Fig. 4: Evolution of composite atmospheric circulation anomalies before and after the occurrence of REPE1 and REPE2 during 1979–2020. | npj Climate and Atmospheric Science

Fig. 4: Evolution of composite atmospheric circulation anomalies before and after the occurrence of REPE1 and REPE2 during 1979–2020.

From: Spatiotemporal characteristics of summer extreme precipitation over the Inner Tibetan Plateau in recent decades

Fig. 4

Evolution of the composite anomalies in geopotential height at 200 hPa (shading, bottom color bar; unit: gpm) and 500 hPa (contours, right color bar; unit: gpm) and horizontal wave activity fluxes at 200 hPa (vectors; unit: m2 s−2) from D-8 to D2 with an interval of 2 days for REPE1 (a, c, e, g, i, k) and REPE2 (b, d, f, h, j, l) over the ITP. Regions marked by black dots and solid contours indicate statistically significant geopotential height anomalies at the 95% confidence level at 200 and 500 hPa, respectively. The horizontal wave activity flux values less than 0.5 m2 s−2 are omitted. The region enclosed by gray and black polygons represents the TP and ITP, respectively.

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