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@ARTICLE{Fadnavis:1028433,
author = {Fadnavis, Suvarna and Sonbawne, Sunil M. and Laakso, Anton
and Ploeger, Felix and Rap, Alexandru and Heinold, Bernd and
Sabin, T. P. and Müller, Rolf},
title = {{L}ong range transport of {S}outh and {E}ast {A}sian
anthropogenic aerosols counteracting {A}rctic warming},
journal = {npj climate and atmospheric science},
volume = {7},
number = {1},
issn = {2397-3722},
address = {London},
publisher = {Springer Nature},
reportid = {FZJ-2024-04614},
pages = {101},
year = {2024},
abstract = {The large-scale convection during the Asian summer monsoon
plays an important role in the rapidtransport of boundary
layer aerosols into the Asian summer monsoon anticyclone.
Here, using thestate-of-the-art ECHAM6–HAMMOZ
aerosol-chemistry-climate model, we show that these
aerosolsare further transported to the Arctic along
isentropic surfaces by the Brewer-Dobson-Circulation(BDC)
during the monsoon season. Our model simulations show that
East and South Asiananthropogenic emissions contribute
significantly to the aerosol transported to the Arctic,
whichcauses a higher negative net aerosol radiative forcing
at the surface (dimming) of −0.09 ± 0.02 Wm −2and
−0.07 ± 0.02 Wm −2 , respectively. Over the Arctic, the
East Asian anthropogenic aerosols thatinclude large amounts
of sulfate cause a seasonal mean net radiative forcing at
the top of theatmosphere (TOA) of −0.003 ± 0.001Wm −2
and a surface cooling of −0.56 K while the black
carbondominated aerosol from South Asia shows a positive TOA
forcing of +0.004 ± 0.001Wm −2 with an onlyminor surface
cooling of −0.043 K. Overall, the long-range transport of
South Asian aerosols results ina notably warming throughout
the atmospheric column but minimal temperature response at
the Arcticsurface. Conversely, East Asian aerosols cool the
troposphere and heat the lower stratosphere in theArctic.
The Asian aerosol thus plays an ambivalent role, with the
East Asian sources in particular havingthe potential to
counteract the rapid rise in Arctic temperatures and the
associated melting of snowand ice.},
cin = {IEK-7},
ddc = {530},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {2112 - Climate Feedbacks (POF4-211)},
pid = {G:(DE-HGF)POF4-2112},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001221690600002},
doi = {10.1038/s41612-024-00633-1},
url = {https://juser.fz-juelich.de/record/1028433},
}