Abstract

The response of the Black Sea upper layer to the quasitropical cyclone on September 25–29, 2005 is studied using the coupled model consisting of the WRF atmosphere model, NEMO ocean model, and OASIS coupler. The circulation arising in the sea under the influence of the quasitropical cyclone is considered. It is demonstrated how sea surface temperature varied under the cyclone during its evolution and movement. The possible mechanisms of the significant (by >10°С) temperature drop under the cyclone are analyzed. It is shown that the main reason for the sea surface cooling is upwelling, i.e., the cold water lifting from the thermocline to the sea surface, and heat exchange with the atmosphere has an insignificant effect on the temperature variation. It is also demonstrated that the value of the sea surface temperature anomaly simulated by the coupled modeling is consistent with observational data much better than the results of atmospheric reanalysis and marine reprocessing.

中文翻译：

---

2005年9月25日至29日，黑海上层对气旋通道的响应

摘要

利用由WRF大气模型，NEMO海洋模型和OASIS耦合器组成的耦合模型，研究了2005年9月25-29日黑海上层对准热带气旋的响应。考虑了在准热带气旋的影响下海中的循环。结果表明，在旋风的演变和运动过程中，海面温度如何变化。分析了旋风分离器下温度明显下降（> 10°С）的可能机理。结果表明，造成海面冷却的主要原因是上升流，即冷水从温跃层升至海面，与大气的热交换对温度变化的影响很小。