On the contribution of anthropogenic Cl to the increase in δ13C of atmospheric methane
作者： James S. Wang , Michael B. McElroy , Clarissa M. Spivakovsky , Dylan B. A. Jones
DOI: 10.1029/2001GB001572
关键词:
摘要: [1] A two-dimensional model is used to evaluate the impact of stratospheric chlorine on δ13C CH4 at surface and analyze sensitivity different chemical transport processes. It found that Cl depends relative strength lower upper branches circulation, which emphasize regions differing rates methane fractionation. estimated increase in concentrations associated with human activity has contributed most 0.54‰ 2‰ observed over past century. follows growth importance heavier sources (associated, for example, fossil fuels biomass burning) been largely responsible trend.
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