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Wave and Tide Reports.

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Presentation on theme: "Wave and Tide Reports."— Presentation transcript:

1 Wave and Tide Reports

2 Photos courtesy of EMU Ltd
10 – 12m CD

3 Annual Report (all sites)

4 Annual Wave Reports Recovery rate Monthly means Highest storms

5 Time series for whole year
Annual Wave Reports Time series for whole year (including storm threshold)

6 Annual Wave Reports

7 Annual Wave Reports Milford-on-Sea

8 Annual Wave Reports – joint distribution

9 Annual Wave Reports – the “Storm Calendar”

10 2. Interim Wave Reports July to June Wave Rose Start Bay

11 3. Storm Reports Peaks over Threshold

12 Chesil – 10 March 2008 Tidal elevations from Weymouth (NSLTF (POL))
This intensive storm resulted from the development of an extensive, complex, deep low pressure system (central pressure 946 hPa), which transited rapidly across the southern half of the UK, filling slightly to 966hPa (Figures 5 to 6). The storm generated a long-lasting storm surge of nearly 0.8m at Weymouth. Although the peak of the storm occurred 4 hours after HW, the conditions at High Water (about 09:00), saw waves in excess of 4m, a near-equinoctial spring tide, and a storm surge of 0.63m to give a combined SWL elevation (at Weymouth) of 2.11m OD. Waves were from the SW, which is the direction of highest exposure at Chesil. Tidal elevations from Weymouth (NSLTF (POL))

13 UK Met Office surface pressure charts
This intensive storm resulted from the development of an extensive, complex, deep low pressure system (central pressure 946 hPa), which transited rapidly across the southern half of the UK, filling slightly to 966hPa (Figures 5 to 6). The storm generated a long-lasting storm surge of nearly 0.8m at Weymouth. Although the peak of the storm occurred 4 hours after HW, the conditions at High Water (about 09:00), saw waves in excess of 4m, a near-equinoctial spring tide, and a storm surge of 0.63m to give a combined SWL elevation (at Weymouth) of 2.11m OD. Waves were from the SW, which is the direction of highest exposure at Chesil. UK Met Office surface pressure charts

14 Annual Tide Gauge Reports
Well-surveyed, timing, accurate instruments etc. Tide gauges operated to GLOSS standards, where possible, with QC to ESEAS standards

15 Annual Tide Gauge Reports
Datum information Site characteristics Service history Measurement method

16 Tidal elevations (CD and OD)

17 Residuals

18 Tidal surge (residual)
Extremes Mean Sea Level

19

20 Start Bay Photo: EMU Limited


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