Fig. 2

850 hPa geopotential height (m), with a 1540 m geopotential height contour overlaid with 850 hPa winds (m/s), for a the wet composite JAS GHA masked rainfall, and c dry composite JAS GHA masked rainfall. Wet (b) and dry (d) composite differences (composite-full baseline) are in the second column. Composite difference wind vectors are shown where either meridional or zonal wind differences are significant at a 0.1 threshold, and grey stippling indicates a geopotential height difference significant at a 0.1 critical threshold