M
M. Venkat Ratnam
Researcher at National Atmospheric Research Laboratory
Publications - 207
Citations - 3643
M. Venkat Ratnam is an academic researcher from National Atmospheric Research Laboratory. The author has contributed to research in topics: Stratosphere & Radiosonde. The author has an hindex of 26, co-authored 179 publications receiving 2801 citations. Previous affiliations of M. Venkat Ratnam include Kyoto University & Leipzig University.
Papers
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Nowcasting severe convective activity over southeast India using ground‐based microwave radiometer observations
TL;DR: In this article, the feasibility of nowcasting convective activity is examined by using thermodynamic indices derived from the ground-based microwave radiometer (MWR) observations located at a tropical station, Gadanki (13.5°N, 79.2°E).
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Identification of atmospheric boundary layer height over a tropical station using high-resolution radiosonde refractivity profiles: Comparison with GPS radio occultation measurements
Ghouse Basha,M. Venkat Ratnam +1 more
TL;DR: In this paper, an alternative method of detecting ABL height from refractivity (N) profiles is proposed, which includes both temperature and water vapor information, and several advantages were found.
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Historical and Projected Surface Temperature over India during the 20 th and 21 st century
Ghouse Basha,Pangaluru Kishore,M. Venkat Ratnam,Achuthan Jayaraman,Amir Agha Kouchak,Taha B. M. J. Ouarda,Taha B. M. J. Ouarda,Isabella Velicogna +7 more
TL;DR: Analysis of rare heat and cold events for 2080–2099 relative to a base period of 1986–2006 under RCP8.5 scenarios reveals that both are likely to increase substantially, however, by controlling the regional AA and LU change in India, a reduction in further warming over India region might be achieved.
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Global and Seasonal Variations of Stratospheric Gravity Wave Activity Deduced from the CHAMP/GPS Satellite
TL;DR: In this paper, the authors used radio occultation data from the Challenging Minisatellite Payload (CHAMP) satellite to analyze gravity wave (GW) activity in the stratosphere.
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BATAL: The Balloon measurement campaigns of the Asian Tropopause Aerosol Layer
Jean-Paul Vernier,T. D. Fairlie,Terry Deshler,M. Venkat Ratnam,Harish Gadhavi,B. Kumar,Murali Natarajan,A. K. Pandit,S.T. Akhil Raj,A. Hemanth Kumar,Achuthan Jayaraman,A. K. Singh,Neeraj Rastogi,P. R. Sinha,Sarvan Kumar,Shani Tiwari,Tobias Wegner,Noel C. Baker,Damien Vignelles,Georgiy L. Stenchikov,Illia Shevchenko,Jessica K. Smith,Kristopher M. Bedka,Amit P. Kesarkar,Vikas Singh,Jyoti Bhate,V. Ravikiran,M. Durga Rao,S. RavindraBabu,Anil Patel,Hazel Vernier,Frank G. Wienhold,Hongyu Liu,T. N. Knepp,Larry W. Thomason,James H. Crawford,Luke D. Ziemba,J. Moore,Suzanne Crumeyrolle,Martin S. Williamson,Gwenaël Berthet,Fabrice Jégou,Jean-Baptiste Renard +42 more
TL;DR: A series of field campaigns using balloon-borne instruments launched from India and Saudi Arabia during the summers 2014-2017 to study the nature, formation and impacts of the Asian Tropopause Aerosol Layer (ATAL) was conducted in this article.