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Transient Suppression in Optimal Sequential Analysis
Publisher: American Meteorological Society
Abstract: A problem associated with four-dimensional data assimilation in numerical models of the atmosphere is the excitation of spurious dynamical modes such as gravity-inertial waves. If the desired diagnostic restrictions on the ...
A Comparison of the Performance of Quasi-Optimal and Conventional Objective Analysis Schemes
Publisher: American Meteorological Society
Abstract: Verification error covariance statistics for operational 12-hr prognoses of 300-mb heights and winds have been obtained. Based on these statistical data, optimal weightings on height and wind observations at a typical ...
Static and Dynamic Constraints on the Estimation of Space-Time Covariance and Wavenumber-Frequency Spectral Fields
Publisher: American Meteorological Society
Abstract: A straightforward method for estimating the spectral characteristics of spatially distributed fields is to collect a suitable quantity of station-to-station auto- and cross-covariance data, interpolate these onto a regular ...