Updated Global Warming Potentials and Radiative Efficiencies of Halocarbons and Other Weak Atmospheric Absorbers

IF 25.2 1区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Reviews of Geophysics Pub Date : 2020-07-09 DOI:10.1029/2019RG000691
?. Hodnebrog, B. Aamaas, J. S. Fuglestvedt, G. Marston, G. Myhre, C. J. Nielsen, M. Sandstad, K. P. Shine, T. J. Wallington
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引用次数: 35

Abstract

Human activity has led to increased atmospheric concentrations of many gases, including halocarbons, and may lead to emissions of many more gases. Many of these gases are, on a per molecule basis, powerful greenhouse gases, although at present-day concentrations their climate effect is in the so-called weak limit (i.e., their effect scales linearly with concentration). We published a comprehensive review of the radiative efficiencies (RE) and global warming potentials (GWP) for around 200 such compounds in 2013 (Hodnebrog et al., 2013, https://doi.org/10.1002/rog.20013). Here we present updated RE and GWP values for compounds where experimental infrared absorption spectra are available. Updated numbers are based on a revised “Pinnock curve”, which gives RE as a function of wave number, and now also accounts for stratospheric temperature adjustment (Shine & Myhre, 2020, https://doi.org/10.1029/2019MS001951). Further updates include the implementation of around 500 absorption spectra additional to those in the 2013 review and new atmospheric lifetimes from the literature (mainly from WMO (2019)). In total, values for 60 of the compounds previously assessed are based on additional absorption spectra, and 42 compounds have REs which differ by >10% from our previous assessment. New RE calculations are presented for more than 400 compounds in addition to the previously assessed compounds, and GWP calculations are presented for a total of around 250 compounds. Present-day radiative forcing due to halocarbons and other weak absorbers is 0.38 [0.33–0.43] W m−2, compared to 0.36 [0.32–0.40] W m−2 in IPCC AR5 (Myhre et al., 2013, https://doi.org/10.1017/CBO9781107415324.018), which is about 18% of the current CO2 forcing.

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最新的全球变暖潜势和卤代烃和其他弱大气吸收剂的辐射效率
人类活动已导致包括卤代烃在内的许多气体在大气中的浓度增加,并可能导致更多气体的排放。在每个分子的基础上,这些气体中的许多都是强大的温室气体,尽管在目前的浓度下,它们对气候的影响处于所谓的弱极限(即它们的影响与浓度成线性关系)。我们在2013年发表了一篇关于约200种此类化合物的辐射效率(RE)和全球变暖潜能值(GWP)的综合综述(Hodnebrog等人,2013,https://doi.org/10.1002/rog.20013)。在这里,我们给出了可获得实验红外吸收光谱的化合物的最新RE和GWP值。更新的数据是基于修订后的“平诺克曲线”,该曲线将RE作为波数的函数,现在也考虑了平流层温度调整(Shine &Myhre, 2020, https://doi.org/10.1029/2019MS001951)。进一步的更新包括在2013年审查中增加了约500个吸收光谱,并从文献(主要来自WMO(2019))中增加了新的大气寿命。总的来说,之前评估的60种化合物的值是基于额外的吸收光谱,42种化合物的REs与我们之前的评估相差10%。除了先前评估的化合物外,还提出了400多种化合物的新的可再生能源计算方法,并提出了总共约250种化合物的全球变暖潜能值计算方法。目前由卤代烃和其他弱吸收体引起的辐射强迫为0.38 [0.33-0.43]wm - 2,而IPCC AR5中为0.36 [0.32-0.40]wm - 2 (Myhre et al., 2013, https://doi.org/10.1017/CBO9781107415324.018),约为当前CO2强迫的18%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Reviews of Geophysics
Reviews of Geophysics 地学-地球化学与地球物理
CiteScore
50.30
自引率
0.80%
发文量
28
审稿时长
12 months
期刊介绍: Geophysics Reviews (ROG) offers comprehensive overviews and syntheses of current research across various domains of the Earth and space sciences. Our goal is to present accessible and engaging reviews that cater to the diverse AGU community. While authorship is typically by invitation, we warmly encourage readers and potential authors to share their suggestions with our editors.
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