Role of the cloud adjustment time scale in simulation of the interannual variability of Indian summer monsoon

Jain, Deepesh Kumar and Chakraborty, Arindam and Nanjundiah, Ravi S (2013) Role of the cloud adjustment time scale in simulation of the interannual variability of Indian summer monsoon. In: METEOROLOGY AND ATMOSPHERIC PHYSICS, 122 (3-4). pp. 159-173.

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Abstract

The simulation of precipitation in a general circulation model relying on relaxed mass flux cumulus parameterization scheme is sensitive to cloud adjustment time scale (CATS). In this study, the frequency of the dominant intra-seasonal mode and interannual variability of Indian summer monsoon rainfall (ISMR) simulated by an atmospheric general circulation model is shown to be sensitive to the CATS. It has been shown that a longer CATS of about 5 h simulates the spatial distribution of the ISMR better. El Nio Southern Oscillation-ISMR relationship is also sensitive to CATS. The equatorial Indian Ocean rainfall and ISMR coupling is sensitive to CATS. Our study suggests that a careful choice of CATS is necessary for adequate simulation of spatial pattern as well as interannual variation of Indian summer monsoon precipitation.

Item Type:	Journal Article
Publication:	METEOROLOGY AND ATMOSPHERIC PHYSICS
Publisher:	SPRINGER WIEN
Additional Information:	copyright for this article belongs to SPRINGER WIEN, AUSTRIA
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	23 Dec 2013 05:23
Last Modified:	23 Dec 2013 05:23
URI:	http://eprints.iisc.ac.in/id/eprint/47961

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