Tuesday, 25 October 2016

Simulated Impact of Intensification of Irrigation on Indian Monsoon Rainfall and Surface Fluxes

Agriculture, human health, major weather and climate phenomenon are impacted by climate change. Indian subcontinent is home to one-sixth of world population, where the Indian summer monsoon rainfall (ISMR) is important for irrigation activities.

Indian Monsoon Rainfall
Within India, there is also evidence that intensive irrigation has led to changes in monsoon rainfall patterns with Lohar and Pal reporting that doubling of the area covered by summer paddy crops in West Bengal is a possible cause for mean monthly rainfall from 1983-1992, less than half that observed from 1973-1982.

The two-dimensional numerical simulations indicate that wetter soils along the coast reduce the temperature gradient between the land and the sea, hence reducing the intensity of sea breeze circulations and, therefore, lead to diminished pre-monsoon rainfall.

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