Arctic Climate Emergency
ARCTIC METHANE
2015 AMAP assessment Methane as Arctic climate forcer
Satellite Data Video Shows Methane Escape in Arctic May 24, 2012.
This video provides a vision (AIRS satellite) of Arctic permafrost melting and concentrations of methane in the Arctic atmosphere over the past decade. Under rapid sustained Arctic warming As the months tick by, Arctic Russia and Canada turn red as methane escapes to the atmosphere.
This NOAA image shows post 2007 methane emissions
(flux) increase from Boreal (subarctic) regions.
Methane is highly reactive asa chemical in the
atmosphere, making it very difficult to pin down
changes and sources of emissions and their effect.
This is made worse by inadequate monitoring capacities.
Methane tends to get concentrated over the high latitides.
Most emissions are from the NH and Hydroxyl OH that
removes methane works best in the cold.
Though there is no agreement among experts, we know
that warming weltlands and thawing permafrost will release more methane with more Arctic warming.
There is certainly evidence from several research approaches that subarctic warming wetlands are releasing more methane. Local permafrost research over many years has shown that thawing permafrost is emitting methane.
Nick Breeze article on Arctic methane with interview videos
Arctic methane sources
Latest research
13 Jan 2015 CAGE Ice-sheet-driven methane storage and release in the Arctic.
27 April 2015 Microbes methane & Arctic climate change- release methane at a low Arctic warming
14 April 2015 Deep Arctic source of methane discovered
2014 CO2 and CH4 in sea ice (methane source)
Oct 2014 methane microbe found
June 2914 Earth Methane Methane ppb increase from wetlands increasing more than Russian gas. Nisbet.
Jan 214 Nisbet et al Methane rising again
May 2014 Understanding Arctic methane variability
April 2014 Wetlands l to blame for atmospheric methane increases:
April 2014 Synthesis of methane emissions from.. wetlands (above)
March 2014 Methane-producing microbe blooms in permafrost thaw. The methanogens now have access to carbon dioxide and hydrogen which they convert into methane. The methane is let out into the atmosphere and contributes to further global warming
Sept 2013 Three decades of global methane sources and sinks.
..rise in natural wetland emissions and fossil fuel emissions probably accounts for the renewed increase in global methane levels after 2006, although the relative contribution of these two sources remains uncertain.
2011 Isaksen Strong atmospheric chemistry feedback to climate warming from Arctic methane emissions
2011 DLUGOKENCKYGlobal atmospheric methane: budget, changes and dangers
2010 AIRS methane ;post 2007 NH increase
AGW Observer to 2010
Papers on methane emissions.
RUNAWAY Arctic methane amplifying feedback from
multiple large methane sources has for many years been
called the Arctic methane bomb. It is the main source
of amplifying feedbacks in the runaway climate change
scenario of global warming planetary catastrophe.
This is the most thorough published description.
The feedback loop can be described in simple
terms as follows: rising CH4 emissions from wetlands,
thawing permafrost, and destabilizing marine hydrates
increase atmospheric CH4 concentrations; this increase
in CH4 concentration, amplified by the effect of CH4
on its own chemical lifetime, results in a greater radiative
forcing on climate and terrestrial ecosystems.
The ecosystems, given our current understanding,
respond to the warmer, more humid conditions by
an increase in BVOCs, which further augments the
chemical lifetime of CH4. Finally, the resulting
additional radiative forcing could lead to more or
faster thawing of permafrost, further destabilization
of marine hydrates, and potentially even larger
wetland CH4 emissions. POSSIBLE ROLE OF WETLANDS,
PERMAFROST, AND METHANE HYDRATES IN THE
METHANE CYCLE UNDER FUTURE CLIMATE CHANGE
: A REVIEW F. O’Connor
In addition to the warming effect of current forcing and emissions, methane plays a role in climatic feedback mechanisms that can exacerbate warming and even lead to abrupt, catastrophic climate change in the future. This risk is primarily associated with the rapid release of carbon stores in the Arctic.
A major release of Arctic methane would have a devastating impact on the global climate, and evidence indicates it has played a role in past warming events in the paleoclimate record. J. Stolaroff et al Environ. Sci. Technol. July 2012.
Research has shown a syncronous increase in Arctic temperature, sea ice decline, Arctic methane.
The age of deadly methane feedback
Since 2007, there has been a step change in dangerous climate due to the start (sustained 2013) of planetary methane feedback emission cause by the warming planet.
Arctic methane in 2013 reached 1900 ppb (the 800,000 year methane maximum is 800 ppb).
The highest methane concentration is at Lac La Biche Alberta right on the southern edge of the vast Canadian wetlands. Methane there is 2000ppb with spikes up to 250ppb. The 800,000 year atmospheric methane maximum is 800ppb,
Arctic methane is a global warming carbon bomb (as has been recognized for many years). A recent review article in Nature called Arctic methane a 'sleeping giant'.
UNEP published a special report Methane from the Arctic in 2008.
Latest research finds the Arctic is already a substantial source of methane to the atmosphere: as much as 50 million metric tons of methane is released per year. It is certain this will greatly increase with global warming.
PERGAMON research project : Permafrost and gas hydrate related methane release in the Arctic and impact on climate change has ongoing research projects and some results.
Sea ice in the Arctic Ocean: Role of shielding and consumption of methane. Xin Hea,
Liguang Sun March 2013. Intact sea ice may limit methane emissions by allowing methane consumption and breakdown under the ice cover.
A 2010 review of the Arctic carbon budget by D. McGuire et al finds that the Arctic contains several times the amount of carbon in the atmosphere. Most is potentially methane. The review finds many Arctic changes that will result from global warming will increase the emission of Arctic methane.
Arctic methane sources: Isotopic evidence for atmospheric inputs 2011 by R. E.Fisher et al illustrated the significance of wetland emissions that may respond quickly and powerfully to sustained climate warming.
How much carbon as potential methane is there in the Arctic?
The Arctic holds several times atmospheric carbon.
o Arctic wetlands hold a great deal of carbon that is emitted as methane by warming.
o Permafrost holds a currently estimated carbon pool of double atmospheric carbon, mainly as potential methane. When permafrost thaws it adds to the wetlands
o The East Siberian Arctic Shelf holds over 90% of Arctic methane hydrate, which is estimated at double atmospheric carbon.
o The subarctic Boreal forest is the largest forest store of carbon, even more than the Amazon.
Boreal forest fires emit mainly CO2 but some CH4 is also emitted. In forested regions over permafrost the fire thaws surface permafrost and more methane is released.
Svalbard Arctic readings have shown methane emissions in the Arctic are leading to increased methane concentration in the air.
21.06.10 Measurements taken in Svalbard confirm that the concentration of greenhouse gases in the atmosphere continues to increase. Researchers are taking the increased methane concentration seriously. This is alarming if one of the reasons for it is the release of methane from thawing permafrost and the Arctic sea bed.
Current sources of Arctic methane emissions - feedback to global (Arctic) warming.
Leaking methane from the cryocap- edges of glaciers permafrost and new lakes in the ice were discovered by Katey Walter published in 2012.
Methane was found leaking through the sea ice published by E. Kort 2012 presently assumed to be from proliferating surface microorganisms beneath the ice.
Increased methane from warming subarctic peat wetlands.
Thermokarst lakes in thawing permafrost
Thawing permafrost.
Sea floor sediment frozen solid methane gas hydrate.
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