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Online bias estimation in SSH assimilation - NASA Global Modeling ...

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observable<br />

observable<br />

est. <strong>bias</strong><br />

a) Standard <strong>assimilation</strong><br />

true climate<br />

Assimilation alters the<br />

model climatology<br />

model climate<br />

b) Assimilation with <strong>Onl<strong>in</strong>e</strong> <strong>bias</strong> <strong>estimation</strong> (OBE)<br />

true climate<br />

Estimates of variability (<strong>bias</strong>ed model<br />

state) and climatological error (<strong>bias</strong>)<br />

are evolved side by side<br />

model climate<br />

<strong>Onl<strong>in</strong>e</strong> <strong>bias</strong> <strong>estimation</strong>

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