Articles | Volume 19, issue 3
Atmos. Chem. Phys., 19, 1901–1913, 2019
https://doi.org/10.5194/acp-19-1901-2019
Atmos. Chem. Phys., 19, 1901–1913, 2019
https://doi.org/10.5194/acp-19-1901-2019

Research article 12 Feb 2019

Research article | 12 Feb 2019

Relationship between Asian monsoon strength and transport of surface aerosols to the Asian Tropopause Aerosol Layer (ATAL): interannual variability and decadal changes

Cheng Yuan et al.

Data sets

The Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) (https://disc.sci.gsfc.nasa.gov/daac-bin/FTPSubset2.pl) R. Gelaro, W. McCarty, M. J. Suárez, R. Todling, A. Molod, L. Takacs, C. A. Randles, A. Darmenov, M. G. Bosilovich, R. Reichle, K. Wargan, L. Coy, R. Cullather, C. Draper, S. Akella, V. Buchard, A. Conaty, A. M. da Silva, W. Gu, G.-K. Kim, R. Koster, R. Lucchesi, D. Merkova, J. E. Nielsen, G. Partyka, S. Pawson, W. Putman, M. Rienecker, S. D. Schubert, M. Sienkiewicz, and B. Zhao https://doi.org/10.1175/JCLI-D-16-0758.1

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Short summary
Using MERRA-2 reanalysis daily data from 2001 to 2015, we found that during strong South Asian summer monsoon years, the Asian monsoon anticyclone is more expansive and shifted northward. All the CO, carbonaceous aerosols and dust are found to be more abundant in the Asian Tropopause Aerosol Layer (ATAL). ATAL trends are associated with increasing strength of the AMA, with earlier and enhanced vertical transport of ATAL constituents by enhanced overshooting convection over the transport regions.
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