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

Yuan, Cheng; Lau, William K. M.; Li, Zhanqing; Cribb, Maureen

doi:https://doi.org/10.5194/acp-19-1901-2019

Articles | Volume 19, issue 3

https://doi.org/10.5194/acp-19-1901-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-1901-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 3

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, William K. M. Lau, Zhanqing Li, and Maureen Cribb

Supplement

https://doi.org/10.5194/acp-19-1901-2019-supplement

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.