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Assessing fossil fuel CO₂ emissions in California using atmospheric observations and models

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Title: Assessing fossil fuel CO₂ emissions in California using atmospheric observations and models
Authors: Graven, H
Fischer, ML
Lueker, T
Jeong, S
Guilderson, TP
Keeling, RF
Bambha, R
Brophy, K
Callahan, W
Cui, X
Frankenberg, C
Gurney, K
LaFranchi, BW
Lehman, SJ
Michelson, H
Miller, JB
Newman, S
Paplawsky, W
Parazoo, NC
Sloop, C
Walker, SJ
Item Type: Journal Article
Abstract: 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.
Issue Date: 1-Jun-2018
Date of Acceptance: 11-Apr-2018
URI: http://hdl.handle.net/10044/1/59941
DOI: 10.1088/1748-9326/aabd43
ISSN: 1748-9326
Publisher: Institute of Physics (IoP)
Journal / Book Title: Environmental Research Letters
Volume: 13
Issue: 6
Copyright Statement: © 2018 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 631578
Keywords: Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Environmental Sciences
Meteorology & Atmospheric Sciences
Environmental Sciences & Ecology
carbon dioxide
fossil fuel emissions
atmospheric inversion
Meteorology & Atmospheric Sciences
Publication Status: Published
Open Access location: http://iopscience.iop.org/article/10.1088/1748-9326/aabd43
Article Number: ARTN 065007
Online Publication Date: 2018-05-31
Appears in Collections:Space and Atmospheric Physics
Faculty of Natural Sciences
Faculty of Engineering