Indian Institute of Technology Kharagpur |

My research goal is to study climate change and variability over the polar regions. I use reanalysis, observations and numerical models to understand the physical processes that drive climate change in the polar regions. The changes in the polar regions can have large impact on global atmosphere and climate. Improved representation of these processes in models can reduce uncertainty in future projections of global as well as regional climate.

Convective anomalies over tropical Pacific can induce large changes in the polar regions, through the generation of atmospheric Rossby waves. I study the dynamics of Rossby wave teleconnection using observation data and models.

The Himalaya-Hindu Kush region, also known as the water tower of Asia, consists of large number of glaciers. The meltwater from these glaciers feed the river basins and large irrigation systems downstream. Changing climate is already impacting the glacial dynamics and thermodynamics over the region. Given the complexity of the region and the lack of observation record, the evolution of Himalayan glaciers are not well understood. Moreover, cloud microphysics and hydrological impact of climate change over the Himalaya-Hindu Kush region is unclear. I plan to address some of these issues using proper field observations and regional climate models.

All Publications

Summer Drivers of Atmospheric Variability Affecting Ice Shelf Thinning in the Amundsen Sea Embayment, West Antarctica by Deb P., Orr A. , Bromwich D. H., Nicolas J. P., Turner J. , Hosking J. S. Geophysical Research Letters 45 4124-4133 (2018)
Effect of Pacific warm and cold events on the sea ice behavior in the Indian sector of the Southern Ocean by Deb P., Dash M. K., Pandey P. C. Deep Sea Research Part I: Oceanographic Research Papers 84 - (2014)
Absence of 21st century warming on Antarctic Peninsula consistent with natural variability by Turner J., Lu H. , White I. , King J. C., Phillips T. , Hosking J. S., Bracegirdle T. J., Marshall G. J., Mulvaney R. , Deb P. Nature 535 411-415 (2016)
An assessment of the Polar Weather Research and Forecast (WRF) model representation of near-surface meteorological variables over West Antarctica by Deb P., Orr A. , Hosking J. S., Phillips T. , Turner J. , Bannister D. , Pope J. O., Colwell S. Journal of Geophysical Research - Atmospheres 121 - (2016)
The extratropical linear step response to tropical precipitation anomalies and its use in constraining projected circulation changes under climate warming by Deb P., Matthews A.J., Joshi M.M., Senior N. Journal of Climate 33 7217-7231 (2020)
Relative Contribution of Atmospheric Drivers to Extreme Snowfall Over the Amundsen Sea Embayment by Swetha Chittella S.P., Deb P., Melchior van Wessem J. Geophysical Research Letters 49 - (2022)
Characteristics of Surface Melt Potential over Antarctic Ice Shelves based on Regional Atmospheric Model Simulations of Summer Air Temperature Extremes from 1979/80 to 2018/19. by Orr A., Deb P. , Et Al . Journal of Climate 36 3357-3383 (2023)
Sensitivity of simulated summer monsoonal precipitation in Langtang Valley, Himalaya to cloud microphysics schemes in WRF by Orr A., Listowski C. , Couttet M. , Collier E. , Immerzeel W. , Deb P. , Bannister D. Journal of Geophysical Research Atmospheres 122 6298-6318 (2017)
Origin and dynamics of global atmospheric wavenumber-4 in the Southern mid-latitude during austral summer by Senapati B., Deb P., Dash M.K., Behera S.K. Climate Dynamics - (2021)
Spatiotemporal Variability of Extreme Precipitation Events and Associated Atmospheric Processes Over Dronning Maud Land, East Antarctica by Simon S., Turner J., Thamban M., Wille J.D., Deb P. Journal of Geophysical Research: Atmospheres 129 - (2024)

Completed Projects

Co-Principal Investigator

Multidimensional Assessment of Ecological Dynamics and Ecosystem Health of Selected High Altitude Wetlands of Indian Himalayan Region for Effective Conservation and Management planning G.B. Pant National Institute of Himalayan Environment (NIHE)

Alumni members