Assimilation of surface currents into a regional model over Qingdao coastal waters of China

doi:10.1007/s13131-013-0328-y

	Assimilation of surface currents into a regional model over Qingdao coastal waters of China
	Zhao Jian 1; Chen Xueen 1; Xu Jiangling 2; Hu Wei 2; Chen Jinrui 1; Thomas, Pohlmann 3
刊名	ACTA OCEANOLOGICA SINICA
	2013-07
卷号	32 期号:7 页码:21-28
关键词	Qingdao coastal waters surface currents Ensemble Kalman filter Finite Volume Coastal Ocean Model (FVCOM)
ISSN号	0253-505X
DOI	10.1007/s13131-013-0328-y
英文摘要	Surface currents measured by high frequency (HF) radar arrays are assimilated into a regional ocean model over Qingdao coastal waters based on Kalman filter method. A series of numerical experiments are per formed to evaluate the performance of the data assimilation schemes. In order to optimize the analysis procedure in the traditional ensemble Kalman filter (ENKF), a different analysis scheme called quasiensemble Kaman filter (QENKF) is proposed. The comparisons between the ENKF and the QENKF suggest that both them can improve the simulated error and the spatial structure. The estimations of the background error covariance (BEC) are also assessed by comparing three different methods: Monte Carlo method; Canadian quick covariance (CQC) method and data uncertainty engine (DUE) method. A significant reduction of the root-mean-square (RMS) errors between model results and the observations shows that the CQC method is able to better reproduce the error statistics for this coastal ocean model and the corresponding external forcing. In addition, the sensibility of the data assimilation system to the ensemble size is also analyzed by means of different scales of the ensemble size used in the experiments. It is found that given the balance of the computational cost and the forecasting accuracy, the ensemble size of 50 will be an appropriate choice in the Qingdao coastal waters.
资助项目	BMBF-WTZ Project of China[CHN 09/031]
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000321808000004
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3959]
专题	自然资源部第一海洋研究所
作者单位	1.Ocean Univ China, Coll Phys & Environm Oceanog, Qingdao 266100, Peoples R China; 2.State Ocean Adm, North China Sea Brach, Qingdao 266003, Peoples R China; 3.Univ Hamburg, D-20146 Hamburg, Germany
推荐引用方式 GB/T 7714	Zhao Jian,Chen Xueen,Xu Jiangling,et al. Assimilation of surface currents into a regional model over Qingdao coastal waters of China[J]. ACTA OCEANOLOGICA SINICA,2013,32(7):21-28.
APA	Zhao Jian,Chen Xueen,Xu Jiangling,Hu Wei,Chen Jinrui,&Thomas, Pohlmann.(2013).Assimilation of surface currents into a regional model over Qingdao coastal waters of China.ACTA OCEANOLOGICA SINICA,32(7),21-28.
MLA	Zhao Jian,et al."Assimilation of surface currents into a regional model over Qingdao coastal waters of China".ACTA OCEANOLOGICA SINICA 32.7(2013):21-28.