southern Hemisphere increased more than other zonally averaged regions. In 2008, globally averaged CH₄ increased by 4.4 ± 0.6 ppb; the largest increase was in the tropics, while polar northern latitudes did not increase. Satellite and in situ CO observations suggest only a minor contribution to increased CH₄ from biomass burning. The most likely drivers of the CH₄ anomalies observed during 2007 and 2008 are anomalously high temperatures in the Arctic and greater than average precipitation in the tropics. Near-zero CH₄ growth in the Arctic during 2008 suggests we have not yet activated strong climate feedbacks from permafrost and CH₄ hydrates.
"""
http://www.agu.org/journals/ABS/2009/2009GL039780.shtml

"""
We emphasize that, although changing climate
has the potential to dramatically increase CH4 emissions
from huge stores of carbon in permafrost and from Arctic
hydrates, our observations are not consistent with sustained
changes there yet.
"""

http://nldr.library.ucar.edu/repository/assets/osgc/2009GL039780.pdf

Sieht nicht nach der Arktis aus. Puh!

Beste Grüße

Volker

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