Dr. Satyaban Bishoyi Ratna is a Scientist-E at the India Meteorological Department (IMD), where he works in the Climate Research and Services division. His primary focus is on large-scale ocean-atmosphere interactions and their influence on climate variability. Dr. Ratna has a broad research background, having worked at global research institutions such as the Climatic Research Unit at the University of East Anglia (UK), JAMSTEC (Japan), and the Euro-Mediterranean Center on Climate Change (Italy).

His research interests include studying ocean-atmosphere interactions, such as the El Niño–Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), and their impact on regional climate variability. He has also explored the Atlantic Multidecadal Oscillation (AMO) and its effect on Asian climate.

In his current role at IMD, Dr. Ratna focuses on operational climate predictions and services, including seasonal climate forecasting for India, climate monitoring, and delivering climate outlook statements through the South Asian Climate Outlook Forum (SASCOF). His work supports national-level decision-making and risk management by providing seasonal forecasts for meteorological and hydrological services across South Asia.

Dr. Ratna holds an M.Sc in Oceanography, an M.Tech in Atmospheric Sciences, and a Ph.D. in Meteorology from Andhra University. His doctoral research focused on numerical modeling of Indian summer monsoon processes. He is also actively involved in teaching climate sciences and contributing to climate services in South Asia.