On 12/4/2016 7:22 AM, David Hartung wrote:
>
> A good read
You're citing the CATO Institute on 'climate'?
*>LOL!<*
Study Warns Methane from Melting Arctic Permafrost is ‘Certain to
Trigger Additional Warming’
A new study finds that melting Arctic permafrost from man-made global
warming is releasing large amounts of methane into the atmosphere – and
the resulting feedback loop is “certain to trigger additional warming.”
The study led by University of Guelph (Ontario, Canada) biology
Professor Merritt Turetsky examined 71 wetlands around the globe and
discovered that wetlands in northern latitudes are releasing much more
methane gas than previously thought.
http://inhabitat.com/methane-from-melting-arctic-permafrost-certain-to-trigger-additional-warming-new-study/
A synthesis of methane emissions from 71 northern, temperate, and
subtropical wetlands
Wetlands are the largest natural source of atmospheric methane. Here, we
assess controls on methane flux using a database of approximately 19 000
instantaneous measurements from 71 wetland sites located across
subtropical, temperate, and northern high latitude regions. Our analyses
confirm general controls on wetland methane emissions from soil
temperature, water table, and vegetation, but also show that these
relationships are modified depending on wetland type (bog, fen, or
swamp), region (subarctic to temperate), and disturbance. Fen methane
flux was more sensitive to vegetation and less sensitive to temperature
than bog or swamp fluxes. The optimal water table for methane flux was
consistently below the peat surface in bogs, close to the peat surface
in poor fens, and above the peat surface in rich fens. However, the
largest flux in bogs occurred when dry 30-day averaged antecedent
conditions were followed by wet conditions, while in fens and swamps,
the largest flux occurred when both 30-day averaged antecedent and
current conditions were wet. Drained wetlands exhibited distinct
characteristics, e.g. the absence of large flux following wet and warm
conditions, suggesting that the same functional relationships between
methane flux and environmental conditions cannot be used across pristine
and disturbed wetlands. Together, our results suggest that water table
and temperature are dominant controls on methane flux in pristine bogs
and swamps, while other processes, such as vascular transport in
pristine fens, have the potential to partially override the effect of
these controls in other wetland types. Because wetland types vary in
methane emissions and have distinct controls, these ecosystems need to
be considered separately to yield reliable estimates of global wetland
methane release.
http://onlinelibrary.wiley.com/doi/10.1111/gcb.12580/abstract
--
Republicans often as not create the very problems they say
that they're trying to solve, while blaming the Democratic
Party for what they did..