Fig. 11: The interdecadal variations in SST and circulation.
From: The interdecadal variations of cross-month correlation feature of the NWPSH

a Differences in summer meridionally averaged (5°S−10°N) vertical pressure velocity (W, shading, unit: \({10}^{-2}{\cdot} {\rm{Pa}}{\cdot {\rm{s}}}^{-1}\)) and zonal-vertical circulation (UW, vectors, zonal wind unit: \({{\rm{m}}{\cdot} {\rm{s}}}^{-1}\), vertical pressure velocity unit: \({10}^{-2}{\cdot} {\rm{Pa}}{\cdot {\rm{s}}}^{-1}\)) between 2006−2021 and 1979−2005 (2006−2021 minus 1979−2005). b is similar to (a), but for zonally averaged (100°E − 160°E) meridional-vertical circulation (VW). c is similar to (a), but for OLR spatial differences (unit: \({{\rm{W}}{\cdot} {\rm{m}}}^{-2}\)). d is similar to (a), but for SST spatial differences (unit: \({\rm{K}}\)). Dots indicate that the shading reaches the 95% confidence level, and only vectors reaching the 95% confidence level are displayed. The purple and black boxes in (d) denote the key SST regions for defining the Ind_Pac index.