Articles | Volume 22, issue 12
https://doi.org/10.5194/acp-22-7843-2022
https://doi.org/10.5194/acp-22-7843-2022
Research article
 | 
17 Jun 2022
Research article |  | 17 Jun 2022

Reduced surface fine dust under droughts over the southeastern United States during summertime: observations and CMIP6 model simulations

Wei Li and Yuxuan Wang

Data sets

CALIPSO Lidar Level 3 Tropospheric Aerosol Profiles NASA https://doi.org/10.5067/CALIOP/CALIPSO/CAL_LID_L3_Tropospheric_APro_CloudFree-Standard-V4-20

ERA5 hourly data on pressure levels from 1979 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.bd0915c6

Observed and simulated dust data W. Li https://doi.org/10.7910/DVN/XCLAOT

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Short summary
Fine dust is an important component of PM2.5 and can be largely modulated by droughts. In contrast to the increase in dust in the southwest USA where major dust sources are located, dust in the southeast USA is affected more by long-range transport from Africa and decreases under droughts. Both the transport and emissions of African dust are weakened when the southeast USA is under droughts, which reveals how regional-scale droughts can influence aerosol abundance through long-range transport.
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