气候变化领域集成服务门户(CCPortal): Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015

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DOI	10.5194/acp-19-14057-2019
	Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015
	Wenger A.; Pugsley K.; O'Doherty S.; Rigby M.; Manning A.J.; Lunt M.F.; White E.D.
发表日期	2019
ISSN	16807316
起始页码	14057
结束页码	14070
卷号	19 期号:22
英文摘要	We present δ14CO2 observations and related greenhouse gas measurements at a background site in Ireland (Mace Head, MHD) and a tall tower site in the east of the UK (Tacolneston, TAC) that is more strongly influenced by fossil fuel sources. These observations have been used to calculate the contribution of fossil fuel sources to the atmospheric CO2 mole fractions; this can be done, as emissions from fossil fuels do not contain δ14CO2 and cause a depletion in the observed δδ14CO2 value. The observations are compared to simulated values. Two corrections need to be applied to radiocarbon-derived fossil fuel CO2 (ffCO2): one for pure δ14CO2 emissions from nuclear industry sites and one for a disequilibrium in the isotopic signature of older biospheric emissions (heterotrophic respiration) and CO2 in the atmosphere. Measurements at both sites were found to only be marginally affected by δ14CO2 emissions from nuclear sites. Over the study period of 2014-2015, the biospheric correction and the correction for nuclear δ14CO2 emissions were similar at 0.34 and 0.25 ppm ffCO2 equivalent, respectively. The observed ffCO2 at the TAC tall tower site was not significantly different from simulated values based on the EDGAR 2010 bottom-up inventory. We explored the use of high-frequency CO observations as a tracer of ffCO2 by deriving a constant ratio of CO enhancements to ffCO2 ratio for the mix of UK fossil fuel sources. This ratio was found to be 5.7 ppb ppm-1, close to the value predicted using inventories and the atmospheric model of 5.1 ppb ppm-1. The TAC site, in the east of the UK, was strategically chosen to be some distance from pollution sources so as to allow for the observation of well-integrated air masses. However, this distance from pollution sources and the large measurement uncertainty in δ14CO2 lead to a large overall uncertainty in the ffCO2, being around 1.8 ppm compared to typical enhancements of 2 ppm. © 2019 Author(s).
语种	英语
scopus关键词	atmospheric pollution; carbon dioxide; carbon emission; fossil fuel; greenhouse gas; measurement method; pollutant source; radiocarbon dating; Connacht; Galway [(CNT) Connacht]; Ireland; Mace Head; United Kingdom
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144025
作者单位	School of Chemistry, University of Bristol, Bristol, BS8 1TS, United Kingdom; Met Office, Exeter, Devon, EX1 3PB, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom
推荐引用方式 GB/T 7714	Wenger A.,Pugsley K.,O'Doherty S.,et al. Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015[J],2019,19(22).
APA	Wenger A..,Pugsley K..,O'Doherty S..,Rigby M..,Manning A.J..,...&White E.D..(2019).Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015.Atmospheric Chemistry and Physics,19(22).
MLA	Wenger A.,et al."Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015".Atmospheric Chemistry and Physics 19.22(2019).