Scale Analysis of Blocking Events from 2002 to 2004: A Case Study of an Unusually Persistent Blocking Event Leading to a Heat Wave in the Gulf of Alaska during August 2004
Figure 6
(a) The 500 hPa planetary-scale versus time (days) for a stationary box (40°N to 80°N and 160°E to 260°E) in the midlatitude northern hemispheric flow. The dash dotted line defines the mean monthly value for . The left vertical line marks the beginning, whereas the right vertical line marks the end of the selected blocking event; (b) same as Figure 6(a) except that now the synoptic-scale effect is taken into account.