| ZHAO Wei,GUAN Shoude,HONG Xin,LI Peiliang,TIAN Jiwei. 2011. Examination of wind-wave interaction source term in WAVEWATCH III with tropical cyclone wind forcing. Acta Oceanologica Sinica, (4):1－13 |
| Examination of wind-wave interaction source term in WAVEWATCH III with tropical cyclone wind forcing |
| Examination of wind-wave interaction source term in WAVEWATCH III with tropical cyclone wind forcing |
| Received:November 23, 2010 Revised:January 12, 2011 |
| DOI：10.1007/s13131-011-0128-1 |
| Key words:drag coefficient wind-wave interaction tropical cyclone WAVEWATCH Ⅲ |
| 中文关键词: drag coefficient wind-wave interaction tropical cyclone WAVEWATCH Ⅲ |
| 基金项目:The National Natural Science Foundation of China under contract No. 40706008; the Open Research Program of the Key Laboratory of Chinese Acadeing of Sciences for Tropical Marine Environmental Dynamics under contract No. LED0606; the Shandong Province Natural Science Foundation of China under contract No. Z2008E02; the National High Technology Research and Development Program ("863" Program) of China under contract No. 2008AA09A402. |
| Author Name | Affiliation | E-mail | | ZHAO Wei | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China | weizhao@ouc.edu.cn | | GUAN Shoude | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China | | | HONG Xin | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China | | | LI Peiliang | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China | | | TIAN Jiwei | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| Results of drag coefficient (CD) from field observations and laboratory wave tank experiments indicate that the operational wave model can overestimate wind energy input under high wind conditions. The wind-wave interaction source term in WAVEWATCH Ⅲ has been modified to examine its behavior with tropical cyclone wind forcing. Using high resolution wind input, numerical experiments under idealized wind field and tropical cyclone Bonnie (1998) were designed to evaluate performance of the modified models. Both experiments indicate that the modified models with reduced CD significantly decrease wind energy input into the wave model and then simulate lower significant wave height (SWH) than the original model. However, the effects on spatial distribution of SWH, mean wavelength, mean wave direction, and directional wave spectra are insignificant. Due to the reduced wind energy input, the idealized experiment shows that the modified models simulate lower SWH than the original model in all four quadrants. The decrease in the front quadrants is significantly larger than that in the rear quadrants; it is larger under higher winds than lower winds. The realistic experiment on tropical cyclone Bonnie shows that the modified model with the various downward trends of CD in high winds creates a simulation that agrees best with scanning radar altimeter observations. |
| 中文摘要: |
| Results of drag coefficient (CD) from field observations and laboratory wave tank experiments indicate that the operational wave model can overestimate wind energy input under high wind conditions. The wind-wave interaction source term in WAVEWATCH Ⅲ has been modified to examine its behavior with tropical cyclone wind forcing. Using high resolution wind input, numerical experiments under idealized wind field and tropical cyclone Bonnie (1998) were designed to evaluate performance of the modified models. Both experiments indicate that the modified models with reduced CD significantly decrease wind energy input into the wave model and then simulate lower significant wave height (SWH) than the original model. However, the effects on spatial distribution of SWH, mean wavelength, mean wave direction, and directional wave spectra are insignificant. Due to the reduced wind energy input, the idealized experiment shows that the modified models simulate lower SWH than the original model in all four quadrants. The decrease in the front quadrants is significantly larger than that in the rear quadrants; it is larger under higher winds than lower winds. The realistic experiment on tropical cyclone Bonnie shows that the modified model with the various downward trends of CD in high winds creates a simulation that agrees best with scanning radar altimeter observations. |
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