Aerosol-boundary-layer-monsoon interactions amplify semi-direct effect of biomass smoke on low cloud formation in Southeast Asia

Ke Ding, Xin Huang, Aijun Ding (), Minghuai Wang, Hang Su, Veli-Matti Kerminen, Tuukka Petäjä, Zhemin Tan, Zilin Wang, Derong Zhou, Jianning Sun, Hong Liao, Huijun Wang, Ken Carslaw, Robert Wood, Paquita Zuidema, Daniel Rosenfeld, Markku Kulmala, Congbin Fu, Ulrich Pöschl, Yafang Cheng () and Meinrat O. Andreae
Additional contact information
Ke Ding: Nanjing University
Xin Huang: Nanjing University
Aijun Ding: Nanjing University
Minghuai Wang: Nanjing University
Hang Su: Max Planck Institute for Chemistry
Veli-Matti Kerminen: University of Helsinki
Tuukka Petäjä: Nanjing University
Zhemin Tan: Nanjing University
Zilin Wang: Nanjing University
Derong Zhou: Nanjing University
Jianning Sun: Nanjing University
Hong Liao: Nanjing University of Information Science & Technology
Huijun Wang: Nanjing University of Information and Science Technology
Ken Carslaw: University of Leeds
Robert Wood: University of Washington
Paquita Zuidema: University of Miami
Daniel Rosenfeld: Nanjing University
Markku Kulmala: Nanjing University
Congbin Fu: Nanjing University
Ulrich Pöschl: Max Planck Institute for Chemistry
Yafang Cheng: Max Planck Institute for Chemistry
Meinrat O. Andreae: Max Planck Institute for Chemistry

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Low clouds play a key role in the Earth-atmosphere energy balance and influence agricultural production and solar-power generation. Smoke aloft has been found to enhance marine stratocumulus through aerosol-cloud interactions, but its role in regions with strong human activities and complex monsoon circulation remains unclear. Here we show that biomass burning aerosols aloft strongly increase the low cloud coverage over both land and ocean in subtropical southeastern Asia. The degree of this enhancement and its spatial extent are comparable to that in the Southeast Atlantic, even though the total biomass burning emissions in Southeast Asia are only one-fifth of those in Southern Africa. We find that a synergetic effect of aerosol-cloud-boundary layer interaction with the monsoon is the main reason for the strong semi-direct effect and enhanced low cloud formation in southeastern Asia.

Date: 2021
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DOI: 10.1038/s41467-021-26728-4

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