Research Article

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 5

(a) The blocking area averaged enstrophy using (2) for the blocking event displayed in Figure 3 which occurred during 05–28 August 2004. The relative stability level changes at onset (02–05 August) and at decay (20–28 August) stages. The dash dotted horizontal line defines the monthly mean value. The left vertical line marks the beginning, whereas the right vertical line marks the end of the selected blocking event; (b) same as Figure 5(a) except for the synoptic-scale height.
610263.fig.005a
(a)
610263.fig.005b
(b)