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Trends in the rainfall pattern over India

Guhathakurta, P and Rajeevan, M (2008) Trends in the rainfall pattern over India. International Journal of Climatology, 28 (11). pp. 1453-1469.

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New monthly, seasonal and annual rainfall time series of 36 meteorological subdivisions of India were constructed using the monthly rainfall data for the period 1901-2003 of fixed network of 1476 rain gauge stations. In the new network, on an average, there is one rain gauge station for every 3402 Sq km area. The new rainfall series is temporally as well as spatially homogenous. Linear trend analysis was carried out to examine the long-term trends in rainfall over different subdivisions and monthly contribution of each of the monsoon months to annual rainfall. During the south-west monsoon season, three subdivisions viz. Jharkhand, Chattisgarh, Kerala showed significant decreasing trend and eight subdivisions viz. Gangetic WB, West UP, Jammu and Kashmir, Konkan and Goa, Madhya Maharashtra subdivision, Rayalseema, Coastal AP and North Interior Karnataka showed significant increasing trends. It has been found that the contribution of June, July and September rainfall to annual rainfall is decreasing for few subdivisions while contribution of August rainfall is increasing in few other subdivisions. EOF analysis is also done to know the spatial distribution of rainfall. The all India Monthly, seasonal and annual rainfall series constructed based on the 1476 stations are also reported.

Item Type: Article
Additional Information: Copyright of this article belongs to The Royal Meteorological Society
Uncontrolled Keywords: Gages; Meteorological instruments; Network protocols; Precipitation (meteorology); Rain gages; Sensor networks; Size distribution; Time series analysis, Annual rainfall; EOF analysis; Homogeneous; Jammu and Kashmir; Karnataka; Long-term trends; Monsoon season; Rain gauges; Rainfall data; Rainfall patterns; Rainfall series; Rainfall time series; Spatial distribution of; Time-series; Trend; Trend analysis, Rain, annual variation; monsoon; precipitation assessment; precipitation intensity; rainfall; raingauge; seasonal variation; spatial distribution; spatial variation; trend analysis, Asia; Eurasia; India; South Asia
Subjects: Meteorology and Climatology
Depositing User: Administrator ePrints@MoES
Date Deposited: 11 Jun 2016 08:51
Last Modified: 11 Jun 2016 08:51

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