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RISEvaluation of a Spatial/Spectral Covariance Localization Approach for Atmospheric Data Assimilation
Publisher: American Meteorological Society
Abstract: n this study, several approaches for estimating background-error covariances from an ensemble of error realizations are examined, including a new spatial/spectral localization approach. The new approach shares aspects of ...
Implementation of All-Sky Assimilation of Microwave Humidity Sounding Channels in Environment Canada’s Global Deterministic Weather Prediction System
Publisher: American Meteorological Society
Sensitivity of Global Ensemble Forecasts to the Initial Ensemble Mean and Perturbations: Comparison of EnKF, Singular Vector, and 4D-Var Approaches
Publisher: American Meteorological Society
Abstract: This study examines the sensitivity of global ensemble forecasts to the use of different approaches for specifying both the initial ensemble mean and perturbations. The current operational ensemble prediction system of the ...
Toward All-Sky Assimilation of Microwave Temperature Sounding Channels in Environment Canada’s Global Deterministic Weather Prediction System
Publisher: American Meteorological Society
Scale-Dependent Background Error Covariance Localization: Evaluation in a Global Deterministic Weather Forecasting System
Publisher: American Meteorological Society
Abstract: AbstractScale-dependent localization (SDL) consists of applying the appropriate (i.e., different) amount of localization to different ranges of background error covariance spatial scales while simultaneously assimilating ...
Interchannel Error Correlation Associated with AIRS Radiance Observations: Inference and Impact in Data Assimilation
Publisher: American Meteorological Society
Abstract: The interchannel observation error correlation (IOEC) associated with radiance observations is currently assumed to be zero in meteorological data assimilation systems. This assumption may lead to suboptimal analyses. Here, ...
Analysis and Forecasting of Sea Ice Conditions with Three-Dimensional Variational Data Assimilation and a Coupled Ice–Ocean Model
Publisher: American Meteorological Society
Abstract: A three-dimensional variational data assimilation (3DVAR) system has been developed to provide analyses of the ice?ocean state and to initialize a coupled ice?ocean numerical model for forecasting sea ice conditions. This ...
Progress toward the Application of a Localized Particle Filter for Numerical Weather Prediction
Publisher: American Meteorological Society
Abstract: AbstractA series of papers published recently by the first author introduce a nonlinear filter that operates effectively as a data assimilation method for large-scale geophysical applications. The method uses sequential ...
Background Error Correlation between Surface Skin and Air Temperatures: Estimation and Impact on the Assimilation of Infrared Window Radiances
Publisher: American Meteorological Society
Abstract: This paper makes use of ensemble forecasts to infer the correlation between surface skin temperature Ts and air temperature Ta model errors. The impact of this correlation in data assimilation is then investigated. In the ...
An Inverse Method for Tracking Ice Motion in the Marginal Ice Zone Using Sequential Satellite Images
Publisher: American Meteorological Society
Abstract: A new method for tracking ice motion and estimating ocean surface currents from sequential satellite images is presented. It is particularly suited for the marginal ice zone. A simple ice advection model, driven by wind ...