Limited Sea Surface Temperature Cooling Due to the Barrier Layer Promoting Super Typhoon Mangkhut(2018)  

作　　者：Huipeng WANG Jiagen LI Junqiang SONG Liang SUN Fu LIU Han ZHANG Kaijun REN Huizan WANG Chunming WANG Jinrong ZHANG Hongze LENG 

机构地区：[1]College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410073,China [2]School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230000,China [3]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China [4]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China

出　　处：《Advances in Atmospheric Sciences》2024年第11期2156-2172,共17页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42176015);the National Natural Science Foundation of China(Grant No.41605070);the National Key Research and Development Program(Grant No.2021YFC3101500);the Hunan Provincial Natural Science Outstanding Youth Fund(Grant No.2023JJ10053);the Innovation Group Project of the Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)(Grant No.311022001);a project of the Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)(Grant No.SML2021SP207)。

摘　　要：This study investigates the impact of the salinity barrier layer(BL)on the upper ocean response to Super Typhoon Mangkhut(2018)in the western North Pacific.After the passage of Mangkhut,a noticeable increase(~0.6 psu)in sea surface salinity and a weak decrease(<1℃)in sea surface temperature(SST)were observed on the right side of the typhoon track.Mangkhut-induced SST change can be divided into the three stages,corresponding to the variations in BL thickness and SST before,during,and after the passage of Mangkhut.During the pre-typhoon stage,SST slightly warmed due to the entrainment of BL warm water,which suppressed the cooling induced by surface heat fluxes and horizontal advection.During the forced stage,SST cooling was controlled by entrainment,and the preexisting BL reduced the total cooling by 0.89℃ d-1,thus significantly weakening the overall SST cooling induced by Mangkhut.During the relaxation stage,the SST cooling was primarily caused by the entrainment.Our results indicate that a preexisting BL can limit typhoon-induced SST cooling by suppressing the entrainment of cold thermocline water,which contributed to Mangkhut becoming the strongest typhoon in 2018.

关 键 词：sea surface cooling mixed-layer depth barrier layer TYPHOON 

分 类 号：P732.3[天文地球—海洋科学]