Evaluation of precipitation simulations over Thailand using a WRF regional climate model

The Weather Research and Forecasting (WRF) model is widely used as a regional climate model for dynamical downscaling in many regions world-wide. This study evaluates the WRF model for regional climate applications over Thailand, focusing on simulated precipitation using various convective parameter...

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Main Authors: Chakrit Chotamonsak, Eric P. Salathe, Jiemjai Kreasuwan, Somporn Chantara
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/51349
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-513492018-09-04T06:13:56Z Evaluation of precipitation simulations over Thailand using a WRF regional climate model Chakrit Chotamonsak Eric P. Salathe Jiemjai Kreasuwan Somporn Chantara Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy The Weather Research and Forecasting (WRF) model is widely used as a regional climate model for dynamical downscaling in many regions world-wide. This study evaluates the WRF model for regional climate applications over Thailand, focusing on simulated precipitation using various convective parameterization schemes available in WRF. The NCEP/NCAR Reanalysis are used as forcing boundary data. The WRF simulations were performed at a 20-km grid spacing with an outer 60-km nest, to which the boundary forcing was applied. Experiments are presented for the year 2005 using four convective cumulus parameterization schemes, namely, BMJ (Betts-Miller-Janjic), GD (Grell-Devenyi), G3D (improved Grell-Denenyi) and KF (Kain-Fritsch) with and without nudging applied to the outermost nest. Results are evaluated both against station data and gridded observations. In general, the experiments with nudging perform better than un-nudged experiments and the BMJ cumulus scheme with nudging yields the smallest bias relative to observations. 2018-09-04T06:00:37Z 2018-09-04T06:00:37Z 2012-10-01 Journal 01252526 2-s2.0-84869077213 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84869077213&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51349
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
spellingShingle Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
Chakrit Chotamonsak
Eric P. Salathe
Jiemjai Kreasuwan
Somporn Chantara
Evaluation of precipitation simulations over Thailand using a WRF regional climate model
description The Weather Research and Forecasting (WRF) model is widely used as a regional climate model for dynamical downscaling in many regions world-wide. This study evaluates the WRF model for regional climate applications over Thailand, focusing on simulated precipitation using various convective parameterization schemes available in WRF. The NCEP/NCAR Reanalysis are used as forcing boundary data. The WRF simulations were performed at a 20-km grid spacing with an outer 60-km nest, to which the boundary forcing was applied. Experiments are presented for the year 2005 using four convective cumulus parameterization schemes, namely, BMJ (Betts-Miller-Janjic), GD (Grell-Devenyi), G3D (improved Grell-Denenyi) and KF (Kain-Fritsch) with and without nudging applied to the outermost nest. Results are evaluated both against station data and gridded observations. In general, the experiments with nudging perform better than un-nudged experiments and the BMJ cumulus scheme with nudging yields the smallest bias relative to observations.
format Journal
author Chakrit Chotamonsak
Eric P. Salathe
Jiemjai Kreasuwan
Somporn Chantara
author_facet Chakrit Chotamonsak
Eric P. Salathe
Jiemjai Kreasuwan
Somporn Chantara
author_sort Chakrit Chotamonsak
title Evaluation of precipitation simulations over Thailand using a WRF regional climate model
title_short Evaluation of precipitation simulations over Thailand using a WRF regional climate model
title_full Evaluation of precipitation simulations over Thailand using a WRF regional climate model
title_fullStr Evaluation of precipitation simulations over Thailand using a WRF regional climate model
title_full_unstemmed Evaluation of precipitation simulations over Thailand using a WRF regional climate model
title_sort evaluation of precipitation simulations over thailand using a wrf regional climate model
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84869077213&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/51349
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