Influence of Asian-Pacific Oscillation on Precipitation in Central Eastern China during Autumn (1960–2016)

Figure 6

Composite maps of (a) total precipitation (unit: mm, shading), (b) vertically integrated water vapor flux (unit: kg∙m·s⁻¹; vectors), (c) pseudoequivalent potential temperature (θ_se; unit: K; contours) at 850 hPa, and (d) vertical wind (horizontal wind m·s⁻¹, vertical p-velocity: 0.01 Pa·s⁻¹; vectors) averaged along 30°–40°N between high and low APOI years. Shaded values are significant at the 90% (light) and 95% (dark) (stippled regions; 95%) confidence level from a two-tailed Student’s t-test.

(a)

(b)

(c)

(d)