Temperature Variability over the Po Valley, Italy, according to Radiosounding Data

Figure 2

Illustration of the preliminary data processing as applied to the data at 10 km altitude. Panel (a) presents the 10-day averaged temperature data (red curve) and the corresponding long-period march (blue curve), while the difference between two curves that is considered to represent the intra-annual variations is given in panel (b). Panel (c) shows detrended long-period variations presented by the azure curve and the oscillations, composed of lower than 1-year cycles (brown curve). The difference between them, given in panel (d), can be associated with the interannual variations.

(a)

(b)

(c)

(d)