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Present Research Interests:

  • Monsoon prediction using coupled models, decadal variability and prediction
  • Land surface processes and monsoon predictability (role of land surface processes on monsoon variability and prediction)
  • Extreme climate events (variability and prediction of extreme events like heavy rainfall events, droughts and heat waves).

Important Scientific Contributions

  • Contributed significantly for developing many application tools and prediction models for societal applications like long-range prediction models, gridded climate data sets and many other climate application products for regional climate services. These models and application tools are being used by the India Meteorological Department for operational use.
  • Development of advanced statistical prediction models for operational long range forecasts of monsoon seasonal rainfall (over India and four homogeneous regions) and the monsoon onset over Kerala.
  • Diagnostic studies on the Inter-annual variability of southwest and northeast monsoons (tele-connections) and associated physical processes.
  • Development of objective criteria for declaring the monsoon onset over Kerala and monitoring the active and break spells of the Indian summer monsoon.These criteria are being used by the India Meteorological Department for operational use.
  • Development of high resolution climate data sets like the high resolution gridded rainfall and temperature data sets. These data sets are extensively used by researchers around the Globe. There are more than 750 citations on these data sets.
  • Analysis of extreme climate events (intense precipitation events, monsoon droughts and heat waves) and understanding physical processes.
  • Understanding and development of prediction tools for Mesoscale weather systems over southeast India. Development of advanced prediction tool using hybrid method (dynamical and statistical) for prediction of thunderstorms and associated lightning over the SHAR (ISRO rocket launching site), which is being used by the ISRO for predictions.
  • Role of land surface processes on monsoon variability using observations and regional climate models, development of a high resolution land surface data set for applications on hydrology.
  • Analysis of active and break spells of the Indian monsoon, criteria for definition and its dynamics, extensively cited and used by researchers for studies on active and break spells of the Monsoon.
  • Analysis of three dimensional structure of clouds and its variability over the monsoon region using advanced satellite data sets.
  • Analysis of cloud-radiation interaction and cloud radiative forcing over the monsoon region using various satellite data sets. First time shown that cloud-radiation feedback is negative over the Asian Monsoon region.
  • Evaluation and understanding of predictability of the Indian monsoon in coupled climate models.

Honours and Recognitions

  • Fellow of the Indian Academy of Sciences (IASc)
  • Fellow of the Indian National Science Academy (INSA)
  • Fellow of the National Science Academy of India (NASI)
  • Member, International Academy of Astronautics (IIA)
  • High-level Adviser on Climate Services for the Commission on Climatology (CCl) of the World Meteorological Organization (WMO)
  • Member of the International WCRP CLIVAR (UN Organization) Asian-Australian Monsoon Panel (AAMP) (2007-2012)
  • Chairman, Council of the Regional Integrated Multi-Hazard Early Warning System (RIMES) For Africa and Asia, Bangkok.

  • Honorary Doctorate from GITAM University, Vishakapatnam
  • Chairman, Research Council, National Institute of Oceanography (NIO), Goa
  • Member, Governing Council of IISER Pune, IISER Tirupati and IISER Kolkata
  • Senior Associate, International Centre for Theoretical Physics (ICTP), Trieste, Italy, 2007-2013
  • Expert Member in the World Meteorological Organization (WMO) international panel on Climate Services Information System (CSIS) under the Global Framework on Climate Services (GFCS) (Since 2012)
  • Consultant to WMO to prepare the WMO Annual Climate Statement on the Status of Global Climate (in 2004 and 2005), only Asian to get this honour.
  • Associate Editor, Journal of Earth System Sciences, Indian Academy of Sciences, Bangalore, a Springer Publication (2007-2015).
  • Associate Editor, Weather and Climate Extremes, Elsevier  publication
  • Member, WMO CBS expert panel on long range forecasting, 2004-2008.
  • Chairman, Expert Team constituted by the ISRO on New Meteorological Satellite Systems and Applications.

Academic Activity

  • Ph.D Research Guide at the University of Pune, Andhra University and S.V.University, Tirupati.
  • Guided 9 Ph.D students, 5 M Tech students, and 10 M.Sc students for their research studies(list of the Ph.D students given below).

List of Ph.D. students completed:

·     

S.No. Name Year Title of Thesis University
1 R.K.Yadav 2006 Variability of Winter Precipitation Over North- West India: Teleconnections and Long Range Forecasting
University of Pune
(Co-Guide)
2 Pankaj Kumar 2006 Northeast Monsoon Rainfall Variability over India: Teleconnections and Long-Range Prediction
University of Pune
(Co-Guide)
3 G. Krishna Kumar 2007 Impacts of Sea Surface Temperatures over the Indian Ocean on the Indian Monsoons- with a special reference to recent El Ninos
University of Pune
(Co-Guide)
4 S. Balachandran 2007 Surface Radiative Budget and its Relationship With Cloud Properties over the Globe : An Analysis Of Satellite Data University of Pune
5 A.K.Srivastava 2011 Role of extra tropical circulation features in modulating Indian Summer Monsoon rainfall University of Pune
6 C.K.Unnikrishnan 2014 A study on role of Land Surface Processes on the Indian Summer monsoon variability using a regional climate model
S.V.University
Tirupati
7 A Madhulatha 2015 Numerical Simulation of Mesoscale Convective Systems and Development of prediction schemes Andhra University
8 Sreekala P.P. 2017 Northeast monsoon rainfall variability over south peninsular India in IPCC-AR5 models
S.V.University
Tirupati
9 Karuna Sagar 2017

Studies on Rainstorms over India: Observations and predictability

S.V. University
Tirupati