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CLIMATE CHANGE PROJECTIONS AND IMPACTS ON THAR DESERT ECOSYSTEM

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Title CLIMATE CHANGE PROJECTIONS AND IMPACTS ON THAR DESERT ECOSYSTEM
Not Available
 
Creator A.S.Rao
Surendra Poonia
Seema Choudhary
 
Subject Climate change
Impacts on Fauna
Thar desert region
 
Description Not Available
Thar desert region of India, which extends in more than 2.0 lakh sq. km area, experiences variable
rainfall from 100 mm to 450 mm in a year. Frequent drought, which occurs once in 2 or 3 years in the region,
causes extreme stress to fauna due to limited seasonal grazing resources. Besides xerophytic type of ecosystem, the fauna in Thar desert is subjected to extreme diurnal and seasonal variation in temperatures ranging as low as -5OC in winter to a high of +49OC in summer, causing thermal stress to the fauna. The Inter-Governmental Panel on Climate Change (IPCC, 2007) projected for hotter days and warm nights and a reduction in rainfall in Thar region by 21st century. Such projected climate change results in shifting rainfall pattern, higher temperatures, more demand for water and will be significant driver of biodiversity with changing life cycles, loss, migration and invasion of new habitat in Thar region. The present study on annual rainfall and temperature for Thar region showed by the end of 21st century, an increase in temperature by +3.8 OC at Bikaner, +3.6OC at Jaisalmer, +2.8OC at Jodhpur and +2.3OC at Pali, if the present rate of warming continues. Similarly, though there was no significant rise (@ 0.56 mm/year) in the annual rainfall of 12 arid districts of western Rajasthan, the annual rainfall is likely to be increased by +40 mm at Bikaner, +119 mm at Jaisalmer, -13 mm at Jodhpur and +43 mm at Pali. The spatial and temporal variation in potential evapotranspiration requirement of Thar region ranged from 2.1 mm/day to 12.2 mm/day and on an annual basis between 1500 mm to 2220 mm. During monsoon season, the impact of elevated temperatures on water demand is expected to increase by 0.1 to 0.5 mm/day for 1OC rise, 0.3 to 1.1 mm/day for 2OC, 0.4 to 1.6 mm/day for 3OC rise and 0.6 to 2.1 mm/day for a 4OC rise in temperature. Such increased demand of water due to global warming will reduce the scarce water and feed resources of Thar region.
Not Available
 
Date 2020-12-10T09:12:08Z
2020-12-10T09:12:08Z
2012-06-30
 
Type Research Paper
 
Identifier Not Available
0972-1959
http://krishi.icar.gov.in/jspui/handle/123456789/43084
 
Language English
 
Relation Not Available;
 
Publisher G.K.V. Society Agra