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Stratospheric zonal wind and temperature in relation to summer monsoon rainfall over India

Bansod, SD and Prasad, KD and Singh, SV (2000) Stratospheric zonal wind and temperature in relation to summer monsoon rainfall over India. Theoretical and Applied Climatology, 67 (3-4). pp. 115-121.

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The interannual variability of the Indian summer monsoon (June-September) rainfall is examined in relation to the stratospheric zonal wind and temperature fluctuations at three stations, widely spaced apart. The data analyzed are for Balboa. Ascension and Singapore, equatorial stations using recent period (1964-1994) data, at each of the 10.30 and 50 hPa levels. The 10hPa zonal wind for Balboa and Ascension during January and the 30 Hpa zonal wind for Balboa during April are found to be positively correlated with the subsequent Indian summer monsoon rainfall, whereas the temperature at 10 hPa for Ascension during May is negatively correlated with Indian Indian summer monsoon rainfall. The relationship with stratospheric temperatures appears to be the best, and is found to be stable over the period of analysis. Stratospheric temperature is also significantly correlated with the summer monsoon rainfall over a large and coherent region, in the north-west of India. Thus, the 10 Hpa temperature for Ascension in May appears to be useful for forecasting summer monsoon rainfall for not only the whole of India, but also for a smaller region lying to the north-west of India.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer
Uncontrolled Keywords: air temperature; monsoon; rainfall; summer; zonal wind, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 Mar 2015 18:37
Last Modified: 14 Mar 2015 18:37

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