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Effects of large-scale deforestation on precipitation in the monsoon regions: Remote versus local effects

Devaraju, N and Bala, Govindasamy and Modak, Angshuman (2015) Effects of large-scale deforestation on precipitation in the monsoon regions: Remote versus local effects. In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA , MAR 17 2015, pp. 3257-3262.

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Official URL: http://dx.doi.org/10.1073/pnas.1423439112

Abstract

In this paper, using idealized climate model simulations, we investigate the biogeophysical effects of large-scale deforestation on monsoon regions. We find that the remote forcing from large-scale deforestation in the northern middle and high latitudes shifts the Intertropical Convergence Zone southward. This results in a significant decrease in precipitation in the Northern Hemisphere monsoon regions (East Asia, North America, North Africa, and South Asia) and moderate precipitation increases in the Southern Hemisphere monsoon regions (South Africa, South America, and Australia). The magnitude of the monsoonal precipitation changes depends on the location of deforestation, with remote effects showing a larger influence than local effects. The South Asian Monsoon region is affected the most, with 18% decline in precipitation over India. Our results indicate that any comprehensive assessment of afforestation/reforestation as climate change mitigation strategies should carefully evaluate the remote effects on monsoonal precipitation alongside the large local impacts on temperatures.

Item Type: Conference Proceedings
Additional Information: Copy right for this article belongs to the NATL ACAD SCIENCES, 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
Keywords: deforestation; biogeophysical effects; Hadley Cell movement; ITCZ shift; monsoon regions
Department/Centre: Division of Mechanical Sciences > Divecha Centre for Climate Change
Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Depositing User: Id for Latest eprints
Date Deposited: 20 Apr 2015 11:00
Last Modified: 20 Apr 2015 11:00
URI: http://eprints.iisc.ac.in/id/eprint/51282

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