Extraction of 10–30-Day Stable Components from a Boreal Atmosphere during ENSO Phases

Figure 2

Monthly change in the average explained variance of the three typical years’ pentad averages for the 10–30-day STs of the Northern Hemisphere 500 hPa height field. The gray line denotes the linear trend.

(a) Jan.-Feb.

(b) Feb.-Mar.

(c) Mar.-Apr.

(d) Apr.-May

(e) May-Jun.

(f) Jun.-Jul.

(g) Jul.-Aug.

(h) Aug.-Sep.

(i) Sep.-Oct.

(j) Oct.-Nov.

(k) Nov.-Dec.

(l) Dec.-Jan.