Fig. 4: RMSE, ACC, and IIEE for September SIC forecast (2001–2020).
From: Seasonal forecasting of Pan-Arctic sea ice with state space model
(a), (c), (e) show results for dynamical models, and (b), (d), (f) for statistical models. RMSE and ACC are averaged over regions where SIC standard deviation >10%. Models are color-coded, with reference forecasts in grey. Skill metrics are shown for each initialization from June 1 to September 1. Bracketed numbers in the legend indicate the years of data each model contributed over 20 years.
