February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 5, MAY 1994
PROFESSIONAL PUBLICATIONS... METHANE CYCLE
Methane," J. Rudolph (Inst. Atmos. Chem., Forschungszentrum
Jülich, 52425 Jülich, Ger.), Nature, 368(6466),
19-20, Mar. 3, 1994.
Possible explanations for the small increase in atmospheric
methane in 1992 are less intensive biomass burning, cooling due
to the Mount Pinatubo eruption in 1991, changes in average
tropospheric OH concentration, and changes in factors that affect
methane and CO2 in a similar way (CO2 increase was also small in
Relationship Between the Methane Seasonal Cycle and Regional
Sources and Sinks at Tae-ahn Peninsula, Korea," E.J.
Dlugokencky (CMDL, NOAA, 325 Broadway, Boulder CO 80303), J.M.
Harris et al., Atmos. Environ., 27A(14), 2115-2120,
Observations combined with a 3D model suggest that methane
emission rates from wetlands in the far east of the former USSR may
be twice those from Alaskan wetlands.
Production Control of Methane Emission from Wetlands," G.J.
Whiting (Dept. Biol., Newport Univ., Newport News VA 23606), J.P.
Chanton, Nature, 364(6440), 794-795, Aug. 26, 1993.
Finds a positive correlation between CH4 emissions and net
ecosystem production. Greater primary production and soil
microbial activity due to elevated CO2 would lead to greater CH4
emissions, further enhancing the greenhouse effect.
from Tellus, 45B(3), July 1993:
"The Atmospheric CH4 Increase Since the Last Glacial
Maximum. 1. Source Estimates," J.A. Chappellaz (CNRS Lab.
Glac., BP 96, 38402 St. Martin d'Hères Cedex, France), I.Y.
Fung, A.M. Thompson, 228-241. Estimates indicate that change in
the wetland source was a major factor in the atmospheric CH4
increase from the Last Glacial Maximum to the Pre-Industrial
"...2. Interactions with Oxidants," A.M. Thompson
(NASA-Goddard, Greenbelt MD 20771), J.A. Chappellaz et al.,
242-257. Studies of the effect of changing CH4 fluxes on global
tropospheric oxidant levels show that OH has decreased since the
Last Glacial Maximum. Models disagree on projections for future
and CH4 Dynamics of a Sphagnum-Dominated Peatland in West
Virginia," J.B. Yavitt (Dept. Nat. Resour., Cornell Univ.,
Ithaca NY 14853), R.K. Wieder, G.E. Lang, Global Biogeochem.
Cycles, 7(2), 259-274, June 1993.
Field measurements suggest that a temperate climate imposed on
northern peatlands could mobilize stored carbon and increase CO2
and CH4 emissions into the troposphere.
Emission from Arctic Tundra," T.R. Christensen (Scott Polar
Res. Inst., Univ. Cambridge, Lensfield Rd., Cambridge CB2 1ER,
UK), Biogeochem., 21(2), 117-139, May 1993.
Estimates of the global tundra CH4 source, based on
measurements from a true Arctic tundra site, are within the range
of 42 ± 26 Tg CH4/yr found in studies of similar sub-Arctic
Flux: Water Table Relations in Northern Wetlands," T.R.
Moore (Dept. Geog., McGill Univ., Montreal PQ H3A 2K6, Can.),
N.T. Roulet, Geophys. Res. Lett., 20(7), 587-590,
Apr. 9, 1993. Peatland drainage has reduced global CH4 emissions
by about 1 Tg/yr during the last 100 years.
in Tropospheric Methane Between 1841 and 1978 from a High
Accumulation-Rate Antarctic Ice Core," D.M. Etheridge
(CSIRO, Priv. Bag 1, Mordialloc, Victoria 3195, Australia), G.I.
Pearman, P.J. Fraser, Tellus, 44B(4), 282-294, Sep.
Methane growth rates have generally increased about 1% per
year since the onset of the Industrial Revolution, to 14 ppbv/yr
by the 1970s.
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