Long-term variations of surface air temperature during summer in India

被引:9
作者
Ganguly, Nandita D. [1 ]
Iyer, K. N. [2 ]
机构
[1] St Xavier Coll, Dept Phys, Ahmadabad 380009, Gujarat, India
[2] Saurashtra Univ, Dept Phys, Rajkot 360005, Gujarat, India
关键词
surface air temperature; stratospheric ozone; aerosol optical depth; solar irradiance; critical limits; TRENDS;
D O I
10.1002/joc.1748
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Increase in our earth's surface air temperature has been a subject of major concern in the recent years, as it may destroy the existing ecosystem and exert varied adverse effects on mankind and vegetation. In view of the gravity of the impending crises, the changes in surface air temperature during summer (March-June), their expected statistical critical limits and possible association with the changes in stratospheric ozone, aerosol concentration and solar irradiance have been investigated for different Indian regions over a period of 103 years from 1901 to 2003. It is observed that the overall air temperature is higher in the northwest (NW), north central (NC) and interior peninsula (IP) regions of India compared to the east coast (EC), west coast (WC), northeast (NE) and western Himalayan (WH) regions. However. the surface air temperature during summer is found to exhibit a small decreasing trend in the NW and WH regions and a small increasing trend in the IP, EC, NC, NE and WC regions. The results are discussed in light of observed decreasing trend in stratospheric column ozone (SCO), solar irradiance, concentration of aerosols and overall wind direction during summer. The maximum surface air temperatures for different Indian regions are observed to be well within the statistically computed critical limits. Copyright (C) 2008 Royal Meteorological Society
引用
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页码:735 / 746
页数:12
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