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

作者：GENG Wu,CHENG Feng,XIE Qiang,ZOU Xiaoli,HE Weihong,WANG Zhaozheng,SHU Yeqiang,CHEN Gengxin,LIU Danian,YE Dong,WANG Ruiwen,LIU Chuanyu

摘要：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.

发文机构：State Key Laboratory of Tropical Oceanography China General Nuclear Power Laboratory for Regional Oceanography and Numerical Modeling Institute of Deep-sea Science and Engineering Center for Ocean Mega-Science Public Weather Service Center of China Meteorological Administration National Meteorological Center of China Meteorological Administration Key Laboratory of Ocean Circulation and Waves Marine Dynamic Process and Climate Function Laboratory

关键词：ASSIMILATIONobservationsystemsimulationexperiment(OSSE)ENSEMBLESouthChinaSea(SCS)Kalmanfilter

分类号： P73[天文地球—海洋科学]