The atmospheric CH4 increase since the Last Glacial Maximum: (1). Source estimates

J. A. Chappellaz, I. Y. Fung, A. M. Thompson

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An estimate of the distribution of wetland area and associated CH4 emission is presented for the Last Glacial Maximum (LGM, 18 kyr BP, kiloyear Before Present) and the Pre-Industrial Holocene (PIH, 9000-200 years BP). The wetland source, combined with estimates of the other biogenic 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 model, and point to changes in wetland CH4 source as a major factor driving the atmospheric CH4 increase from LGM to PIH. -Authors

Original languageEnglish (US)
Pages (from-to)228-241
Number of pages14
JournalTellus, Series B
Volume45 B
Issue number3
StatePublished - Jan 1 1993


All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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