Research Article

A Study of Coupling Parameter Estimation Implemented by 4D-Var and EnKF with a Simple Coupled System

Figure 11

Time series of (panel (a)) and (panel (b)) for 4D-Var CPE (black) with MTW being 500 time steps, truth (red), and EnKF CPE (blue) with ensemble size being 50 in EXP-4. Here, the observational interval is set to 5 time steps.
(a)
(b)