Long-Term Climate Variability and Drought Characteristics in Tropical Region of India

Vijay, Anjali, Sivan, Sruthi, Mudbhatkal, Amogh and Amai, Mahesha (2021) Long-Term Climate Variability and Drought Characteristics in Tropical Region of India. Journal of Hydrologic Engineering, 26 (4). 05021003-1. ISSN 1084-0699

Full content URL: https://ascelibrary.org/doi/10.1061/%28ASCE%29HE.1...

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Long-Term Climate Variability and Drought Characteristics in Tropical Region of India
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Abstract

This work reports climate change signals and long-term trend analysis of climate variables, meteorological drought, and extreme climate indexes over the tropical state of Kerala in India. The trend analysis reveals statistically significant decrease of annual and southwest monsoon rainfall (as much as 63 mm and 55 mm per decade, respectively). A decrease in number of annual rainy days (up to 2.8 days=decade) is also reported. Temperature trend analysis indicates an increasing trend with as high as 1.3°C=decade. The spatiotemporal variation of extreme climate indexes across Kerala shows a decreasing trend of extreme precipitation indexes and an increasing trend of extreme temperature indexes. R95 and R95p decreased in northern and southern Kerala whereas R5 index increased in central and southern regions. Warm days have significantly increased whereas cold days exhibit a decreasing trend across the state. The increase in warmer nights is statistically significant whereas colder nights are decreasing in central and southern regions. Meteorological drought using Standardized Precipitation Index (SPI) reveals increasing occurrence of droughts in Kerala with higher frequencies over southern and central Kerala.

Keywords:Climate variability, Climate indexes, Drought analysis, Kerala, Trend analysis
Subjects:F Physical Sciences > F640 Earth Science
F Physical Sciences > F860 Climatology
F Physical Sciences > F840 Physical Geography
F Physical Sciences > F852 Hydrology
H Engineering > H200 Civil Engineering
Divisions:College of Science > School of Geography
ID Code:44066
Deposited On:23 Feb 2021 15:25

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