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@ARTICLE{Asutosh:902560,
author = {Asutosh, Acharya and Fadnavis, Suvarna and Nuncio, M. and
Müller, Rolf and Tripathy, Sarat C.},
title = {{T}he {A}rctic {T}emperature {R}esponse to {G}lobal and
{R}egional {A}nthropogenic {S}ulfate {A}erosols},
journal = {Frontiers in Environmental Science},
volume = {9},
issn = {2296-665X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2021-04359},
pages = {766538},
year = {2021},
abstract = {The mechanisms behind Arctic warming and associated climate
changes are difficult todiscern. Also, the complex local
processes and feedbacks like
aerosol-cloud-climateinteractions are yet to be quantified.
Here, using the Community Earth System Model(CAM5)
experiments, with emission enhancement of anthropogenic
sulfate 1) five-foldglobally, 2) ten-times over Asia, and 3)
ten-times over Europe we show that regionalemissions of
sulfate aerosols alter seasonal warming over the Arctic,
i.e., colder summerand warmer winter. European emissions
play a dominant role in cooling during the summerseason (0.7
K), while Asian emissions dominate the warming during the
winter season(maximum ∼0.6 K) in the Arctic surface. The
cooling/warming is associated with a negative/positive cloud
radiative forcing. During the summer season increase in
low–mid levelclouds, induced by sulfate emissions, favours
the solar dimming effect that reduces thedownwelling
radiation to the surface and thus leads to surface cooling.
Warmer winters areassociated with enhanced high-level clouds
that induce a positive radiative forcing at thetop of the
atmosphere. This study points to the importance of
international strategies beingimplemented to control sulfate
emissions to combat air pollution. Such strategies will
alsoaffect the Arctic cooling/warming associated with a
cloud radiative forcing caused bysulfate emission change.},
cin = {IEK-7},
ddc = {333.7},
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:000721053800001},
doi = {10.3389/fenvs.2021.766538},
url = {https://juser.fz-juelich.de/record/902560},
}