Harmonic Analysis of the Spatiotemporal Pattern of Thunderstorms in Iran (1961–2010)

Figure 4

Spatial distribution of variance (contour) and cycles (shaded) of Iran’s thunderstorms during various periods. (a) 1961–1970, (b) 1971–1980, (c) 1981–1990, (d) 1991–2000, (e) 2001–2010, and (f) 1960–2010.

(a)

(b)

(c)

(d)

(e)

(f)