The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation

<div>(a) The optimal length for temperature and <i>U</i>-wind by the vertical model level. (b) The relative error of <i>U</i>-wind raw estimates and optimal filtering results.</div>

Advances in Meteorology

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Figure 10

Figure 10: The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation 

Figure 10 | The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation 