Cite this paper:
GENG Wu, CHENG Feng, XIE Qiang, ZOU Xiaoli, HE Weihong, WANG Zhaozheng, SHU Yeqiang, CHEN Gengxin, LIU Danian, YE Dong, WANG Ruiwen, LIU Chuanyu. Observation system simulation experiments using an ensemble-based method in the northeastern South China Sea[J]. Journal of Oceanology and Limnology, 2020, 38(6): 1729-1745

Observation system simulation experiments using an ensemble-based method in the northeastern South China Sea

GENG Wu1, CHENG Feng2, XIE Qiang3,4,5, ZOU Xiaoli1, HE Weihong1, WANG Zhaozheng1, SHU Yeqiang1, CHEN Gengxin1, LIU Danian1, YE Dong6, WANG Ruiwen7, LIU Chuanyu8,9
1 State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences(SCSIO), Guangzhou 510301, China;
2 China General Nuclear Power, Yangjiang Nuclear Power Co., Ltd., Yangjiang 529941, China;
3 Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;
4 Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;
5 Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;
6 Public Weather Service Center of China Meteorological Administration, Beijing 100081, China;
7 National Meteorological Center of China Meteorological Administration, Beijing 100081, China;
8 Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences(IOCAS), Qingdao 266071, China;
9 Marine Dynamic Process and Climate Function Laboratory, Pilot National Laboratory for Marine Science and Technology(Qingdao)(QNLM), Qingdao 266237, China
Abstract:
An ensemble-based method for the observation system simulation experiment (OSSE) is employed to design optimal observation stations and assess the present observation stations in the northeastern South China Sea (SCS). We employed the 20-year (1992-2012) sea surface height (SSH) data to design an array to monitor the intraseasonal to interannual variability. The results show that the most key region was found located at the northwest of Luzon Island (LI) where the energetic Luzon cyclonic gyre (LCG) occurs; other key regions include the edge of the LCG, the northwest of the Luzon Strait (LS), and the southwest of Taiwan, China. By contrast, we found that the present observation stations might oversample at the northwest of the LS and undersample at the northwest of LI. In addition, the optimal stations perform better in a larger area than the present stations. In vertical direction, the key layer is located within the upper 200-m depth, of which the surface and subsurface layers are most valuable to the observing system.
Key words:    assimilation|observation system simulation experiment (OSSE)|ensemble|South China Sea (SCS)|Kalman filter   
Received: 2019-05-07   Revised: 2019-06-25
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Articles by GENG Wu
Articles by CHENG Feng
Articles by XIE Qiang
Articles by ZOU Xiaoli
Articles by HE Weihong
Articles by WANG Zhaozheng
Articles by SHU Yeqiang
Articles by CHEN Gengxin
Articles by LIU Danian
Articles by YE Dong
Articles by WANG Ruiwen
Articles by LIU Chuanyu
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