Tide Predictions in Shelf and Coastal Waters: Status and Prospects

Ray, Richard D.; Egbert, G. D.; Erofeeva, Svetlana Y.

doi:10.1007/978-3-642-12796-0_8

Cited by 67 publications

(61 citation statements)

References 58 publications

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“…These models all represent the open ocean tide excellently, and for our purposes can be considered as almost identical, but they are known to contain significant (and model-dependent) uncertainties near the coast, where tide gauges are located in estuaries and harbours and where shallow-water constituents such as M4 and M6 will vary considerably over short distances (see a discussion of coastal tides by Ray et al 2011).…”

Section: Global Distributions Of the Main Contributionsmentioning

confidence: 99%

Differences between mean tide level and mean sea level

Woodworth

2016

J Geod

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This paper discusses the differences between Mean Tide Level (MTL) and Mean Sea Level (MSL) as demonstrated using information from a global tide gauge data set. The roles of the two main contributors to differences between MTL and MSL (the M4 harmonic of the M2 semidiurnal tide, and the combination of the diurnal tides K1 and O1) are described, with a particular focus on the spatial scales of variation in MTL-MSL due to each contributor. Findings from the tide gauge data set are contrasted with those from a state-of-the-art global tide model. The study is of interest within tidal science, but also has practical importance regarding the type of mean level used to define land survey datums. In addition, an appreciation of MTL-MSL difference is important in the use of the historical sea level data used in climate change research, with implications for some of the data stored in international databanks. Particular studies are made of how MTL and MSL might differ through the year, and if MTL is measured in daylight hours only, as has been the practice of some national geodetic agencies on occasions in the past.

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Section: Global Distributions Of the Main Contributionsmentioning

confidence: 99%

Differences between mean tide level and mean sea level

Woodworth

2016

J Geod

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“…However, there are many other applications where the most accurate tidal information is a necessity, such as in the computation of extreme levels for coastal engineering. Another application which has recently become apparent is in the optimal exploitation of satellite radar altimetry in shelf seas (Cippolini et al, 2009;Ray et al, 2010). Tidal prediction schemes and tidal models that can represent the long term tidal variability discussed above are certain to find application in the coastal and oceanographic communities.…”

Section: Timing or Calibration Errors Or Other Data Irregularitiesmentioning

confidence: 99%

A survey of recent changes in the main components of the ocean tide

Woodworth

2010

Continental Shelf Research

151

148

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Changes in the ocean tide during the 20 th century have been reported for several parts of the world by different authors. However, it has not always been clear whether the observed changes have been local or regional in scale. This paper reports on a survey of tidal changes in recent decades using a quasi-global data set of tide gauge information. Little evidence has been found in Europe or the Far East (including Australasia and Asia) for the extensive regional changes to the main tidal constituents reported recently for N America. However, evidence for change in smaller regions can be identified wherever the density of tide gauge information allows. Therefore, it seems that tidal changes may be commonplace around the world, although not necessarily with large spatial scales.All of the reported changes have been difficult to explain. However, it is hoped that quasi-global surveys such as the present one may eventually provide further insights.

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“…Another consideration, which will not be discussed in detail in this article, but that is surely worth to mention was a coincident high astronomic tide that clashed with the strong barometric high tide (mean sea level pressure was quite low) causing record sea level rise up to 60 cm during the seastorm peak (Ray et al, 2011;and Padman and Erofeeva, 2004). This contributed to coastal wave penetration and might also explain why local reporters visually estimated the wave height, when breaking at coast at more than 6 m (Wang et al, 2008).…”

Section: Description Of the Eventmentioning

confidence: 99%

A study of the 1 and 2 January 2010 sea-storm in the Ligurian Sea

Pasi

Orlandi

Onorato³

et al. 2011

Adv. Sci. Res.

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Abstract. During the last days of 2009 and the first days of 2010, a wide and deep low pressure system over Western Europe generated a very extended and strong southerly pressure gradient on the whole Western Mediterranean Sea with a resulting very rough to high sea state. Over the Ligurian Sea (North Western Mediterranean) the resulting sea state was a combination of a very tuned (in both frequency and direction) swell coming from the south-west, with nearly oceanic peak wave period, and a broader north-westerly wind sea with shorter period. This kind of sea state, not extreme in terms of significant wave height, caused unusual widespread damages to Ligurian coastal structures.In this study, authors investigated the structure of such a combined sea state by analysing numerical weather prediction outputs coming from atmospheric and wave models and comparing them with data coming from ondametric buoys and meteorological stations located in the Ligurian Sea area. As a result, it was found that the forecasting model chain almost correctly predicted the wave height in a first phase, when the sea state was only due to the first south-westerly swell peak, while significantly underestimated the combined sea state, when also the second north-westerly wind sea developed and interacted with the first one.By analysing the structure of directional wave spectra forecasted by the operational wave model and measured by the buoys, authors have attempted to find out the reasons for model deficiencies in forecasting the time evolution of significant parameters characterising the sea state.

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Tide Predictions in Shelf and Coastal Waters: Status and Prospects

Cited by 67 publications

References 58 publications

Differences between mean tide level and mean sea level

Differences between mean tide level and mean sea level

A survey of recent changes in the main components of the ocean tide

A study of the 1 and 2 January 2010 sea-storm in the Ligurian Sea

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