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Impact of moisture variations on the circulation of the south-west monsoon

Kishtawal, CM and Pal, PK and Narayanan, MS and Manna, SK and Sharma, OP and Agarwal, Sangeeta and Upadhyaya, HC (1993) Impact of moisture variations on the circulation of the south-west monsoon. In: Proceedings of the Indian Academy of Sciences - Earth & Planetary Sciences, 102 (4). pp. 507-519.

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Abstract

The impact of moisture anomalies on the circulation of the south-west Indian monsoon has been studied with a general circulation model. Newtonian relaxation is adopted to subject the model atmosphere under sustained moisture anomalies. The impact of negative anomalies of moisture was seen as a divergent circulation anomaly, while the positive anomaly was a stronger convergent anomaly. Although the humidity fields display a resilient behaviour, and relax back to normal patterns 1–2 days after the forcing terms in humidity are withdrawn, the circulation anomalies created by the moisture variation keeps growing. A feedback between positive moisture anomalies and low level convergence exists, which is terminated in the absence of external forcings.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: LMD-GCM - nudging - moisture anomalies
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 10 Feb 2011 06:43
Last Modified: 10 Feb 2011 06:43
URI: http://eprints.iisc.ernet.in/id/eprint/35493

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