Formulations for Estimating Spatial Variations of Analysis Error Variance to Improve Multiscale and Multistep Variational Data Assimilation

When the coarse-resolution observations used in the first step of multiscale and multistep variational data assimilation become increasingly nonuniform and/or sparse, the error variance of the first-step analysis tends to have increasingly large spatial variations. However, the analysis error varian...

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Bibliographic Details
Main Authors: Qin Xu, Li Wei
Format: Article
Language:English
Published: Hindawi Limited 2018-01-01
Series:Advances in Meteorology
Online Access:http://dx.doi.org/10.1155/2018/7931964