Fig. 3
From: Ensemble size versus bias correction effects in subseasonal-to-seasonal (S2S) forecasts
Temporal evolution of the four terms (from top to bottom: AC2, CB2, UB2, and CV2) of MSSS decomposition for (left) 50- and (right) 500-hPa geopotential height forecasts initialized during the DJF 2015–2018 period in the Northern Hemisphere extratropics of individual ensemble members (gray lines) and their mean (black line) as well as those of the ensemble mean with varying ensemble sizes (Ne = 2, 10, and 51; colored lines). Note that CV2, which is independent of the forecasts, is indicated with a green line