Chappellaz, Jérôme A.Fung, Inez Y.Thompson, Anne M.2024-07-262024-07-261993-01-01Chappellaz, Jérôme A., Inez Y. Fung, and Anne M. Thompson. “The Atmospheric CH₄ Increase since the Last Glacial Maximum: (1). Source Estimates” 45, no. 3 (January 1, 1993): 228-41. https://doi.org/10.3402/tellusb.v45i3.15726.https://doi.org/10.3402/tellusb.v45i3.15726http://hdl.handle.net/11603/35044An 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.14 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domainhttps://creativecommons.org/publicdomain/mark/1.0/Text