Inversion study on pollutant discharges in the Bohai Sea with the adjoint method

doi:10.1007/s11802-015-2501-8

	Inversion study on pollutant discharges in the Bohai Sea with the adjoint method
	Shen Youli 1,2; Wang Chunhui 3; Wang Yonggang 4; Lv Xianqing 1
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2015-12
卷号	14 期号:6 页码:941-950
关键词	adjoint method time-varying variable contamination concentration pollutant flux independent point scheme
ISSN号	1672-5182
DOI	10.1007/s11802-015-2501-8
英文摘要	The adjoint method is presented which could be used to estimate the time-varying contamination concentration (CC) from pollution source (PS). Then the pollutant flux is calculated. In order to guarantee the continuity of pollutant distribution and make the calculated results more accurate, the independent point (IP) scheme is proposed. The contamination concentrations (CCs) at some time steps are selected as the independent points (IPs), and only CCs at these IPs are optimized while CCs at other points are calculated through linear interpolation of the independent CCs. In twin numerical experiments, all the given distributions are successfully inverted with the adjoint method. The cost functions and the mean absolute errors (MAEs) in concentrations and pollutant fluxes decrease greatly after assimilation, and the cost functions are reduced by about 5 orders of magnitude compared with their initial values. The results indicate that the adjoint method is computationally efficient to recover CCs from PS. It is easier to invert the given distribution which is less complex. The inversion efficiency with IP scheme is raised compared to that without this scheme. The IP scheme is significant for the inversion result, in which appropriate IP number could yield better inversion results. More work will be done to apply this method to real experiment.
资助项目	Fundamental Research Funds for the Central Universities[201262007]
WOS关键词	VARIATIONAL DATA ASSIMILATION ; CONVERGENCE CONDITIONS ; PARAMETER-ESTIMATION ; MODEL ; TIME
WOS研究方向	Oceanography
语种	英语
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000364572000002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25795]
专题	自然资源部第一海洋研究所
通讯作者	Lv Xianqing
作者单位	1.Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China 2.SOA, Beihai Marine Environm Monitoring Ctr Stn, Beihai 536000, Peoples R China 3.State Ocean Adm, Key Lab Marine Spill Oil Identificat & Damage Ass, North China Sea Branch, Qingdao 266033, Peoples R China 4.SOA, Inst Oceanog 1, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Shen Youli,Wang Chunhui,Wang Yonggang,et al. Inversion study on pollutant discharges in the Bohai Sea with the adjoint method[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2015,14(6):941-950.
APA	Shen Youli,Wang Chunhui,Wang Yonggang,&Lv Xianqing.(2015).Inversion study on pollutant discharges in the Bohai Sea with the adjoint method.JOURNAL OF OCEAN UNIVERSITY OF CHINA,14(6),941-950.
MLA	Shen Youli,et al."Inversion study on pollutant discharges in the Bohai Sea with the adjoint method".JOURNAL OF OCEAN UNIVERSITY OF CHINA 14.6(2015):941-950.