A two-time-level split-explicit ocean circulation model (MASNUM) and its validation

doi:10.1007/s13131-014-0553-z

	A two-time-level split-explicit ocean circulation model (MASNUM) and its validation
	Han Lei 1,2
刊名	ACTA OCEANOLOGICA SINICA
	2014-11
卷号	33 期号:11 页码:11-35
关键词	ocean circulation model forward-backward method equatorial Rossby soliton Yellow Sea Cold Water Mass
ISSN号	0253-505X
DOI	10.1007/s13131-014-0553-z
英文摘要	A two-time-level, three-dimensional numerical ocean circulation model (named MASNUM) was established with a two-level, single-step Eulerian forward-backward time-differencing scheme. A mathematical model of large-scale oceanic motions was based on the terrain-following coordinated, Boussinesq, Reynolds-averaged primitive equations of ocean dynamics. A simple but very practical Eulerian forward-backward method was adopted to replace the most preferred leapfrog scheme as the time-differencing method for both barotropic and baroclinic modes. The forward-backward method is of second-order of accuracy, computationally efficient by requiring only one function evaluation per time step, and free of the computational mode inherent in the three-level schemes. This method is superior to the leapfrog scheme in that the maximum time step of stability is twice as large as that of the leapfrog scheme in staggered meshes thus the computational efficiency could be doubled. A spatial smoothing method was introduced to control the nonlinear instability in the numerical integration. An ideal numerical experiment simulating the propagation of the equatorial Rossby soliton was performed to test the amplitude and phase error of this new model. The performance of this circulation model was further verified with a regional (northwest Pacific) and a quasi-global (global ocean simulation with the Arctic Ocean excluded) simulation experiments. These two numerical experiments show fairly good agreement with the observations. The maximum time step of stability in these two experiments were also investigated and compared between this model and that model which adopts the leapfrog scheme.
资助项目	Special Projects on Public Sector[200905024] ; Special Projects on Public Sector[201409089]
WOS关键词	COLD-WATER MASS ; FREE-SURFACE ; POTENTIAL TEMPERATURE ; NUMERICAL-MODELS ; COASTAL OCEAN ; ALGORITHMS ; FILTER ; WIND ; SEA ; ESTUARIES
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000344583400002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/27221]
专题	自然资源部第一海洋研究所
通讯作者	Han Lei
作者单位	1.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Han Lei. A two-time-level split-explicit ocean circulation model (MASNUM) and its validation[J]. ACTA OCEANOLOGICA SINICA,2014,33(11):11-35.
APA	Han Lei.(2014).A two-time-level split-explicit ocean circulation model (MASNUM) and its validation.ACTA OCEANOLOGICA SINICA,33(11),11-35.
MLA	Han Lei."A two-time-level split-explicit ocean circulation model (MASNUM) and its validation".ACTA OCEANOLOGICA SINICA 33.11(2014):11-35.