Asian summer monsoon anticyclone: trends and variability

Basha, Ghouse; Ratnam, M. Venkat; Kishore, Pangaluru

doi:https://doi.org/10.5194/acp-20-6789-2020

Articles | Volume 20, issue 11

https://doi.org/10.5194/acp-20-6789-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Interactions between aerosols and the South West Asian...

https://doi.org/10.5194/acp-20-6789-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 11

Research article

|

10 Jun 2020

Research article |

| 10 Jun 2020

Asian summer monsoon anticyclone: trends and variability

Ghouse Basha, M. Venkat Ratnam, and Pangaluru Kishore

Supplement

https://doi.org/10.5194/acp-20-6789-2020-supplement

Data sets

The NCEP/NCAR 40-years reanalysis project (https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.pressure.html) E. Kalnay, M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. Iredell, D. Saha, G. White, J. Woollen, Y. Zhu, M. Chelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K. C. Mo, C. Ropelewski, J. Wang, A. Leetma, R. Reynolds, and J. Dennis https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.pressure.html

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Short summary

This study explores the variability of the Asian summer monsoon anticyclone (ASMA) spatial variability and trends using long-term observational and reanalysis data sets. The decadal variability of the anticyclone is very large at the edges compared with the core region. We propose that the transport process over the Tibetan Plateau and the Indian region is significant in active monsoon, strong monsoon and strong La Niña years. Thus, different phases of the monsoon are important in UTLS analyses.