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Climate 2017, 5(1), 18; doi:10.3390/cli5010018

Long Term Spatiotemporal Variability in Rainfall Trends over the State of Jharkhand, India

Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Jharkhand Pin-826004, India
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Academic Editor: Yang Zhang
Received: 6 October 2016 / Revised: 23 February 2017 / Accepted: 24 February 2017 / Published: 2 March 2017
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Abstract

The current study was conducted to examine the impact of climate change on rainfall in Jharkhand state of India. It deals with the analysis of the historical spatiotemporal variability of rainfall on the annual, seasonal and monthly scale in 18 districts of the state Jharkhand over a period of 102 years (1901–2002). Mann-Kendall trend test and Sen’s slope method were applied to detect trends and the magnitude of change over the time period of 102 years (1901–2002). Mann Whitney Pettit’s method and Cumulative deviations test were applied for detection of shift point in the series. The results obtained year 1951 to be the most probable shift point in annual rainfall. The trend analysis along with the percent change for the data series before (1901–1951) and after the shift point (1952–2002) was also done. A significant downward rainfall trend was found in annual, monsoon and winter rainfall over the period of 102 years. The maximum decrease was found for the Godda (19.77%) and minimum at Purbi Singhbum station (1.95%). Trend analysis before shift point, i.e., during 1901–1951 showed an upward trend in annual rainfall and after shift point (1952–2002) a downward trend. The trend analysis for entire Jharkhand demonstrated a significant downward trend in annual and monsoon rainfall with a decrease of 14.11% and 15.65% respectively. A downward trend in seasonal rainfall will have a more pronounced effect on agricultural activities in the area as it may affect the growth phase of the kharif crops (May–October) in the region. View Full-Text
Keywords: Mann Kendall test; rainfall trends; Jharkhand; climate change Mann Kendall test; rainfall trends; Jharkhand; climate change
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Sharma, S.; Singh, P.K. Long Term Spatiotemporal Variability in Rainfall Trends over the State of Jharkhand, India. Climate 2017, 5, 18.

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