Infl uence of sequential tropical cyclones on phytoplankton blooms in the northwestern South China Sea

作     者：Tongyu WANG Shuwen ZHANG Fajin CHEN Yonggui MA Chen JIANG Jie YU Tongyu WANG;Shuwen ZHANG;Fajin CHEN;Yonggui MA;Chen JIANG;Jie YU

作者机构：College of Oceanography and MeteorologyGuangdong Ocean UniversityZhanjiang 524000China Institute of Marine ScienceShantou UniversityShantou 515063China Laboratory for Regional Oceanography and Numerical ModelingQingdao National Laboratory for Marine Science and TechnologyQingdao 266000China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2021年第39卷第1期

页      面：14-25页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 0713[理学-生态学] 

基　　金：Supported by the Basic Project of the Ministry of Science and Technology(No.2016YFC14001403) the National Program on Global Change and Air-Sea Interaction(No.GASI-IPOVAI-04) the National Science Foundation of China(Nos.41676008,40876005,U1901213) the Scientifi c Research Start-Up Foundation of Shantou University(No.NTF20006) 

主　　题：sequential tropical cyclones two phytoplankton blooms tropical cyclones induced upwelling turbulence mixing by the near-inertial baroclinic shear instability 

摘      要：Upper ocean responses to the passage of sequential tropical cyclones over the northwestern South China Sea(SCS)in 2011 were investigated using satellite remote sensing data,Argo reanalysis data,and an array of mooring *** found that the sea surface low temperature region lasted for more than 38 days and two phytoplankton blooms occurred after the passage of sequential tropical *** upper ocean cooling reached 2–5°C with a right-side bias was observed along the typhoon track to about 200 *** maintenance of low temperature region and the two phytoplankton blooms were mainly driven by upwelling and near-inertial turbulence mixing induced by the sequential tropical *** fi rst phytoplankton bloom appeared on the 7 th day after the passage of the three tropical cyclones,and the chlorophyll-a(chl-a)concentration increased by 226%,which may be mainly driven by typhoons induced *** second phytoplankton bloom occurred on the 30 th day,the chl-a concentration increased by 290%.Further analysis suggested that only the typhoons with similar characteristics as Nesat and Nalgae can induce strong near-inertial oscillation(NIO).Strong turbulent mixing associated with the near-inertial baroclinic shear instability lasted for 26 *** measured mean eddy diff usivity in the upper ocean was above 10-4 m 2/s after typhoon *** of the turbulent mixing in the upper ocean helped to transport nutrient-rich cold waters from the deep layer to the euphotic layer,and is a major mechanism for the long-term maintenance of low temperature region as well as the second phytoplankton bloom.