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Characteristic features of winter precipitation and its variability over northwest India

Yadav, RK and Rupa Kumar, K and Rajeevan, M (2012) Characteristic features of winter precipitation and its variability over northwest India. Journal of Earth System Science, 121 (3). pp. 611-623.

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Northwestern parts of India receive considerable amount of precipitation during the winter months of December-March. Although, it is only about 15 of the annual precipitation, the precipitation is very important for rabi crops and to maintain the glaciers extend in the Himalaya, which melt and supply water to the rivers during other seasons. The precipitation is mainly associated with the sequence of synoptic systems known as 'western disturbances'. The precipitation has considerable spatial and temporal variability, with maximum precipitation occurring particularly over northern hilly regions, with decreasing influence southwards. The spatially coherent winter precipitation series has been prepared for the largest possible area comprising nine meteorological subdivisions of northwest India, which constitute about 32 of the total area of the country, having similar precipitation characteristics. The precipitation series has been statistically analysed to understand its characteristics and variability. The seasonal precipitation series is found to be homogeneous, Gaussian (normal) distributed and free from persistence. The precipitation variability has increased during the most recent three decades with more excess and deficient years.

Item Type: Article
Additional Information: Copyright of this article Indian Academy of Sciences.
Uncontrolled Keywords: climate effect; crop production; glacier; precipitation (climatology); precipitation assessment; seasonal variation; spatial variation; synoptic meteorology; temporal variation; winter, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 25 Dec 2013 07:50
Last Modified: 25 Dec 2013 07:50

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