Some Studies on the Frequency of Extreme Weather Events over India

Authors
T. V. Lakshmi Kumar 1
H. Barbosa 2
K. Koteswara Rao 3
E. Prabha Jothi 4
1 Department of Physics, SRM University, Kattankulathur, India.
2 Universidade Federal de Alagoas – UFAL, Maceió, AL–Brasil.
3 Climatology and Hydrometeorology Division, Indian Institute of Tropical Meteorology, India.
4 Karnataka State Natural Disaster Monitoring Centre, Bangalore, India.
Abstract
The authors of the present paper studied some aspects of hydro and agrometeorological phenomena in terms of humidness, dryness and crop growing periods over India. Revised water balance model is used to obtain the above and the results are examined during the two half centuries i.e 1901 to 1950 and 1951 to 1995 in delineating the climate change impacts over India. Palmer Drought Severity Index (PDSI) for All India is related to aridity and humidity indices to understand the dry and wet spells over India. The paper also holds its stand on the analysis and the trends of thermo and hygric components such as precipitation, maximum and minimum temperatures, water need, actual evapotranspiration and soil moisture for All India. The return rates of All India maximum and minimum rainfall and temperatures are obtained for different time intervals using Extreme Value Analysis, that might be useful in assessing the impact and thereby to plan over the risk management for the better environmental and thus the human sustainability.

Keywords

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Journal of Agricultural Science and Technology
Volume 14, Issue 6
November and December 2012
Pages 1343-1356