The Effect of Warm Water and Its Weak Negative Feedback on the Rapid Intensification of Typhoon Hato(2017)  

作　　者：HUO Zi-mo DUAN Yi-hong LIU Xin 霍子墨;端义宏;刘欣(State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081 China)

机构地区：[1]State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081 China

出　　处：《Journal of Tropical Meteorology》2020年第4期402-416,共15页热带气象学报（英文版）

基　　金：National Basic R&D Project(973 Program)of China(2015CB452805);National Natural Science Foundation of China(61827901);National Key R&D Program of China(2017YFC1501602);Open Research Program of the State Key Laboratory of Severe Weather(2019LASW-A08);Basic Research Fund of CAMS(2016Z003,2018Y013);Program of the National Satellite Meteorological Centre(FY3(02P)-MAS-1803)。

摘　　要：Typhoon Hato (2017) went through a rapid intensification (RI) process before making landfall in Zhuhai,Guangdong Province, as the observational data shows. Within 24 hours, its minimum sea level pressure deepened by35hPa and its maximum sustained wind speed increased by 20m s-1. According to satellite observations, Hato encountered a large area of warm water and two warm core rings before the RI process, and the average sea surface temperature cooling (SSTC) induced by Hato was only around 0.73℃. Air-sea coupled simulations were implemented to investigate the specific impact of the warm water on its RI process. The results showed that the warm water played an important role by facilitating the RI process by around 20%. Sea surface temperature budget analysis showed that the SSTC induced by mixing mechanism was not obvious due to the warm water. Besides, the cold advection hardly caused any SSTC, either. Therefore, the SSTC induced by Hato was much weaker compared with that in general cases. The negative feedback between ocean and Hato was restrained and abundant heat and moisture were sufficiently supplied to Hato. The warm water helped heat flux increase by around 20%, too. Therefore, the warm water influenced the structure and the intensity of Hato. Although there might be other factors that also participated in the RI process, this study focused on air-sea interaction in tropical cyclone forecast and discussed the impact of warm water on the intensity and structure of a tropical cyclone.

关 键 词：Typhoon Hato rapid intensification warm water air-sea coupled model sea surface temperature cooling 

分 类 号：P444[天文地球—大气科学及气象学]