Fig. 7: Different sources used to identify clusters of ETCs and ARs.
From: A kinematic analysis of extratropical cyclones, warm conveyor belts and atmospheric rivers
a Infrared satellite image, b NCEP surface analysis chart showing mslp (contours), surface fronts and position of surface high (H) and low (L) pressure centres, c Centre for Western Weather and Water Extremes showing the magnitude of IVT (coloured shading), the direction of IVT (arrows) and mslp (black contours). d Microwave satellite total column water vapour (TCWV). Figures overlaid with the position of the family of ETCs (circles). Colourbars have been deliberately removed to focus on position of ETC family and frontal features with respect to AR family without dependence on criteria for identifying them.
