Structure, dynamics, and trace gas variability within the Asian summer monsoon anticyclone in the extreme El Niño of 2015–2016

Ravindra Babu, Saginela; Venkat Ratnam, Madineni; Basha, Ghouse; Pani, Shantanu Kumar; Lin, Neng-Huei

doi:https://doi.org/10.5194/acp-21-5533-2021

Articles | Volume 21, issue 7

https://doi.org/10.5194/acp-21-5533-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-5533-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 7

Research article

|

09 Apr 2021

Research article |

| 09 Apr 2021

Structure, dynamics, and trace gas variability within the Asian summer monsoon anticyclone in the extreme El Niño of 2015–2016

Saginela Ravindra Babu, Madineni Venkat Ratnam, Ghouse Basha, Shantanu Kumar Pani, and Neng-Huei Lin

Data sets

NASA GES DISK Aura MLS level 2 data NASA https://acdisc.gesdisc.eosdis.nasa.gov/data/Aura_MLS_ Level2/

CDAAC Data Products COSMIC Data Analysis and Archive Center http://cdaac-www.cosmic.ucar.edu/ cdaac/products.html

NCEP/DOE Reanalysis 2 NCEP-DOE http://www.cpc. ncep.noaa.gov/products/wesley/reanalysis2/kana/reanl2-1.html

ERA Interim ECMWF http://apps.ecmwf.int/datasets/data/ interim-full-daily/levtype=pl/

Monthly Niño 3.4 index data Climate Prediction Center http://www.cpc.ncep.noaa.gov

Short summary

The present study explores the detailed structure, dynamics, and trace gas variability in the Asian summer monsoon anticyclone (ASMA) in the extreme El Niño of 2015/16. The results find the structure of the ASMA shows strong spatial variability between July and August. A West Pacific mode of the anticyclone is noticed in August. A significant lowering of tropospheric tracers and strong increase in stratospheric tracers are found. The tropopause temperatures also exhibit a warming in the ASMA.