AGAGE CH4 and CH3CCL3R. G. Prinn, R. F. Weiss, P. J. Fraser, P. G. Simmonds, D. O'Doherty, P. Salameh, L. Porter, P. Krummel, R. J. Wang, B. Miller, C. Harth, B. Greally, F. A. Van Woy, L. P. Steele, J. Mühle,
G. Sturrock, F. N. Alyea, J. Huang, and D. E. Hartley http://cdiac.esd.ornl.gov/ndps/alegage.html
Methane (CH4) is an important greenhouse gas. The growth of atmospheric CH4 stalled from 1999 to 2006, with current explanations focussed mainly on changing surface fluxes. We combine models with observations and meteorological data to assess the atmospheric contribution to CH4 changes. We find that variations in mean atmospheric hydroxyl concentration can explain part of the stall in growth. Our study highlights the role of multi-annual variability in atmospheric chemistry in global CH4 trends.
Methane (CH4) is an important greenhouse gas. The growth of atmospheric CH4 stalled from 1999 to...