anomaly correlation of the geopotential height at 500 hPa for the experiment where the form drag scheme was switched off, as a function of leadtime
(corresponding to red curve in fig 2)
 
12h     0.9992098
24h     0.9972923
48h     0.9886886
72h     0.9698858
96h     0.9357883
120h    0.8805465
144h    0.8020396
168h    0.7064111
192h    0.6016797
216h    0.4922275
240h    0.4025265


anomaly correlation of the geopotential height at 500 hPa for the control experiment , as a function of leadtime (corresponding to black curve in fig 2)

12h     0.9995969
24h     0.9988837
48h     0.9950384
72h     0.9851309
96h     0.9639639
120h     0.9249998
144h     0.8651755
168h     0.7873809
192h     0.6940223
216h     0.5994729
240h    0.5136705

