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Warwick et al. 2002
Warwick, N.J., Bekki, S., Law, K.S., Nisbet, E.G. and Pyle, J.A. (2002). The impact of meteorology on the interannual growth rate of atmospheric methane. Geophysical Research Letters 29: doi: 10.1029/2002GL015282. issn: 0094-8276.

The impact of interannual changes in meteorology on the local and global growth rates of atmospheric methane is assessed in a nineteen year simulation using a tropospheric chemical transport model forced by ECMWF meteorological analyses from 1980 to 1998. A very simple CH4 chemistry scheme has been implemented, using prescribed OH fields. There are no interannual variations in modeled methane emissions or in the OH fields, so any changes in the modeled growth rate arise from changes in meteorology. The methane simulation shows significant interannual variability at both local and global scales. The local scale variability is comparable in magnitude to the interannual variability found in surface observations and shows some clear correlation with observed changes in growth rates. This suggests that, even over interannual timescales, meteorology could be important in driving the interannual fluctuations of atmospheric methane at the surface.

BACKGROUND DATA FILES

Abstract

Keywords
Atmospheric Composition and Structure, Troposphere--constituent transport and chemistry, Atmospheric Composition and Structure, Constituent sources and sinks, Atmospheric Composition and Structure, Troposphere--composition and chemistry, Atmospheric Composition and Structure, General or miscellaneous, Meteorology and Atmospheric Dynamics, General circulation
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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