Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea

Hua Zheng; Xiao-Hua Zhu; Hirohiko Nakamura; Jae-Hun Park; Chanhyung Jeon; Ruixiang Zhao; Ayako Nishina; Chuanzheng Zhang; Hanna Na; Ze-Nan Zhu; Hong-Sik Min

doi:10.1007/s13131-020-1603-3

Volume 39 Issue 7

Jul. 2020

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Article Navigation > Acta Oceanologica Sinica > 2020 > 39(7): 91-106

Hua Zheng, Xiao-Hua Zhu, Hirohiko Nakamura, Jae-Hun Park, Chanhyung Jeon, Ruixiang Zhao, Ayako Nishina, Chuanzheng Zhang, Hanna Na, Ze-Nan Zhu, Hong-Sik Min. Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea[J]. Acta Oceanologica Sinica, 2020, 39(7): 91-106. doi: 10.1007/s13131-020-1603-3

Citation:

Hua Zheng, Xiao-Hua Zhu, Hirohiko Nakamura, Jae-Hun Park, Chanhyung Jeon, Ruixiang Zhao, Ayako Nishina, Chuanzheng Zhang, Hanna Na, Ze-Nan Zhu, Hong-Sik Min. Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea[J]. Acta Oceanologica Sinica, 2020, 39(7): 91-106. doi: 10.1007/s13131-020-1603-3

Citation:

Hua Zheng, Xiao-Hua Zhu, Hirohiko Nakamura, Jae-Hun Park, Chanhyung Jeon, Ruixiang Zhao, Ayako Nishina, Chuanzheng Zhang, Hanna Na, Ze-Nan Zhu, Hong-Sik Min. Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea[J]. Acta Oceanologica Sinica, 2020, 39(7): 91-106. doi: 10.1007/s13131-020-1603-3

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Generation and propagation of 21-day bottom pressure variability driven by wind stress curl in the East China Sea

doi: 10.1007/s13131-020-1603-3

1.
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
2.
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
3.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
4.
Faculty of Fisheries, Kagoshima University, Kagoshima 8900056, Japan
5.
Department of Ocean Sciences, Inha University, Incheon 22212, Korea
6.
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge 02139, USA
7.
School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea
8.
Ocean Circulation and Climate Research Center, Korea Institute of Ocean Science and Technology, Busan 49111, Korea

Funds: The SIO group was supported by the National Natural Science Foundation of China under contract Nos 41920104006, 41806020, 41776107 and 41906024; the National Programme on Global Change and Air–Sea Interaction under contract No. GASIIPOVAI-01–02; the Scientific Research Fund of SIO under contract Nos JZ2001 and JT1801; the Project of State Key Laboratory of Satellite Ocean Environment Dynamics, SIO under contract Nos SOEDZZ1901 and SOEDZZ1903; the Kagoshima University group was supported by Core Research for Evolutional Science and Technology of the Japan Science and Technology Corporation and by JSPS KAKENHI under contract Nos JP15H05821 and JP15H03725; Jae-Hun Park, Hanna Na and Hong-Sik Min were supported by the “Study on Air–Sea Interaction and Process of Rapidly Intensifying Typhoon in the Northwestern Pacific” project funded by the Ministry of Oceans and Fisheries, Korea.

More Information

Corresponding author: E-mail: xhzhu@sio.org.cn
Received Date: 2020-03-06
Accepted Date: 2020-04-15

Available Online: 2020-12-28

Publish Date: 2020-07-25

Abstract

Abstract

Between June 2015 and June 2017, two pressure-recording inverted echo sounders (PIESs) and five current and pressure-recording inverted echo sounders (CPIESs) deployed along a section across the Kerama Gap acquired a dataset of ocean bottom pressure records in which there was significant 21-day variability (P_bot21). The P_bot21, which was particularly strong from July–December 2016, was coherent with wind stress curl (WSC) on the continental shelf of the East China Sea (ECS) with a squared coherence of 0.65 for a 3-day time lag. A barotropic ocean model demonstrated the generation, propagation, and dissipation of P_bot21. The modeled results show that the P_bot21 driven by coastal ocean WSC in the ECS propagated toward the Ryukyu Island Chain (RIC), while deep ocean WSC could not induce such variability. On the continental shelf, the P_bot21 was generated nearly synchronously with the WSC from the coastline to the southeast but dissipated within a few days due to the effect of bottom friction. The detection of P_bot21 by the moored array was dependent on the 21-day WSC patterns on the continental shelf. The P_bot21 driven southeast of the Changjiang Estuary by the WSC was detected while the P_bot21 generated northeast of the Changjiang Estuary was not.
- pressure-recording inverted echo sounder,
- East China Sea,
- bottom pressure, wind stress curl

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References(45)

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