scholarly journals Comparison of the Extended Kalman Filter and the Ensemble Kalman Filter Using the Barotropic General Circulation Model

2009 ◽  
Vol 87 (2) ◽  
pp. 347-359
Author(s):  
Keiichi KONDO ◽  
H. L. TANAKA
Keyword(s):  
Kalman Filter ◽  
General Circulation Model ◽  
Extended Kalman Filter ◽  
Ensemble Kalman Filter ◽  
General Circulation ◽  
Circulation Model

scholarly journals An efficient ensemble Kalman Filter implementation via shrinkage covariance matrix estimation: exploiting prior knowledge

2021 ◽  
Vol 25 (3) ◽  
pp. 985-1003
Author(s):  
Santiago Lopez-Restrepo ◽  
Elias D. Nino-Ruiz ◽  
Luis G. Guzman-Reyes ◽  
Andres Yarce ◽  
O. L. Quintero ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Prior Knowledge ◽  
Covariance Matrix ◽  
Ensemble Kalman Filter ◽  
General Circulation ◽  
Circulation Model ◽  
Covariance Matrix Estimation ◽  
Practical Implementation ◽  
Matrix Estimation ◽  
The Impact

AbstractIn this paper, we propose an efficient and practical implementation of the ensemble Kalman filter via shrinkage covariance matrix estimation. Our filter implementation combines information brought by an ensemble of model realizations, and that based on our prior knowledge about the dynamical system of interest. We perform the combination of both sources of information via optimal shrinkage factors. The method exploits the rank-deficiency of ensemble covariance matrices to provide an efficient and practical implementation of the analysis step in EnKF based formulations. Localization and inflation aspects are discussed, as well. Experimental tests are performed to assess the accuracy of our proposed filter implementation by employing an Advection Diffusion Model and an Atmospheric General Circulation Model. The experimental results reveal that the use of our proposed filter implementation can mitigate the impact of sampling noise, and even more, it can avoid the impact of spurious correlations during assimilation steps.

An eddy-permitting ocean-sea ice general circulation model (E3SMv0-HiLAT03): Description and evaluation

2019 ◽  
Author(s):  
Jiaxu Zhang ◽  
Wilbert Weijer ◽  
Mathew Einar Maltrud ◽  
Carmela Veneziani ◽  
Nicole Jeffery ◽  
...  
Keyword(s):  
Sea Ice ◽  
General Circulation Model ◽  
General Circulation ◽  
Circulation Model

Calculating the Natural Atmospheric Radiation Using the General Circulation Model of the Earth’s Lower and Middle Atmosphere

2020 ◽  
Vol 12 (5) ◽  
pp. 803-815
Author(s):  
B. N. Chetverushkin ◽  
I. V. Mingalev ◽  
E. A. Fedotova ◽  
K. G. Orlov ◽  
V. M. Chechetkin ◽  
...  
Keyword(s):  
General Circulation Model ◽  
General Circulation ◽  
Middle Atmosphere ◽  
Circulation Model ◽  
Atmospheric Radiation
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