Figure 1: Tide gauge sites and duration (a) Location of tide gauge sites around the UK, with site number; and (b) duration of the sea level records. Figure 2: Extreme sea level and skew surge events (a) Return period of the highest sea levels in each of the 96 sea level events, offset for mean sea level; (b) return period of the highest skew surges in each of the 111 skew surge events; (c) the number of sites per annum for which sea level data is available across the 40 sites; and (d) pie chart showing the number of skew surge events that led to sea level events (blue) and the number that did not (green). The grey shading in (a) and (b) indicates the number of sites for which data is available for each year the lighter the grey the more sites for which data is available. – Figure 3: Spatial footprints of extreme sea level events The spatial footprints of all the sea level events that impacted at least four tide gauge sites. The first number in the top left hand corner indicates the event ranking and the number in the bracket is the number of sites where the 1 in 5 year return level was reached or exceeded. The category one, two, three and four footprint events are shown in the first, second, third and fourth row of panels, respectively. Figure 4: Storm tracks of extreme sea level events for different spatial footprints The tracks of the storms that generated the sea level events shown in Fig. 3 that impacted at least four tide gauge sites, for the four categories identified. The dots indicate where the storms centres were at time of highest sea level return period. Figure 5: Seasonal distribution of extreme sea level and skew surge events Number of (a) sea level and (b) skew surge events per month for different return level thresholds. Figure 6: Temporal clustering of extreme sea level and skew surge events Number of days between successive (a) sea level and (b) skew surge events. The grey shading indicates the number of sites for which data is available for each year the lighter the grey the more sites for which data is available. –
Figure 1: Tide gauge sites and duration (a) Location of tide gauge sites around the UK, with site number; and (b) duration of the sea level records. Figure 2: Extreme sea level and skew surge events (a) Return period of the highest sea levels in each of the 96 sea level events, offset for mean sea level; (b) return period of the highest skew surges in each of the 111 skew surge events; (c) the number of sites per annum for which sea level data is available across the 40 sites; and (d) pie chart showing the number of skew surge events that led to sea level events (blue) and the number that did not (green). The grey shading in (a) and (b) indicates the number of sites for which data is available for each year – the lighter the grey the more sites for which data is available. Figure 3: Spatial footprints of extreme sea level events The spatial footprints of all the sea level events that impacted at least four tide gauge sites. The first number in the top left hand corner indicates the event ranking and the number in the bracket is the number of sites where the 1 in 5 year return level was reached or exceeded. The category one, two, three and four footprint events are shown in the first, second, third and fourth row of panels, respectively. Figure 4: Storm tracks of extreme sea level events for different spatial footprints The tracks of the storms that generated the sea level events shown in Fig. 3 that impacted at least four tide gauge sites, for the four categories identified. The dots indicate where the storms centres were at time of highest sea level return period. Figure 5: Seasonal distribution of extreme sea level and skew surge events Number of (a) sea level and (b) skew surge events per month for different return level thresholds. Figure 6: Temporal clustering of extreme sea level and skew surge events Number of days between successive (a) sea level and (b) skew surge events. The grey shading indicates the number of sites for which data is available for each year – the lighter the grey the more sites for which data is available.
SurgeWatch_Paper2_Manuscript_final.docx