Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-26728-4
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Funding
- National Natural Science Foundation of China [41725020, 41922038]
- CSC-China Scholarship Council
- European Research Council [ATM-GTP 266 (742206)]
- Academy of Finland Center of Excellence in Atmospheric Sciences [272041]
- Academy of Finland Flagship Atmosphere and Climate Competence Center (ACCC)'' [337549]
- Fundamental Research Funds for the Central Universities [DLTD2107]
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The study shows that biomass burning aerosols significantly increase low cloud cover over subtropical southeastern Asia.
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. Biomass burning emissions have been shown to influence clouds in the Atlantic, but its influence in other regions is not well known. Here, the authors show that biomass burning aerosols increase the low-cloud cover over subtropical southeastern Asia by a similar magnitude than over the Atlantic.
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