Research Article

Analysis of the Anomalous Signals near the Tropopause before the Overshooting Convective System Onset over the Tibetan Plateau

Figure 5

The composites of (a–h) longitude-pressure cross section at 34°N and (a1–h1) latitude-pressure cross section at 98°E of PV (units: PVU, color contours) and potential temperature (units: K, black lines, contour interval: 5 K) fields for the (a, a1) 7th day, (b, b1) 6th day, (c, c1) 5th day, (d, d1) 4th day, (e, e1) 3rd day, (f, f1) 2nd day, (g, g1) 1st day, and (h, h1) 0 day before the OCS onset for 41 OCS events. The red lines show the contours of 1, 2, and 3.5 PV units.