混合层深度对热带气旋强度的影响

The Impact of Mixed Layer Depth on the Tropical Cyclone

利用建立的中尺度海气耦合模式进行一组敏感性试验,以考察初始混合层深度对热带气旋(TC)强度的影响。试验结果表明,初始混合层深度对TC最大强度和增强时间影响都较大。一般来说,初始混合层越深,模拟的TC最大强度越大,TC增强时间越长。另外,TC与混合层深度的关系并不是线性的。当混合层较浅时,TC强度对其变化更为敏感。

In order to explore the impact of the mixed layer depth on the tropical cyclone （TC）, some sensi- tivity tests have been conducted using a new coupled meso-scale ocean-atmosphere model. The result shows that the initial mixed layer depth has great impacts on both the maximum intensity and the enhance- ment time of TC. Generally speaking, the initial mixed layer gets deeper, the maximum intensity becomes greater, and the enhancement time becomes longer. In addition, the relationship between TC and mixed layer depth is nonlinear. When the mixed layer depth is shallower, the TC intensity is more sensitive to its changes.