About Me
Hello! I am Rajat, a PhD candidate in the Program in Atmospheric and Oceanic Sciences at Princeton University, advised by Dr. Rong Zhang. I have a broad interest in the field of climate dynamics and my PhD thesis, focuses on investigating the teleconnection mechanisms associated with the weakening of the Atlantic Meridional Overturning Circulation (AMOC). To investigate these teleconnections, I typically analyse the model output from the idealised hosing experiments conducted using the Geophysical Fluid Dynamics Laboratory high-resolution fully coupled climate model. Besides my thesis project, I am also interested in research problems related to extreme weather events such as tropical cyclones (intense ones called as hurricanes), extratropical storms, heat waves, and atmospheric rivers.
Before coming to Princeton, I completed my Master’s in Climate Science at the Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, where I worked with Prof. V. Venugopal. My master’s thesis looked at how Indian monsoon floods evolve on sub-seasonal timescales during La Niña and non-La Niña years.
Research Highlights

Schematic of the thermodynamic process sustaining warming at upper troposphere/lower stratosphere and cooling at middle/lower troposphere over the extratropical North Pacific in response to the North Atlantic biases. (Joshi & Zhang, 2023)

The Atlantic Extratropical-tropical Teleconnection in Response to the Weakening of AMOC (Joshi & Zhang, 2025)
Time Evolution (Jun 1st to Sep 30th) of Cumulative of Daily Rainfall Anomaly for Two Different Types of Monsoon Floods (La Niña Floods on left and No-La Niña Floods on right)
Publications
Peer-Reviewed
- Joshi, R., Zhang, R. On the Atlantic extratropical-tropical teleconnection in response to external freshater forcing. accepted npj Climate and Atmospheric Science (2025).
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Joshi, R., Zhang, R. Impacts of the North Atlantic biases on the upper troposphere/lower stratosphere over the extratropical North Pacific.
npj Climate and Atmospheric Science 6(1) 151 (2023).
https://doi.org/10.1038/s41612-023-00482-4
GFDL Research Highlight Climate.Gov News and Features
Submitted
- Joshi, R., Jyoti, P.J. and V. Venugopal (202X). Interhemispheric footrprint on Indian Monsoon Floods. submitted
In Preparation
- Joshi, R., Zhang, R. (202X). Boreal winter North Atlantic-North Pacific teleconnection associated with substantial weakening of AMOC. in prep