Sensitivity of modeled Indian monsoon to Chinese and Indian aerosol emissions

Sherman, Peter; Gao, Meng; Song, Shaojie; Archibald, Alex T.; Abraham, Nathan Luke; Lamarque, Jean-François; Shindell, Drew; Faluvegi, Gregory; McElroy, Michael B.

doi:https://doi.org/10.5194/acp-21-3593-2021

Articles | Volume 21, issue 5

https://doi.org/10.5194/acp-21-3593-2021

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

https://doi.org/10.5194/acp-21-3593-2021

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

Articles | Volume 21, issue 5

Research article

|

09 Mar 2021

Research article |

| 09 Mar 2021

Sensitivity of modeled Indian monsoon to Chinese and Indian aerosol emissions

Peter Sherman, Meng Gao, Shaojie Song, Alex T. Archibald, Nathan Luke Abraham, Jean-François Lamarque, Drew Shindell, Gregory Faluvegi, and Michael B. McElroy

Supplement

https://doi.org/10.5194/acp-21-3593-2021-supplement

Data sets

Terrestrial Air Temperature and Precipitation C. J. Willmott and K. Matsuura http://climate.geog.udel.edu/~climate/html_pages/README.ghcn_ts2.html

GPCC Full Data Monthly Product Version 2018 at 0.5° U. Schneider, A. Becker, P. Finger, A. Meyer-Christoffer, and M. Ziese https://doi.org/10.5676/DWD_GPCC/FD_M_V2018_050

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Short summary

The aims here are to assess the role of aerosols in India's monsoon precipitation and to determine the relative contributions from Chinese and Indian emissions using CMIP6 models. We find that increased sulfur emissions reduce precipitation, which is primarily dynamically driven due to spatial shifts in convection over the region. A significant increase in precipitation (up to ~ 20 %) is found only when both Indian and Chinese sulfate emissions are regulated.