| Autor: |
Shaji, Ashish, Manoj, M. G., Johny, Kavya, S., Abhilash, Lee, Seoung-Soo |
| Zdroj: |
Modeling Earth Systems and Environment; 20240101, Issue: Preprints p1-15, 15p |
| Abstrakt: |
Prediction of thunderstorms with accurate space–time-intensity is still a challenging task in the tropical region. This paper examines the development of a pre-monsoon thunderstorm over a coastal urban city with an advanced 205 MHz VHF radar, and simulates the moist thermodynamical processes with the help of Weather Research and Forecasting model. The state-of-the-art VHF radar has been utilized to explore the dynamical features of the storm that occurred over Cochin, India on a typical pre-monsoon day. The thermodynamical processes have been simulated with different sets of microphysics-, cumulus-, and boundary layer- parameterization schemes. The performance of each combination of various parameterization schemes is examined in terms of correlation and standard deviation with the observations. Out of the 42 various combinations, it is found that the combination of Thompson microphysics-, Grell Freitas Ensemble cumulus-, and Meller Yamada Janjic planetary boundary layer- schemes is able to reproduce the moist thermodynamics better when compared with ground observations involving automatic weather station (AWS) and the VHF radar. The WRF model simulates the preconditioning of the atmosphere, mid-level blocking and release of convective instability, and moisture convergence in a reasonable manner. The identified physics suite is able to predict the storm development realistically and the study offers a reliable prospect of real-time prediction of thunderstorms over this region with the WRF model. |
| Databáze: |
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