On the Spatio-Temporal Variations of the Tropopause Height over India and Indian Summer Monsoon Activity

J.R. Kulkarni; R.K. Verma

doi:10.1007/BF02656973

Impact Factor: 5.8

Volume 10 Issue 4

Oct. 1993

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1993 > 10(4): 481-488

On the Spatio-Temporal Variations of the Tropopause Height over India and Indian Summer Monsoon Activity

1.
Indian Institute of Tropical Meteorology, Pashan, Pune-411008, India,Indian Institute of Tropical Meteorology, Pashan, Pune-411008, India

doi: 10.1007/BF02656973

Abstract
References
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Abstract:
The spatio-temporal variation of the tropopause height (TH) over the Indian region (5°N-35°N, 70°E-95°E) has been studied using monthly mean TH data, for 22-year period, 1965 to 1986. The study revealed that the stations south of 20° showed maximum TH in April / May and minimum in September. This variation in TH has been attributed to the corresponding variation of average sea surface temperature (SST) over ± 20° latitudinal belt over Indian Ocean, Arabian Sea and Bay of Bengal. Further the stations north of 20°N showed maximum in June and minimum in October/ November. This maximum in TH has primarily been attributed to the increased insolation and convection. Furthermore it is noticed that the anomaly of TH moved northwards during the period April to July.The interannual variability of the Indian Summer Monsoon Activity (ISMA) has been studied in relation to all India mean TH (at 12 GMT) for six months April through September. The composites of mean TH for good and bad monsoon years showed that all India mean TH is statistically higher in good monsoon years than in bad monsoon years. The relationship between ISMA and all India mean May TH has been studied using the contingency table. The study suggested that the forecast of ISMA could be prepared using mean May TH.
- Tropopause height,
- Indian monsoon activity
References

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Manuscript History

Manuscript received: 10 October 1993

Manuscript revised: 10 October 1993

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

On the Spatio-Temporal Variations of the Tropopause Height over India and Indian Summer Monsoon Activity

1. Indian Institute of Tropical Meteorology, Pashan, Pune-411008, India,Indian Institute of Tropical Meteorology, Pashan, Pune-411008, India

Manuscript received: 1993-10-10
Manuscript revised: 1993-10-10

Abstract: The spatio-temporal variation of the tropopause height (TH) over the Indian region (5°N-35°N, 70°E-95°E) has been studied using monthly mean TH data, for 22-year period, 1965 to 1986. The study revealed that the stations south of 20° showed maximum TH in April / May and minimum in September. This variation in TH has been attributed to the corresponding variation of average sea surface temperature (SST) over ± 20° latitudinal belt over Indian Ocean, Arabian Sea and Bay of Bengal. Further the stations north of 20°N showed maximum in June and minimum in October/ November. This maximum in TH has primarily been attributed to the increased insolation and convection. Furthermore it is noticed that the anomaly of TH moved northwards during the period April to July.The interannual variability of the Indian Summer Monsoon Activity (ISMA) has been studied in relation to all India mean TH (at 12 GMT) for six months April through September. The composites of mean TH for good and bad monsoon years showed that all India mean TH is statistically higher in good monsoon years than in bad monsoon years. The relationship between ISMA and all India mean May TH has been studied using the contingency table. The study suggested that the forecast of ISMA could be prepared using mean May TH.

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