Fig. 4From: Evaluating precipitation prediction skill for the pre- and postrainy seasons in South China in ECMWF subseasonal forecastsThe mean circulation a–c and synoptic model d large-scale circulations during the prerainy season in South China. a The 500 hPa geopotential height field (contours, unit: dagpm) and wind field (vector, unit: m/s); b the 850 hPa wind field (wind bar, 4 m/s) and pseudo-equivalent potential temperature (contours unit: K); c Sea-level pressure field (contours, unit: hPa). The shading indicates the terrain height (unit: m)Back to article page