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 (20).
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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.
This is a Published version This version's date is: 15/10/2002 This item is peer reviewed
https://repository.royalholloway.ac.uk/items/939b101c-e8c1-5db5-c138-f436acf1f807/1/
Deposited by () on 23-Dec-2009 in Royal Holloway Research Online.Last modified on 23-Dec-2009
Accepted for publication in Geophysical Research Letters volume 29. Copyright 2002 American Geophysical Union. Further reproduction or electronic distribution is not permitted.
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