If Arctic areas continue to warm, scientists speculate that thawing Arctic soils may
release significant amounts of carbon dioxide and methane currently trapped in permafrost.
With thawing permafrost projected to
release significant amounts of carbon in response to climate change, one of the editors of JGR: Biogeosciences reflects on the slew of recent papers in this field.
A more sound approach would recognize that (1) converting old forest to young forests
releases significant amounts of carbon (both above and below ground), (2) young forests are only good carbon sinks if they are allowed to grow and hold onto the carbon for centuries, yet there are too few economic incentives for doing so, and (2) the fraction of carbon that is put into long - term storage after logging is very small, i.e. old forests are better at storing carbon than our disposable culture.
A more sound approach would recognize that (1) converting old forest to young forests
releases significant amounts of carbon (both above and below ground), (2) young forests are only good carbon sinks if they are allowed to grow and hold onto the carbon for centuries, yet there are too few economic incentives for doing so, and (2) the fraction of carbon that is put into long - term storage after logging is very small, i.e. old forests are better at storing carbon than our disposable culture.
Not exact matches
With Arctic temperatures warming twice as fast as the global average, scientists estimate thawing permafrost could
release large
amounts of carbon into the atmosphere through the end
of the century with
significant climate impacts.
Plants naturally absorb
carbon dioxide and
release oxygen, but certain plants also eliminate
significant amounts of benzene, formaldehyde and / or trichloroethylene.
According to a new study
of 28,000 measurements collected between 2000 and 2006 and analyzed by NOAA's CarbonTracker system, only about a third
of the
carbon dioxide is absorbed by
carbon sinks such as the soil and forests; a large portion
of it ends up in the atmosphere - but that still leaves a
significant amount unaccounted for.Interestingly, the CarbonTracker found
carbon emissions to be highest in the Midwest; that single region
released more
carbon dioxide than any other country - except Russia, China, India and,
of course, the U.S.
Carbon dioxide was found to be most readily absorbed east
of the Rocky Mountains and in northern Canada.
Recent model results, by contrast, suggest that
significant impacts will persist for hundreds
of thousands
of years after emissions cease;» Matthews and Caldeira (2008): «We show first that a single pulse
of carbon released into the atmosphere increases globally averaged surface temperature by an
amount that remains approximately constant for several centuries, even in the absence
of additional emissions.»