This paper published in the Journal of Hydrology and Hydromechanics discusses the impacts of climate change on water resources in West Bengal. The authors use hydrological modeling to assess the effects of changing precipitation patterns on water availability.
Here are a few research papers and articles related to the climate of West Bengal: climate of west bengal
The transition from winter to summer is gradual, but by mid-March, the heat begins to rise significantly. This is also known as the pre-monsoon season. This paper published in the Journal of Hydrology