文献类型：期刊文献

英文题名：Influence of sequential tropical cyclones on phytoplankton blooms in the northwestern South China Sea

作者：Wang Tongyu[1];Zhang Shuwen[2,3];Chen Fajin[1];Ma Yonggui[1];Jiang Chen[1];Yu Jie[1]

机构：[1]Guangdong Ocean Univ, Coll Oceanog & Meteorol, Zhanjiang 524000, Peoples R China;[2]Shantou Univ, Inst Marine Sci, Shantou 515063, Peoples R China;[3]Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266000, Peoples R China

年份：2021

卷号：39

期号：1

起止页码：14

外文期刊名：JOURNAL OF OCEANOLOGY AND LIMNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000527509100002)、、Scopus(收录号：2-s2.0-85084082284)、WOS

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

语种：英文

外文关键词：sequential tropical cyclones; two phytoplankton blooms; tropical cyclones induced upwelling; turbulence mixing by the near-inertial baroclinic shear instability

外文摘要：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 data. We 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 cyclones. The upper ocean cooling reached 2-5 degrees C with a right-side bias was observed along the typhoon track to about 200 km. The 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 cyclones. The first 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 upwelling. The 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 days. The measured mean eddy diffusivity in the upper ocean was above 10(-4) m(2)/s after typhoon Nesat. Enhancement 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.