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 climate modelling
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

Figure: Vertical cross-section of ozone anomaly (ppb) from the edges of anticyclone over NI and TP as seen from (a) ERA-Interim and, (b) ECHAM5-HAMMOZ. Black thick line indicates tropopause.

The stratospheric ozone rich cold intrusion during El‐Niño over the Indian region: implication during the Indian summer monsoon

We investigated ozone variability due to stratospheric intrusions in the upper troposphere over India and associated radiative impacts during monsoon breaks co‐occurring with El Niño using the ECHAM5‐HAMMOZ, Global‐Chemistry‐climate model simulations, and ERA‐Interim reanalysis data. During El Niño, deep stratospheric intrusions occur at the North India ‐ Tibetan Plateau region and the eastern edge of the monsoon anticyclone. The intrusions frequently penetrate deep into the troposphere which enhances the surface ozone levels by ~10–20 ppb and augments radiative forcing by ~0.33 W m−2 at the top of the atmosphere. (Roy et al., 2020,

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