Anthropogenic aerosol effects on tropospheric circulation and sea surface temperature (1980–2020): separating the role of zonally asymmetric forcings

Diao, Chenrui; Xu, Yangyang; Xie, Shang-Ping

doi:https://doi.org/10.5194/acp-21-18499-2021

Articles | Volume 21, issue 24

https://doi.org/10.5194/acp-21-18499-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-18499-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 24

Research article

|

21 Dec 2021

Research article |

| 21 Dec 2021

Anthropogenic aerosol effects on tropospheric circulation and sea surface temperature (1980–2020): separating the role of zonally asymmetric forcings

Chenrui Diao, Yangyang Xu, and Shang-Ping Xie

Data sets

CESM Large EnseThe Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability (https://www.cesm.ucar.edu/projects/community-projects/LENS/data-sets.html) J. E. Kay, C. Deser, A. Phillips, A. Mai, C. Hannay, G. Strand, J. M. Arblaster, S. C. Bates, G. Danabasoglu, J. Edwards, M. Holland, P. Kushner, J.-F. Lamarque, D. Lawrence, K. Lindsay, A. Middleton, E. Munoz, R. Neale, K. Oleson, L. Polvani, and M. Vertenstein https://doi.org/10.1175/BAMS-D-13-00255.1

Isolating the Evolving Contributions of Anthropogenic Aerosols and Greenhouse Gases: A New CESM1 Large Ensemble Community Resource (https://www.cesm.ucar.edu/working_groups/CVC/simulations/cesm1-single_forcing_le.html) Clara Deser, Adam S. Phillips, Isla R. Simpson, Nan Rosenbloom, Dani Coleman, Flavio Lehner, Angeline G. Pendergrass, Pedro DiNezio, and Samantha Stevenson https://doi.org/10.1175/JCLI-D-20-0123.1

Short summary

Anthropogenic aerosol (AA) emission has shown a zonal redistribution since the 1980s, with a decline in the Western Hemisphere (WH) high latitudes and an increase in the Eastern Hemisphere (EH) low latitudes. This study compares the role of zonally asymmetric forcings affecting the climate. The WH aerosol reduction dominates the poleward shift of the Hadley cell and the North Pacific warming, while the EH AA forcing is largely confined to the emission domain and induces local cooling responses.