Strong control of effective radiative forcing by the spatial pattern of absorbing aerosol

Andrew I.L. Williams*, Philip Stier, Guy Dagan, Duncan Watson-Parris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Over the coming decades, it is expected that the spatial pattern of anthropogenic aerosol will change dramatically and the global aerosol composition will become relatively more absorbing. Yet, the climatic impact of this evolving spatial pattern of absorbing aerosol has received relatively little attention, in particular its impact on global-mean effective radiative forcing. Here, using model experiments, we show that the effective radiative forcing from absorbing aerosol varies strongly depending on their location, driven by rapid adjustments of clouds and circulation. Our experiments generate positive effective radiative forcing in response to aerosol absorption throughout the midlatitudes and most of the tropical regions, and a strong ‘hot spot’ of negative effective radiative forcing in response to aerosol absorption over the tropical Western Pacific. Further, these diverse responses can be robustly attributed to changes in atmospheric dynamics and highlight the importance of this ‘aerosol pattern effect’ for transient forcing from regional biomass-burning aerosol.

Original languageAmerican English
Pages (from-to)735-742
Number of pages8
JournalNature Climate Change
Volume12
Issue number8
DOIs
StatePublished - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

Fingerprint

Dive into the research topics of 'Strong control of effective radiative forcing by the spatial pattern of absorbing aerosol'. Together they form a unique fingerprint.

Cite this