% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@ARTICLE{Adcock:888594,
author = {Adcock, Karina E. and Fraser, Paul J. and Hall, Brad D. and
Langenfelds, Ray L. and Lee, Geoffrey and Montzka, Stephen
A. and Oram, David E. and Röckmann, Thomas and Stroh, Fred
and Sturges, William T. and Vogel, Bärbel and Laube,
Johannes C.},
title = {{A}ircraft‐based observations of ozone‐depleting
substances in the upper troposphere and lower stratosphere
in and above the {A}sian summer $monsoon\$},
journal = {Journal of geophysical research / D},
volume = {126},
number = {1},
issn = {2169-8996},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2020-05050},
pages = {e2020JD033137},
year = {2021},
abstract = {Recent studies show that the Asian Summer Monsoon
Anticyclone (ASMA) transports emissions from the rapidly
industrializing nations in Asia into the tropical upper
troposphere. Here we present a unique set of measurements on
over 100 air samples collected on multiple flights of the
M55 Geophysika high altitude research aircraft over the
Mediterranean, Nepal and northern India during the summers
of 2016 and 2017 as part of the European Union project
StratoClim. These air samples were measured for 27
ozone‐depleting substances (ODSs), many of which were
enhanced above expected levels, including the chlorinated
very short‐lived substances, dichloromethane (CH2Cl2),
1,2‐dichloroethane (CH2ClCH2Cl) and chloroform (CHCl3).
CH2Cl2 mixing ratios in the tropopause region were 65‐136
ppt in comparison to previous estimates of mixing ratios in
the tropical tropopause layer of 30‐44 ppt in 2013‐2014.
Backward trajectories, calculated with the trajectory module
of the chemistry‐transport model CLaMS and driven by the
ERA5 reanalysis, indicate possible source regions of CH2Cl2
in South Asia. We derived total Equivalent Chlorine (ECl),
and Equivalent Effective Stratospheric Chlorine (EESC) and
found that these quantities were substantially higher than
previous estimates in the literature. EESC at mean
age‐of‐air of 3 years based on the 2016 measurements was
1861‐1872 ppt in comparison to a previously estimated EESC
of 1646 ppt. Our findings show that the ASMA transports
larger than expected mixing ratios of long‐lived and very
short‐lived ODSs into the upper troposphere and lower
stratosphere, likely leading to an impact on the
stratospheric ozone layer.},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {2112 - Climate Feedbacks (POF4-211) / STRATOCLIM -
Stratospheric and upper tropospheric processes for better
climate predictions (603557) / EXC3ITE - EXploring
Chemistry, Composition and Circulation in the stratosphere
with Innovative TEchnologies (678904)},
pid = {G:(DE-HGF)POF4-2112 / G:(EU-Grant)603557 /
G:(EU-Grant)678904},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000616529300006},
doi = {10.1029/2020JD033137},
url = {https://juser.fz-juelich.de/record/888594},
}