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.

中文翻译：

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更新了卤烃和其他弱大气吸收剂的全球变暖潜能值和辐射效率

摘要 人类活动导致许多气体（包括卤代烃）的大气浓度增加，并可能导致更多气体的排放。许多这些气体，按分子计，都是强大的温室气体，尽管在目前的浓度下，它们的气候影响处于所谓的弱极限（即，它们的影响与浓度成线性比例）。我们在 2013 年发表了关于大约 200 种此类化合物的辐射效率 (RE) 和全球变暖潜能值 (GWP) 的综合评论（Hodnebrog 等，2013，https://doi.org/10.1002/rog.20013）。在这里，我们提供了可用实验红外吸收光谱的化合物的更新 RE 和 GWP 值。更新的数字基于修订后的“平诺克曲线”，该曲线将 RE 作为波数的函数，现在还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 年审查和新的大气寿命文献（主要来自 WMO（2019））的基础上实施了大约 500 个吸收光谱。总的来说，之前评估的 60 种化合物的值基于额外的吸收光谱，42 种化合物的 RE 与我们之前的评估相差 > 10%。除了先前评估的化合物外，还提供了 400 多种化合物的新 RE 计算，并提供了总共约 250 种化合物的 GWP 计算。目前由卤烃和其他弱吸收剂引起的辐射强迫为 0.38 [0.33–0.43] W m-2，而 IPCC AR5 中的辐射强迫为 0.36 [0.32–0.40] W m-2（Myhre 等人，2013 年，