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

Table 3

Planetary-, synoptic-, and alternating-scale dominance results for the three-year period (2002–2004) analysis and for each season performed in this study, over the entire NH. The number and percentage for each year or season and the total is displayed.

(a)

Year	Planetary	Synoptic	Alternating
2002	15/37%	17/41%	9/22%
2003	22/46%	11/23%	15/31%
2004	18/49%	16/43%	3/8%
Total	55/44%	44/35%	27/21%

(b)

Season	Planetary	Synoptic	Alternating
Winter	12/33%	17/48%	7/19%
Spring	12/39%	14/45%	5/16%
Summer	16/55%	6/21%	7/24%
Fall	15/50%	7/23%	8/27%