搜索结果: 1-15 共查到“ensemble Kalman Filter”相关记录15条 . 查询时间(0.09 秒)
CROP MODEL DATA ASSIMILATION WITH THE ENSEMBLE KALMAN FILTER FOR IMPROVING REGIONAL CROP YIELD FORECASTS
Crop model data assimilation Ensemble Kalman filter
2015/9/8
Uncertainty in spatial and temporal distribution of rainfall in regional crop yield
simulations comprises a major fraction of the error on crop model simulation results. In
this paper we used an Ens...
Comparison of the ensemble Kalman filter and 4D-Var assimilation methods using a stratospheric tracer transport model
the ensemble Kalman filter 4D-Var assimilation methods stratospheric tracer transport model
2014/12/19
An ensemble Kalman filter (EnKF) assimilation method is applied to the tracer transport using the same stratospheric transport model as in the four-dimensional variational (4D-Var) assimilation system...
Covariance inflation in the ensemble Kalman filter: a residual nudging perspective and some implications
Covariance inflation ensemble Kalman filter residual nudging perspective some implications
2013/6/17
This note examines the influence of covariance inflation on the distance between the measured observation and the simulated (or predicted) observation with respect to the state estimate. In order for ...
Sensitivity tests for an ensemble Kalman filter for aerosol assimilation
an ensemble Kalman filter aerosol assimilation
2010/8/16
We present sensitivity tests for a global aerosol assimilation system utilizing AERONET observations of AOT (aerosol optical thickness) and AAE (aerosol Ångström exponent). The assimilation...
Applying an ensemble Kalman filter to the assimilation of AERONET observations in a global aerosol transport model
Kalman filter assimilation AERONET observations global aerosol transport model
2010/3/16
We present a global aerosol assimilation system based on an Ensemble Kalman filter, which we believe leads to a significant improvement in aerosol fields. The ensemble allows realistic, spatially and ...
Data Driven Computing by the Morphing Fast Fourier Transform Ensemble Kalman Filter in Epidemic Spread Simulations
Data Driven Computing Morphing Fast Fourier Transform Ensemble Kalman Filter Epidemic Spread Simulations
2010/3/11
The FFT EnKF data assimilation method is proposed and applied to a stochastic
cell simulation of an epidemic, based on the S-I-R spread model. The FFT EnKF
combines spatial statistics and ensemble f...
A comparison of assimilation results from the ensemble Kalman Filter and a reduced-rank extended Kalman Filter
assimilation results ensemble Kalman Filter reduced-rank extended Kalman Filter
2009/11/12
The goal of this study is to compare the performances of the ensemble Kalman filter and a reduced-rank extended Kalman filter when applied to different dynamic regimes. Data assimilation experiments a...
Ensemble Kalman filter assimilation of temperature and altimeter data with bias correction and application to seasonal prediction
Kalman filter assimilation temperature and altimeter data bias correction and application seasonal prediction
2009/11/9
To compensate for a poorly known geoid, satellite altimeter data is usually analyzed in terms of anomalies from the time mean record. When such anomalies are assimilated into an ocean model, the bias ...
Parameter estimation in an atmospheric GCM using the Ensemble Kalman Filter
Parameter estimation atmospheric GCM Ensemble Kalman Filter
2009/11/9
We demonstrate the application of an efficient multivariate probabilistic parameter estimation method to a spectral primitive equation atmospheric GCM. The method, which is based on the Ensemble Kalma...
An implementation of the Local Ensemble Kalman Filter in a quasi geostrophic model and comparison with 3D-Var
Local Ensemble Kalman Filter quasi geostrophic model 3D-Var
2009/11/2
We perform data assimilation experiments with a widely used quasi-geostrophic channel model and compare the Local Ensemble Kalman Filter (LEKF) with a 3D-Var developed for this model. The LEKF shows a...
Sequential Assimilation of Tracer Test Data by Ensemble Kalman Filter for Fracture Identification
Ensemble Kalman filter Sequential data assimilation Tracer test Fracture CVBEM
2010/9/8
Application of the ensemble Kalman filter (EnKF) to reservoir characterization has the limitation that the observed watercut data cannot be reflected for tuning model variables in some time intervals....
Relative Permeability Estimation by Ensemble Kalman Filter Using Function Transformation
Ensemble Kalman filter Function transformation Relative permeability Automatic history matching Sequential data assimilation
2010/9/8
The application of the ensemble Kalman filter (EnKF) using function transformation to the estimation of relative permeability is presented. Inconsistent values may be calculated in the filtering proce...
Estimating surface CO2 fluxes from space-borne CO2 dry air mole fraction observations using an ensemble Kalman Filter
surface CO2 fluxes space-borne CO2 ensemble Kalman Filter
2009/5/6
We have developed an ensemble Kalman Filter (EnKF) to estimate 8-day regional surface fluxes of CO2 from space-borne CO2 dry-air mole fraction observations (XCO2) and evaluate the approach using a ser...
On the Convergence of the Ensemble Kalman Filter
Exchangeable random variables Monte-Carlo methods dataassimilation theoretical analysis asymptotics EnKF filtering
2010/3/17
Convergence of the ensemble Kalman filter in the limit for large ensembles
to the Kalman filter is proved. In each step of the filter, convergence of
the ensemble sample covariance follows from a we...
An Ensemble Kalman Filter for severe dust storm data assimilation over China
Ensemble Kalman Filter dust storm China
2008/11/10
An Ensemble Kalman Filter (EnKF) data assimilation system was developed for a regional dust transport model. This paper applied the EnKF method to investigate modeling of severe dust storm episodes oc...