Figure 3
Composites of (A) 700 hPa geopotential height (700 mb height) and (B) daily maximum temperature for a sequence of days before and after each KD case within a given group of cases, from 4 and 5 days before (DOO - 5) to 4 and 5 days after (DOO + 5) date of onset (DOO). The groups of cases shown are: (2nd row from top of each panel) all KD cases; KD cases not falling into a temporal cluster (3rd row from top); and KD cases falling into a temporal cluster (bottom row). For comparison, composites associated with a random sampling of days having no KD cases is shown in the upper row in each panel. In both sets of figures, stippling indicates statistical significance of an anomaly composite in a given location. On the bottom (local) panel, the blue dots in the date of onset figure (center column) show where the KD cases occurred. Here we show only cases (and random, non-KD DOO equivalent days) from the main KD season, between December and April (DJFMA). Equivalent plots for other seasons and other variables (U-wind, V-wind, Minimum Daily Temperature, and Precipitation) are shown in the SI. The high pressure anomalies in the global figures for Cluster KD Case Days are consistent with reduced wind speeds across the Pacific and the high temperatures in the San Diego region.
