Estimation of Open Boundary Conditions Based on an Isopycnic-Coordinate Internal Tidal Model with Adjoint Assimilation Method
Joint Authors
Gao, Yanqiu
Jin, Guangzhen
Lv, Xianqing
Chen, Haibo
Source
Mathematical Problems in Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-12
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The isopycnic-coordinate internal tidal model with adjoint assimilation method is developed into a three-layer version.
Two groups of ideal experiments are carried out in order to investigate the estimation of spatially varying open boundary conditions (OBCs).
In group 1, different independent point schemes (IPSs) are used to invert 6 kinds of prescribed distributions of OBCs.
Results show that, after assimilation, the cost functions and their gradient norms are reduced by about 2 orders of magnitude and by about 1 order of magnitude, respectively; the mean absolute errors (MAEs) in OBCs and the vector differences of horizontal current are reduced by 1 order of magnitude and by more than 23.53% compared with the values before assimilation, respectively.
The results demonstrate that the three-layered model has a good ability in estimating the spatially varying OBCs; the use of IPSs can effectively improve the estimation precision; fewer independent points are feasible when the distribution is simpler, and appropriately more independent points are required when the distribution is more complex.
In group 2, by using the optimal IPSs in group 1, the model is also able to successfully invert the OBCs on a real topography in the Luzon Strait area.
The results are important to the study of the internal tide in the South China Sea.
American Psychological Association (APA)
Gao, Yanqiu& Jin, Guangzhen& Chen, Haibo& Lv, Xianqing. 2013. Estimation of Open Boundary Conditions Based on an Isopycnic-Coordinate Internal Tidal Model with Adjoint Assimilation Method. Mathematical Problems in Engineering،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1009036
Modern Language Association (MLA)
Gao, Yanqiu…[et al.]. Estimation of Open Boundary Conditions Based on an Isopycnic-Coordinate Internal Tidal Model with Adjoint Assimilation Method. Mathematical Problems in Engineering No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-1009036
American Medical Association (AMA)
Gao, Yanqiu& Jin, Guangzhen& Chen, Haibo& Lv, Xianqing. Estimation of Open Boundary Conditions Based on an Isopycnic-Coordinate Internal Tidal Model with Adjoint Assimilation Method. Mathematical Problems in Engineering. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1009036
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1009036