Using the fast impact of anthropogenic aerosols on regional land temperature to constrain aerosol forcing

Zhaoyi Shen, Yi Ming, Isaac M. Held

Research output: Contribution to journalArticle

Abstract

Anthropogenic aerosols have been postulated to have a cooling effect on climate, but its magnitude remains uncertain. Using atmospheric general circulation model simulations, we separate the land temperature response into a fast response to radiative forcings and a slow response to changing oceanic conditions and find that the former accounts for about one fifth of the observed warming of the Northern Hemisphere land during summer and autumn since the 1960s. While small, this fast response can be constrained by observations. Spatially varying aerosol effects can be detected on the regional scale, specifically warming over Europe and cooling over Asia. These results provide empirical evidence for the important role of aerosols in setting regional land temperature trends and point to an emergent constraint that suggests strong global aerosol forcing and high transient climate response.

Original languageEnglish (US)
Article numbereabb5297
JournalScience Advances
Volume6
Issue number32
DOIs
StatePublished - Aug 2020

All Science Journal Classification (ASJC) codes

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