Blocking Detection Based on Synoptic Filters

Figure 11

Southern Hemisphere blocking frequency: (a) for the reference setup (no filtering, solid, uppermost curve), NH settings (solid, lowermost curve), persistence filter disabled (dashed), extent filter reduced to 15.75^∘ (dash-dotted), persistence filter disabled and extent filter width 15.75^∘ (dotted) and (b) with quantile filters settings off (solid). 𝑄=0.5 (dashed), and 𝑄=0.7 (dotted).

(a)

(b)