Decadal variation in the heat and cold waves over India during 1971-2000

Authors

  • D. S. PAI
  • V. THAPLIYAL
  • P. D. KOKATE

DOI:

https://doi.org/10.54302/mausam.v55i2.1083

Keywords:

Decadal variation, Heat and Cold waves, Extreme events, Regional impact

Abstract

Using information regarding daily heat wave and cold wave conditions over all the meteorological sub-divisions of India for the period 1971-2000, the decadal changes in the various characteristics of heat wave (HW)/severe heat wave (SHW) and cold wave (CW)/severe cold wave (SCW) were examined. A significant increase was noticed in the frequency, persistency and spatial coverage of both of these high frequency temperature extreme events (heat and cold waves) during the decade (1991-2000). These changes might be the manifestation of regional impact of highest ever decadal scale global warming recorded during the period (1991-2000). A part of these changes might also be caused by local factors such as deforestation, urbanization etc.  The HW/SHW activity over most of the subdivisions were relatively less during the intermediate decadal period (1981-1990) as compared to that during the preceding (1971-1980) and succeeding (1991-2000) decadal periods. The CW/SCW activity over North India showed increase from the decade of seventies to eighties and then to nineties.  For other areas, the changes in the CW/SCW activity were similar to that of HW/SHW with the intermediate period having minimum activity compared to the other two periods. During the entire data period, three sub-divisions, namely Kerala, Lakshadweep and Andaman & Nicobar Islands did not experience any heat/cold wave conditions at all.

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Published

01-04-2004

How to Cite

[1]
D. S. PAI, V. THAPLIYAL, and P. D. KOKATE, “Decadal variation in the heat and cold waves over India during 1971-2000”, MAUSAM, vol. 55, no. 2, pp. 281–292, Apr. 2004.

Issue

Section

Research Papers

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