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

<div>Energy spectra of the temperature standard deviation at (a) 500 hPa and (b) 1000 hPa.</div>

Advances in Meteorology

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Figure 5

Figure 5: The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation 

Figure 5 | The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation 