Optimization of the Spatiotemporal Parameters in a Dynamical Marine Ecosystem Model Based on the Adjoint Assimilation
Joint Authors
Wang, Chunhui
Li, Xiaoyan
Fan, Wei
Lv, Xianqing
Source
Mathematical Problems in Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-05-27
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
By utilizing spatiotemporal biological parameterizations, the adjoint variational method was applied to a 3D marine ecosystem dynamical model.
The results of twin experiments demonstrated that the mean absolute error (MAE) of phytoplankton in the surface layer and the reduced cost function (RCF) could be used to evaluate both the simulation results and parameter estimation.
Spatiotemporal variation of key parameters (KPs) was optimized in real experiments.
The RCF and MAE in each assimilation period (72 periods per year) decreased obviously.
The spatially varying KP (KPS), temporally varying KP (KPT), and constant KP (KPC) were obtained by averaging KPs of spatiotemporal variation.
Another type of spatiotemporal KP (KPST) was represented by KPS, KPT, and KPC.
The correlation analysis of KPs, either KPS or KPT, accorded with the real ecological mechanism.
Running the model with KPS, KPT, KPC, and KPST, respectively, we found that MAE was the minimum when KPs were spatiotemporal variation (KPST), while MAE reached its maximum when KPs were constant (KPC).
Using spatiotemporal KPs could improve simulation precision compared with only using spatially varying KPs, temporally varying KPs, or constant KPs (these forms are the results in a previous study).
KPST, a representation of spatiotemporal variation, reduces the variable number in calculation.
American Psychological Association (APA)
Li, Xiaoyan& Wang, Chunhui& Fan, Wei& Lv, Xianqing. 2013. Optimization of the Spatiotemporal Parameters in a Dynamical Marine Ecosystem Model Based on the Adjoint Assimilation. Mathematical Problems in Engineering،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-1031832
Modern Language Association (MLA)
Li, Xiaoyan…[et al.]. Optimization of the Spatiotemporal Parameters in a Dynamical Marine Ecosystem Model Based on the Adjoint Assimilation. Mathematical Problems in Engineering No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-1031832
American Medical Association (AMA)
Li, Xiaoyan& Wang, Chunhui& Fan, Wei& Lv, Xianqing. Optimization of the Spatiotemporal Parameters in a Dynamical Marine Ecosystem Model Based on the Adjoint Assimilation. Mathematical Problems in Engineering. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-1031832
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1031832