Ja. Chappellaz et al., THE ATMOSPHERIC CH4 INCREASE SINCE THE LAST GLACIAL MAXIMUM, Tellus. Series B, Chemical and physical meteorology, 45(3), 1993, pp. 228-241
An estimate of the distribution of wetland area and associated CH, emi
ssion is presented for the Last Glacial Maximum (LGM, 18 kyr BP, kiloy
ear Before Present) and the Pre-Industrial Holocene (PIH, 9000-200 yea
rs BP). The wetland source, combined with estimates of the other bioge
nic sources and sink, yields total source strengths of 120 and 180 Tg
CH4/yr for LGM and PIH respectively. These source strengths are shown
to be consistent with source estimates inferred from a photochemical m
odel, and point to changes in wetland CH4 source as a major factor dri
ving the atmospheric CH4 increase from LGM to PIH.