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

Figure 7

The diagnosis of B2 (a), B4 (b), B5 (c), B7 (d), C2 (e), and C4 (f) related to the Nino 3 index: (a) anomalous relative vorticity advection transported by basic zonal wind (vector: basic zonal wind, unit: ms⁻¹; shading: , unit: 10⁻¹¹ m⁻¹·s⁻¹); (b) meridional relative vorticity advection carried by meridional wind anomaly (vector: meridional wind anomaly, unit: ms⁻¹; shading: , unit: 10⁻¹¹ m⁻¹·s⁻¹); (c) anomalous relative vorticity advection transported by basic meridional wind (vector: basic meridional wind, unit: ms⁻¹; shading: , unit: 10⁻¹¹ m⁻¹·s⁻¹); (d) planetary vorticity advection carried by meridional wind anomaly (vector: meridional wind anomaly, unit: ms⁻¹; shading: , unit: 10⁻¹¹ m⁻¹·s⁻¹); (e) anomalous temperature advection delivered by basic zonal wind (vector: basic zonal wind, unit: ms⁻¹; shading: , unit: 10⁻⁵ Km⁻¹); (f) temperature advection carried by meridional wind anomaly (vector: meridional wind anomaly, unit: ms⁻¹; shading: , unit: 10⁻⁵ km⁻¹). The perturbation of a physical quantity (such as vorticity) is the regression coefficient, obtained by this physical quantity regression on the standardized Nino 3 index. The red vector and the dotted area are through the 90% confidence t-test.

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