| YANG Lei,WANG Dongxiao,PENG Shiqiu. 2012. Comparison between MM5 simulations and satellite measurements during Typhoon Chanchu (2006) in the South China Sea. Acta Oceanologica Sinica, (2):33－44 |
| Comparison between MM5 simulations and satellite measurements during Typhoon Chanchu (2006) in the South China Sea |
| Comparison between MM5 simulations and satellite measurements during Typhoon Chanchu (2006) in the South China Sea |
| Received:August 26, 2010 Revised:May 25, 2011 |
| DOI：10.1007/s13131-012-0190-3 |
| Key words:mesoscale model 5 TRMM QuikSCAT precipitation wind speed |
| 中文关键词: mesoscale model 5 TRMM QuikSCAT precipitation wind speed |
| 基金项目:The National Basic Research Program "973" program of China under contract Nos 2011CB403500 and 2011CB403504; the Chinese Academy of Sciences under contract No. KZCX2-YW-Y202; the National Natural Science Foundation of China under contract No. U0733002. |
| Author Name | Affiliation | E-mail | | YANG Lei | State Key Laboratory of Tropical Oceanography(LTO), the South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510301, China | | | WANG Dongxiao | State Key Laboratory of Tropical Oceanography(LTO), the South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510301, China | dxwang@scsio.ac.cn | | PENG Shiqiu | State Key Laboratory of Tropical Oceanography(LTO), the South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510301, China | |
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| Abstract: |
| The fifth Pennsylvania State University and National Center for Atmospheric Research mesoscale model (MM5) is utilized to study the precipitation and wind speed during Typhoon Chanchu (2006). Five model experiments with different physical parameterizations and sea surface temperature (SST) distributions are carried out. It is found that the control experiment configured with the Blakadar boundary scheme, Resiner2 moisture, the Betts-Miller cumulus scheme and daily updated SST has the most reasonable precipitation. The MRF boundary scheme tends to simulate a dryer boundary layer and stronger vertical mixing, which can greatly reduce the intensity of tropical cyclone (TC), resulting in a smaller maximum wind speed but larger range of medium wind speed (25-30 m/s). Constant SST through the TC cycle provides more energy from ocean surface, which could cause a significant increase in TC's intensity, thus resulting in the largest overestimation on rainfall and maximum wind speed. Longitudinally-uniform SST distribution before the rapid intensification could reduce TC's intensity and heat fluxes, which can partially compensate for the overestimation of precipitation in the control experiment. |
| 中文摘要: |
| The fifth Pennsylvania State University and National Center for Atmospheric Research mesoscale model (MM5) is utilized to study the precipitation and wind speed during Typhoon Chanchu (2006). Five model experiments with different physical parameterizations and sea surface temperature (SST) distributions are carried out. It is found that the control experiment configured with the Blakadar boundary scheme, Resiner2 moisture, the Betts-Miller cumulus scheme and daily updated SST has the most reasonable precipitation. The MRF boundary scheme tends to simulate a dryer boundary layer and stronger vertical mixing, which can greatly reduce the intensity of tropical cyclone (TC), resulting in a smaller maximum wind speed but larger range of medium wind speed (25-30 m/s). Constant SST through the TC cycle provides more energy from ocean surface, which could cause a significant increase in TC's intensity, thus resulting in the largest overestimation on rainfall and maximum wind speed. Longitudinally-uniform SST distribution before the rapid intensification could reduce TC's intensity and heat fluxes, which can partially compensate for the overestimation of precipitation in the control experiment. |
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