文章基本信息

标题：Assessing fossil fuel CO2 emissions in California using atmospheric observations and models
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作者：H Graven ; M L Fischer ; T Lueker 等
期刊名称：Environmental Research Letters
印刷版ISSN：1748-9326
电子版ISSN：1748-9326
出版年度：2018
卷号：13
期号：6
页码：065007
DOI：10.1088/1748-9326/aabd43
语种：English
出版社：IOP Publishing Ltd
摘要：Analysis systems incorporating atmospheric observations could provide a powerful tool for validating fossil fuel CO₂ (ffCO₂) emissions reported for individual regions, provided that fossil fuel sources can be separated from other CO₂ sources or sinks and atmospheric transport can be accurately accounted for. We quantified ffCO₂ by measuring radiocarbon (¹⁴C) in CO₂, an accurate fossil-carbon tracer, at nine observation sites in California for three months in 2014–15. There is strong agreement between the measurements and ffCO₂ simulated using a high-resolution atmospheric model and a spatiotemporally-resolved fossil fuel flux estimate. Inverse estimates of total in-state ffCO₂ emissions are consistent with the California Air Resources Board's reported ffCO₂ emissions, providing tentative validation of California's reported ffCO₂ emissions in 2014–15. Continuing this prototype analysis system could provide critical independent evaluation of reported ffCO₂ emissions and emissions reductions in California, and the system could be expanded to other, more data-poor regions.