Rapid increase in dichloromethane emissions from China inferred through atmospheric observations.

Autor: An M; College of Environmental Sciences and Engineering, Peking University, Beijing, China.; School of Chemistry, University of Bristol, Bristol, UK., Western LM; School of Chemistry, University of Bristol, Bristol, UK., Say D; School of Chemistry, University of Bristol, Bristol, UK., Chen L; Meteorological Observation Centre of China Meteorological Administration (MOC/CMA), Beijing, China., Claxton T; Lancaster Environment Centre, Lancaster University, Lancaster, UK., Ganesan AL; School of Geographical Sciences, University of Bristol, Bristol, UK., Hossaini R; Lancaster Environment Centre, Lancaster University, Lancaster, UK.; Centre of Excellence in Environmental Data Science, Lancaster University, Lancaster, UK., Krummel PB; Climate Science Centre, CSIRO Oceans and Atmosphere, Aspendale, VIC, Australia., Manning AJ; Hadley Centre, Met Office, Exeter, UK., Mühle J; Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA., O'Doherty S; School of Chemistry, University of Bristol, Bristol, UK., Prinn RG; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, USA., Weiss RF; Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA., Young D; School of Chemistry, University of Bristol, Bristol, UK., Hu J; College of Environmental Sciences and Engineering, Peking University, Beijing, China. jianxin@pku.edu.cn., Yao B; Meteorological Observation Centre of China Meteorological Administration (MOC/CMA), Beijing, China. yaob@cma.gov.cn.; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, China. yaob@cma.gov.cn., Rigby M; School of Chemistry, University of Bristol, Bristol, UK. matt.rigby@bristol.ac.uk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Dec 14; Vol. 12 (1), pp. 7279. Date of Electronic Publication: 2021 Dec 14.
DOI: 10.1038/s41467-021-27592-y
Abstrakt: 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 (CH 2 Cl 2 ). The emissions grew from 231 (213-245) Gg yr -1 in 2011 to 628 (599-658) Gg yr -1 in 2019, with an average annual increase of 13 (12-15) %, primarily from eastern China. The overall increase in CH 2 Cl 2 emissions from China has the same magnitude as the global emission rise of 354 (281-427) Gg yr -1 over the same period. If global CH 2 Cl 2 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 CH 2 Cl 2 emissions.
(© 2021. The Author(s).)
Databáze: MEDLINE
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