| 摘要: |
| 利用中二层非线性原始方程海洋模式，研究海洋在自身不同热力结构下对热带气旋的响应。计算结果表明，初始混合层（ML）深度和层结强度对海表温（SST）和ML深度变化起着十分重要的作用。初始ML深度对海流量值影响较大，层结强度则较小。东海陆架区特殊的海洋热力结构，极易造成SST下降。海洋对7002号台风响应的模拟结果与观测资料较一致。 |
| 关键词: 海洋模式 热带气旋 数值计算 |
| DOI： |
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| 基金项目:国家“八五”科技攻关906项目07专题资助 |
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| STUDY ON THE RESPONSE OF OCEAN TO I TROPICAL CYCLONES II. THE CASE IN THE DIFFER.ENT OCEAN THERMAL STRUCTURES |
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Zhu Jianrong1, Qin Zenghao2
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1.Institute of Estuatine and Coastal Research,East China Normal University, Shanghai 200062;2.Shanghoi Typhoon Institute,Shanghai 200030
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| Abstract: |
| In the case of considering the ocean’s thermal structure, i. e., the ocean’s mixed layer (ML) depth, stratification intensity and the vertical lapse rate of the lower layer temperature, the two-layer nonlinear primitive equation ocean model described in Part I is applied to study the response of the ocean to a tropical cyclone (TC). Numerical experiments indicate that the initial ML depth and stratification intensity have a substantial impact on the changes of sea surface temperature (SST) and ML depth. The initial ML depth has a relatively large effect on the value of the current, whereas the initial stratification intensity has little influence on it. The distribution of ML depth in the East China Sea, especially the special thermal structure on the continental shelf facilitates the drop of SST.
Numerical simulation of the response of the ocean to the Typhoon 7002 was carried out by considering not only the moving speed, direction, position and intensity of Typhoon 7002, but also the real thermal structure of the ocean itself. Numerical calculation indicating that the scope, extent and shap of SST drop are fairly consistent with _the observation data, shows that the treatment of the physical processes of the ocean model are reasonable. |
| Key words: Ocean model, Tropical cyclone, Numerical calculation |
