| Typhoon Winnie （1997） with a Very Large Eye： High Resolution Numerical Simulation |
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| 作者姓名： | ZHANG Qinghong GUO Chunrui |
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| 作者单位： | Department of Atmospheric Sciences School of Physics Peking University，Department of Atmospheric Sciences，School of Physics Peking University，Beijing 100871，Beijing 100871 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | Typhoon Winnie (1997) was one of the hurricanes that had extremely large eyewall ever recorded with a diameter of eyewall reaching 370 km. Using the Penn State University/National Center for Atmospheric Research mesoscale model MM5 with 3-km grid horizontal spacing on the finest nested mesh, Winnie was successfully simulated in terms of track, intensity, eye and concentric eyewalls. The dynamic and thermal structures of concentric eyewalls were studied based on the model output. It was found that the concentric eyewalls and their surrounding wind fields were asymmetric in observation as well as in simulation. Winnie's outer eyewall was associated with a maximum wind ring, a warm moist ring, and a high vorticity ring. The inner eyewall was associated with a secondary maximum wind ring and a warm moist ring. Upward motion dominated the whole layer of inner eyewall and the area above 2-km altitude of the outer eyewall. Downward motion was found inside the eye and the moat. Radial inflow happened in the boundary layer of the outer eyewall and the moat, but radial outflow dominated the middle and upper levels of the outer eyewall.
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| 关 键 词： | 1997年 温妮台风 特大台风眼 高分辨率数值模拟 |
| 收稿时间： | 2006/11/5 0:00:00 |
Typhoon Winnie (1997) with a Very Large Eye: High Resolution Numerical Simulation |
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| ZHANG Qinghong,GUO Chunrui.Typhoon Winnie (1997) with a Very Large Eye: High Resolution Numerical Simulation[J].Acta Meteorologica Sinica,2007,21(1):114-120. |
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| Authors: | ZHANG Qinghong and GUO Chunrui |
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| Institution: | Department of Atmospheric Sciences, School of Physics, Peking University, Beijing 100871 |
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| Abstract: | Typhoon Winnie (1997) was one of the hurricanes that had extremely large eyewall ever recorded with a diameter of eyewall reaching 370 km. Using the Penn State University/National Center for Atmospheric Research mesoscale model MM5 with 3-km grid horizontal spacing on the finest nested mesh, Winnie was successfully simulated in terms of track, intensity, eye and concentric eyewalls. The dynamic and thermal structures of concentric eyewalls were studied based on the model output. It was found that the concentric eyewalls and their surrounding wind fields were asymmetric in observation as well as in simulation. Winnie's outer eyewall was associated with a maximum wind ring, a warm moist ring, and a high vorticity ring. The inner eyewall was associated with a secondary maximum wind ring and a warm moist ring. Upward motion dominated the whole layer of inner eyewall and the area above 2-km altitude of the outer eyewall. Downward motion was found inside the eye and the moat. Radial inflow happened in the boundary layer of the outer eyewall and the moat, but radial outflow dominated the middle and upper levels of the outer eyewall. |
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| Keywords: | Winnie 1997 typhoon eye concentric eyewalls |
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