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31 maart 2012

Klimaatverandering kan 'compost-bom' ontsteken


Foto: Càrn na Ceàrdaich. A flat and boggy summit with views across the peatlands towards Ben More. Shot by Richard Webb, Wikimedia Commons via Geograph UK, under the Creative Commons Attribution-Share Alike 2.0 Generic license

Civilization Is At Risk Absent ‘Urgent And Large-Scale Action’ Warns Planetary Summit
Door Joe Romm, Climate Progress, 30 maart 2012

Climate change could fuel a giant ‘compost bomb’ … as decaying vegetation stuck under under the ice or in peat bogs starts to heat up and tips the world into dangerous global warming.

The Planet Under Pressure conference began with an urgent warning of fast-approaching tipping points like the “compost bomb.” It ended with a plea by the conference leaders for urgent and large-scale action. [...] The language is unusually blunt for scientists — or it would have been considered unusually blunt before humanity chose to ignore decades of warning by scientist [...].

Zie ook:

Soil microbes define dangerous rates of climate change
Seed Daily, 30 november 2010

Later toegevoegd:

'Opwarming aarde onderschat'
Nu.nl, 29 juni 2012

Temperature-Induced Increase in Methane Release from Peat Bogs: A Mesocosm Experiment
Door Julia F. van Winden, Gert-Jan Reichart, Niall P. McNamara, Albert Benthien, Jaap S. Sinninghe  Damsté, Plos One, 29 juni 2012

Nog later toegevoegd: 

Researchers Quantify Greenhouse Gases From Melting Arctic Permafrost
Door Bob Berwyn, Summit Country Citizens Voice / Climate Progress, 7 november 2012

[...] [Director of U.S. Geological Surveay Marcia McNutt:] 'While the permafrost of the polar latitudes may seem distant and disconnected from the daily activities of most of us, its potential to alter the planet’s habitability when destabilized is very real.'
As much as 44 billion tons of nitrogen and 850 billion tons of carbon could be released into the environment as the region begins to thaw over the next century. This nitrogen and carbon are likely to impact ecosystems, the atmosphere, and water resources including rivers and lakes. For context, this is roughly the amount of carbon stored in the atmosphere today. 

What Do Methane Deposits In The Antarctic And Arctic Mean For The Climate?
Door Verity Payne, Carbon Brief / Climate Progress, 30 augustus 2012

[...] Despite recent research suggesting that we’ve underestimated Arctic methane sources, there isn’t yet evidence to suggest that these sources are having a significant effect on atmospheric methane.

[...] Important warming feedbacks from methane emissions in the polar regions – particularly to the Arctic – have the potential to occur. But different feedbacks are likely to act over different timescales, and the possibility of sudden and catastrophic methane release may be overstated.

[...] although polar methane hydrate sources will probably become important over the long term, particularly if Arctic warming continues, in the nearer future it looks like wetlands will remain the major determining factor in global methane emissions. 

For Peat’s Sake: Record Temperatures And Wildfires In Eastern Russia Drive Amplifying Carbon-Cycle Feedback
Door Lynn Jenner, NASA/Goddard and Climate Progress, 31 augustus 2012

[...] the fires burning in Russia will have worldwide effects as the torched peat bogs whose layers consist of dead plant materials will end up releasing large quantities of carbon dioxide into the air accelerating the greenhouse effect [...].

UN report calls for closer monitoring of the world's permafrost
Door Graham Lloyd, The Australian, 28 november 2012

En m'n blognotities:
Bossen en klimaat gaan in rook op
Smeltende permafrost vormt tikkende tijdbom
Smeltende permaforst klimaatramp?
Hansen: aanpak CO2-uitstoot over 10 jaar is te laat
Het grimmige verloop van klimaatverandering

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