Asian Summer Monsoon Anticyclone-The Primary Entryway for Chlorinated Very-Short-Lived Substances to the Stratosphere

被引：0

作者：

Liang, Qing ^{[1
]}

Newman, Paul A. ^{[1
]}

Fleming, Eric L. ^{[1
,2
]}

Lait, Leslie R. ^{[1
,2
]}

Atlas, Elliot ^{[3
]}

Pan, Laura ^{[4
]}

Kinnison, Doug ^{[4
]}

Western, Luke M. ^{[5
]}

Schauffler, Sue ^{[3
,4
]}

Smith, Katie ^{[3
,6
]}

Treadaway, Victoria ^{[3
,6
]}

Hendershot, Roger ^{[3
,4
]}

Donnelly, Stephen ^{[3
,7
]}

Lueb, Richard ^{[3
,4
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Sci Syst & Applicat Inc, Lanham, MD USA

[3] Univ Miami, Coral Gables, FL 33124 USA

[4] Natl Ctr Atmospher Res, Boulder, CO USA

[5] Univ Bristol, Bristol, England

[6] NOAA, Chem Sci Lab, Boulder, CO USA

[7] Ft Hays State Univ, Hays, KS USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2025年 / 52卷 / 03期

关键词：

dichloromethane; Asian summer monsoon; very-short-lived substances; ACCLIP; stratosphere; chlorine; CHLOROFORM EMISSIONS; UPPER TROPOSPHERE; TRANSPORT; OZONE; DEPLETION;

D O I：

10.1029/2024GL110248

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Rapid growing emissions of dichloromethane (CH2Cl2), a chlorinated very-short-lived substance (Cl-VSLS) and an ozone depleting substance (ODS), has raised concerns as this increase offset a part of the stratospheric chlorine (Cl) reduction due to decreasing long-lived ODSs. We have combined simulations of the two most abundant Cl-VSLSs, CH2Cl2 and chloroform (CHCl3) using the NASA GEOS Chemistry Climate Model (GEOSCCM) with Asian Summer Monsoon Chemical and CLimate Impact Project aircraft observations to examine transport of Cl-VSLSs to the stratosphere and to assess their contribution to total stratospheric Cl. With ongoing large emissions (total similar to 1,500 Gg yr-1), Cl-VSLSs add about 100 ppt Cl to the stratosphere between 2020 and 2022. The Asian Summer Monsoon plays a primary role in the troposphere-to-stratosphere transport of Cl-VSLSs and delivers double the amount to the stratosphere, about 200 ppt Cl in August 2022. The overall Cl-VSLSs impact on stratospheric chlorine (similar to 3.3%) and ozone (similar to 1 DU) remain small.

引用

页数：10

共 22 条

[21] Phosgene in the Upper Troposphere and Lower Stratosphere: A Market for Product Gas Injection Due to Chlorine-Containing Very Short Lived Substances
Harrison, Jeremy J.
Chipperfield, Martyn P.
Hossaini, Ryan
Boone, Christopher D.
Dhomse, Sandip
Feng, Wuhu
Bernath, Peter F.
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (02) : 1032 - 1039
[22] Atmospheric impacts of chlorinated very short-lived substances over the recent past - Part 1: Stratospheric chlorine budget and the role of transport
Bednarz, Ewa M.
Hossaini, Ryan
Chipperfield, Martyn P.
Abraham, N. Luke
Braesicke, Peter
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2022, 22 (16) : 10657 - 10676

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