Diurnal Variations in Summer Precipitation over the Yellow River Basin

Figure 8

Daily mean zonal wind u (units: m·s⁻¹) and vertical velocity omega (unit: hPa·s⁻¹) in the summer months from 2000 to 2014. The vertical section is in an east–west direction along the zonal average 33.5–42.5°N. The red circle denotes the transition region between the first and second stair steps of the YRB, and the blue circle denotes the transition region between the second and third stair steps of the YRB. The gray shaded areas indicate the elevation of the terrain.