通过大气观测推断中国二氯甲烷排放量的快速增加。
Rapid increase in dichloromethane emissions from China inferred through atmospheric observations.
机构信息
College of Environmental Sciences and Engineering, Peking University, Beijing, China.
School of Chemistry, University of Bristol, Bristol, UK.
出版信息
Nat Commun. 2021 Dec 14;12(1):7279. doi: 10.1038/s41467-021-27592-y.
With the successful implementation of the Montreal Protocol on Substances that Deplete the Ozone Layer, the atmospheric abundance of ozone-depleting substances continues to decrease slowly and the Antarctic ozone hole is showing signs of recovery. However, growing emissions of unregulated short-lived anthropogenic chlorocarbons are offsetting some of these gains. Here, we report an increase in emissions from China of the industrially produced chlorocarbon, dichloromethane (CHCl). The emissions grew from 231 (213-245) Gg yr in 2011 to 628 (599-658) Gg yr in 2019, with an average annual increase of 13 (12-15) %, primarily from eastern China. The overall increase in CHCl emissions from China has the same magnitude as the global emission rise of 354 (281-427) Gg yr over the same period. If global CHCl emissions remain at 2019 levels, they could lead to a delay in Antarctic ozone recovery of around 5 years compared to a scenario with no CHCl emissions.
随着《蒙特利尔议定书》对消耗臭氧层物质的成功实施，大气中消耗臭氧层物质的含量继续缓慢下降，南极臭氧空洞也呈现出恢复的迹象。然而，不受管制的短寿命人为氯碳化合物排放量的增加抵消了其中的一些收益。在这里，我们报告了中国工业生产的氯碳化合物二氯甲烷（CHCl）排放量的增加。排放量从 2011 年的 231（213-245）Gg yr 增加到 2019 年的 628（599-658）Gg yr，平均年增长率为 13（12-15）%，主要来自中国东部。同期，中国 CHCl 排放量的总体增长与全球 354（281-427）Gg yr 的排放量增长相同。如果全球 CHCl 排放量保持在 2019 年的水平，与没有 CHCl 排放的情况相比，这可能导致南极臭氧恢复延迟约 5 年。
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