A Study of Coupling Parameter Estimation Implemented by 4D-Var and EnKF with a Simple Coupled System
Joint Authors
Han, Guijun
Wu, Xinrong
Zhang, Shaoqing
Liu, Zhengyu
Navon, Ionel Michael
Li, Wei
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-06
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Coupling parameter estimation (CPE) that uses observations to estimate the parameters in a coupled model through error covariance between variables residing in different media may increase the consistency of estimated parameters in an air-sea coupled system.
However, it is very challenging to accurately evaluate the error covariance between such variables due to the different characteristic time scales at which flows vary in different media.
With a simple Lorenz-atmosphere and slab ocean coupled system that characterizes the interaction of two-timescale media in a coupled “climate” system, this study explores feasibility of the CPE with four-dimensional variational analysis and ensemble Kalman filter within a perfect observing system simulation experiment framework.
It is found that both algorithms can improve the representation of air-sea coupling processes through CPE compared to state estimation only.
These simple model studies provide some insights when parameter estimation is implemented with a coupled general circulation model for improving climate estimation and prediction initialization.
American Psychological Association (APA)
Han, Guijun& Wu, Xinrong& Zhang, Shaoqing& Liu, Zhengyu& Navon, Ionel Michael& Li, Wei. 2015. A Study of Coupling Parameter Estimation Implemented by 4D-Var and EnKF with a Simple Coupled System. Advances in Meteorology،Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052764
Modern Language Association (MLA)
Han, Guijun…[et al.]. A Study of Coupling Parameter Estimation Implemented by 4D-Var and EnKF with a Simple Coupled System. Advances in Meteorology No. 2015 (2015), pp.1-16.
https://search.emarefa.net/detail/BIM-1052764
American Medical Association (AMA)
Han, Guijun& Wu, Xinrong& Zhang, Shaoqing& Liu, Zhengyu& Navon, Ionel Michael& Li, Wei. A Study of Coupling Parameter Estimation Implemented by 4D-Var and EnKF with a Simple Coupled System. Advances in Meteorology. 2015. Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052764
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1052764