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Bred vectors and forecast errors in the NASA coupled general ...

Bred vectors and forecast errors in the NASA coupled general ...

Figure 9 Forecasted

Figure 9 Forecasted zonal wind stress anomaly in the upper ocean from January 1997 to December 1997 from (a) the control forecast, (b) the perturbed forecast initialized with PBV, (c) the perturbed forecast initialized with the NBV, (d) the perturbed forecast initialized with PBVO (ocean only), (e) the perturbed forecast initialized with PBVA (atmosphere only) and (f) observations, obtained from SSM/I. All fields are daily data with 1 week running mean. 48

Figure 10 Monthly mean equatorial heat content anomaly in the upper ocean (defined as the depth of 300m) from January 1997 to December 1997 from (a) the control forecast, (b) the perturbed forecast initialized with PBV, (c) the perturbed forecast initialized with the NBV, (d) the perturbed forecast initialized with PBVO (ocean only) and (e) the perturbed forecast initialized with PBVA (atmosphere only) and (f) the analysis data. The analysis data used for validation is derived from the OI scheme implemented in the same ocean GCM to assimilate temperature and synthetic salinity. 49

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