Scientist Profile

Ms. Chaitri Roy

: Scientist D

: +91-(0)20-25904843

: +91-(0)20-25865142

Email ID
: chaitri[dot]cat[at]tropmet[dot]res[dot]in

Atmospheric Chemistry and Modeling
Degree University Year Stream
Ph. D Savitribai Phule Pune University (SPPU) 2018-current Atmospheric and Space Sciences
M.Sc. University of Calcutta 2012 Chemistry
B.Sc. University of Calcutta 2010 Chemistry

 Dynamics and chemistry of the upper troposphere and lower stratosphere (UTLS)

 Ozone variability in the UTLS

 Variability of trace gases and aerosols, and their relation with Asian monsoon

 Chemistry climate modelling

Award Name Awarded By Awarded For Year
Fulbright Kalam Doctoral Fellowship The J. William Fulbright Foreign Scholarships Board (FSB), Washington D.C., U.S.A. and Department of Science & Technology, Ministry of Science & Technology, Government of India Excellence in scientific research 2020-2021
Roland Schlich travel grant European Geosciences Union To present paper at EGU general assembly 2020 2020
National Space Science Symposium (NSSS) Best Paper Award Pune University, ISRO and IUCAA Best Paper 2019
Best Presentation Award IITM, Pune & ICTP, Italy Best presentation 2016
Best Poster Award Indian Institute of Science, Bangalore Best poster presentation 2015
Year Designation Institute
2022-Present Scientist D Indian Institute of Tropical Meteorology, Pune
2018-2021 Scientist C Indian Institute of Tropical Meteorology, Pune
2014-2017 Scientist B Indian Institute of Tropical Meteorology, Pune
2012-2013 Trainee scientist Indian Institute of Tropical Meteorology, Pune

Research Highlight

Estimation of Stratospheric Intrusions During Indian Cyclones

Deep convection associated with tropical cyclones leads to stratosphere-troposphere exchange (STE), which affects the upper-tropospheric ozone concentrations in the vicinity of the cyclones. Using reanalysis data sets, aircraft observations, and model simulations, this study estimates the ozone enhancements over India caused by STE associated with North Indian Ocean (NIO) cyclones formed between 2007 and 2017. During the NIO cyclones, stratospheric ozone accounts for roughly 60% of the excess upper tropospheric ozone over India. Stratospheric intrusion caused by cyclones in the Bay of Bengal and the Arabian Sea affected the upper tropospheric ozone levels over North and South India, respectively. The stratospheric ozone was found to propagate downward into the troposphere, frequently reaching 600 hPa and, in some cases, the surface.

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