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首页> 外文期刊>Atmospheric chemistry and physics >Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015
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Atmospheric radiocarbon measurements to quantify CO2 emissions in the UK from 2014 to 2015

机译：大气的无线电金测量，2014年至2015年从英国量化CO2排放量

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We present Delta(CO2)-C-14 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 (CO2)-C-14 and cause a depletion in the observed Delta(CO2)-C-14 value. The observations are compared to simulated values. Two corrections need to be applied to radiocarbon-derived fossil fuel CO2 (ffCO(2)): one for pure (CO2)-C-14 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 (CO2)-C-14 emissions from nuclear sites. Over the study period of 2014-2015, the biospheric correction and the correction for nuclear (CO2)-C-14 emissions were similar at 0.34 and 0.25 ppm ffCO(2) equivalent, respectively. The observed ffCO(2) 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 ffCO(2) by deriving a constant ratio of CO enhancements to ffCO(2) 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 (CO2)-C-14 lead to a large overall uncertainty in the ffCO(2), being around 1.8 ppm compared to typical enhancements of 2 ppm.
机译：我们呈现Delta（CO2）-C-14观测和相关温室气体测量在爱尔兰（Mace Head，MHD）和英国东部的高大塔网站（Tacolneston，TAC）受到更强烈的影响化石燃料源。这些观察结果已经用于计算化石燃料源对大气二氧化碳摩尔分数的贡献;这可以完成，因为来自化石燃料的排放不含（CO2）-C-14并导致观察到的δ（CO2）-C-14值耗尽。将观察结果与模拟值进行比较。需要将两种校正应用于无线电金属化石燃料二氧化碳（FFCO（2））：用于核工业遗址的纯（CO2）-14排放，一个用于较老的生物学排放的同位素签名中的不平衡（异养呼吸中的呼吸和二氧化碳在大气中。发现两个站点的测量只有来自核遗址的（CO2）-C-14排放的略微影响。在2014 - 2015年的研究期间，生物校正和核（CO2）-C-14排放的校正分别在0.34和0.25ppm FFCO（2）等同。基于Edgar 2010自下而上的库存，TAC高塔网站的观察到的FFCO（2）与模拟值没有显着差异。我们探讨了使用高频Co观察作为FFCO（2）的示踪剂通过导出CO增强与英国化石燃料源混合的FFCO（2）比率的恒定比率。该比率被发现为5.7 ppb ppm（-1），接近使用库存预测的值和5.1 ppb ppm（-1）的大气模型。在英国东部的TAC遗址战略性地选择与污染源有一定距离，以便允许观察集成的空气群众。然而，与污染源的距离和（CO2）-C-14中的大量测量不确定性导致FFCO（2）的总体不确定性导致大约1.8ppm，与2ppm的典型增强相比约为1.8ppm。

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