Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Simulation of microphysical structure associated with tropical cloud clusters using mesoscale model and comparison with TRMM observations

Abhilash, S and Mohankumar, K and Das, S (2008) Simulation of microphysical structure associated with tropical cloud clusters using mesoscale model and comparison with TRMM observations. International Journal of Remote Sensing, 29 (8). pp. 2411-2432.

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Abstract

An attempt has been made in the present study to examine the microphysical structure of a non-squall Tropical Cloud Cluster (TCC). Three-dimensional model simulations of cloud microphysical structure associated with a non-squall TCC occurred on 26 October 2005 over the South Bay of Bengal have been carried out. The initial conditions for the model simulations were improved by incorporating upper air radiosonde observations and Indian Mesosphere Stratosphere Troposphere (MST) radar wind observations through analysis nudging. The horizontal and vertical distribution of the cloud hydrometeor fields observed from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) are compared to those simulated by a mesoscale model using a sophisticated microphysical scheme. Substantial differences are noticed in the amounts of cloud microphysical parameters, with simulated values of hydrometeors being higher than TMI retrievals. Spatial distribution of Cloud Liquid Water (CLW) and Rain Water (RNW) from TMI and model simulations correspond well with each other. The cloud microphysical structure during the initial and mature phases of the storm is also investigated. Comparisons of horizontal and vertical reflectivity structure from the TRMM-Precipitation Radar (PR) and those simulated by the model show reflectivity cores of values greater than 30 dBZ. The TRMM-PR echo tops are 3-4 km higher than the simulated echo tops. The 24 hr accumulated precipitation from model simulations are then verified with the combined rainfall product from the TRMM observations.

Item Type: Article
Additional Information: Copyright of this article belongs to Taylor and Francis.
Uncontrolled Keywords: Computer simulation; Mathematical models; Meteorological radar; Rain; Tropics; Troposphere; Upper atmosphere; Wind, Cloud liquid water (CLW); Mesosphere stratosphere troposphere (MST); Microphysical structure; Tropical cloud; Tropical rainfall measuring mission (TRMM), Clouds, cloud microphysics; hydrometeorology; mesoscale meteorology; mesosphere; radar imagery; radiosonde; reflectivity; simulation; spatial distribution; stratosphere; three-dimensional modeling; troposphere, Bay of Bengal; Indian Ocean
Subjects: Meteorology and Climatology
Depositing User: Administrator ePrints@MoES
Date Deposited: 17 Aug 2015 10:27
Last Modified: 17 Aug 2015 10:27
URI: http://moeseprints.incois.gov.in/id/eprint/2033

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