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Tellus B: Chemical and Physical Meteorology Volume 45, 1993 - Issue 3
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Original Articles

The atmospheric CH4 increase since the Last Glacial Maximum

JéÔme A. ChappellazNASA/Goddard Institute for Space Studies, 2880 Broadway, New York NY10025, USA;NASA/Goddard Space Flight Center, Code 916, Greenbelt MD 20771, USA
,
Inez Y. FungNASA/Goddard Institute for Space Studies, 2880 Broadway, New York NY10025, USA
&
Anne M. ThompsonCNRS Laboratoire de Glaciologie, BP 96, 38402 St Martin d’Heres Cedex, FRANCE.
Pages 228-241 | Received 27 Mar 1992, Accepted 09 Nov 1992, Published online: 18 Jan 2017
 

Abstract

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.

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