The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols

The mechanisms behind Arctic warming and associated climate changes are difficult to discern. Also, the complex local processes and feedbacks like aerosol-cloud-climate interactions are yet to be quantified. Here, using the Community Earth System Model (CAM5) experiments, with emission enhancement o...

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Autores principales:	Acharya Asutosh, Suvarna Fadnavis, M. Nuncio, Rolf Müller, Sarat C. Tripathy
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	arctic temperature transport of sulfate aerosols cloud radiative forcing climate change arctic summer cooling and winter warming Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/47efa5ccc43f4b2d95ff3a95b5cb9257
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id	oai:doaj.org-article:47efa5ccc43f4b2d95ff3a95b5cb9257
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spelling	oai:doaj.org-article:47efa5ccc43f4b2d95ff3a95b5cb92572021-11-08T07:56:39ZThe Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols2296-665X10.3389/fenvs.2021.766538https://doaj.org/article/47efa5ccc43f4b2d95ff3a95b5cb92572021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenvs.2021.766538/fullhttps://doaj.org/toc/2296-665XThe mechanisms behind Arctic warming and associated climate changes are difficult to discern. Also, the complex local processes and feedbacks like aerosol-cloud-climate interactions are yet to be quantified. Here, using the Community Earth System Model (CAM5) experiments, with emission enhancement of anthropogenic sulfate 1) five-fold globally, 2) ten-times over Asia, and 3) ten-times over Europe we show that regional emissions of sulfate aerosols alter seasonal warming over the Arctic, i.e., colder summer and warmer winter. European emissions play a dominant role in cooling during the summer season (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 level clouds, induced by sulfate emissions, favours the solar dimming effect that reduces the downwelling radiation to the surface and thus leads to surface cooling. Warmer winters are associated with enhanced high-level clouds that induce a positive radiative forcing at the top of the atmosphere. This study points to the importance of international strategies being implemented to control sulfate emissions to combat air pollution. Such strategies will also affect the Arctic cooling/warming associated with a cloud radiative forcing caused by sulfate emission change.Acharya AsutoshAcharya AsutoshSuvarna FadnavisM. NuncioRolf MüllerSarat C. TripathyFrontiers Media S.A.articlearctic temperaturetransport of sulfate aerosolscloud radiative forcingclimate changearctic summer cooling and winter warmingEnvironmental sciencesGE1-350ENFrontiers in Environmental Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	arctic temperature transport of sulfate aerosols cloud radiative forcing climate change arctic summer cooling and winter warming Environmental sciences GE1-350
spellingShingle	arctic temperature transport of sulfate aerosols cloud radiative forcing climate change arctic summer cooling and winter warming Environmental sciences GE1-350 Acharya Asutosh Acharya Asutosh Suvarna Fadnavis M. Nuncio Rolf Müller Sarat C. Tripathy The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
description	The mechanisms behind Arctic warming and associated climate changes are difficult to discern. Also, the complex local processes and feedbacks like aerosol-cloud-climate interactions are yet to be quantified. Here, using the Community Earth System Model (CAM5) experiments, with emission enhancement of anthropogenic sulfate 1) five-fold globally, 2) ten-times over Asia, and 3) ten-times over Europe we show that regional emissions of sulfate aerosols alter seasonal warming over the Arctic, i.e., colder summer and warmer winter. European emissions play a dominant role in cooling during the summer season (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 level clouds, induced by sulfate emissions, favours the solar dimming effect that reduces the downwelling radiation to the surface and thus leads to surface cooling. Warmer winters are associated with enhanced high-level clouds that induce a positive radiative forcing at the top of the atmosphere. This study points to the importance of international strategies being implemented to control sulfate emissions to combat air pollution. Such strategies will also affect the Arctic cooling/warming associated with a cloud radiative forcing caused by sulfate emission change.
format	article
author	Acharya Asutosh Acharya Asutosh Suvarna Fadnavis M. Nuncio Rolf Müller Sarat C. Tripathy
author_facet	Acharya Asutosh Acharya Asutosh Suvarna Fadnavis M. Nuncio Rolf Müller Sarat C. Tripathy
author_sort	Acharya Asutosh
title	The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
title_short	The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
title_full	The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
title_fullStr	The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
title_full_unstemmed	The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols
title_sort	arctic temperature response to global and regional anthropogenic sulfate aerosols
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/47efa5ccc43f4b2d95ff3a95b5cb9257
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The Arctic Temperature Response to Global and Regional Anthropogenic Sulfate Aerosols

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