Connection between Two Leading Modes of Autumn Rainfall Interannual Variability in Southeast China and Two Types of ENSO-Like SSTA

Figure 6

(a) 850 hPa wind field (vector, m·s⁻¹), (b) column-integrated water vapor flux (unit: g·kg⁻¹·m·s⁻¹), (c) the regression of zonal wind and vertical velocity (omega multiplied by −100) cross section along 5°S–5°N on the Nino 3 index, and (d) the regression of meridional wind and vertical velocity (omega multiplied by −100) along 110°E–120°E on the Nino 3 index. Red vector in (a, b) and shadings in (c, d) through significant inspection at the 90% confidence level. (e) Schematic diagram showing anomalous Walker circulation associated with EP ENSO-like SSTA, the latitudinal circulation in tropical Pacific denotes the anomalous Walker circulation and to its northwest side is the anomalous meridional owning the joint descending branch in tropical Western Pacific. The shadings represent the SSTA during the positive phase years of EP ENSO (unit: °C), and dotted region is the significant area through the 90% significance t-test.

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