Sea-Level Science

Pugh, David; Woodworth, Philip L.

doi:10.1017/cbo9781139235778

Cited by 390 publications

(63 citation statements)

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“…An increase of the water depth can produce changes in the resonance characteristics of shelfs, in the location of amphidromes and in shallow areas, a reduction of frictional effects that in turn affect overtides such as the M4 as we observe in the RdlP (Pugh and Woodworth, 2014). In Figure 8, we present the 19 years running average of the WLs in Buenos Aires and Mar del Plata and their respective GDTR series showing the co-evolution of the two variables (time series and scatter plot).…”

Section: Tidal Analysismentioning

confidence: 63%

“…The asymmetry of the tidal curve depends on the phase difference between the M2 and M4 constituents (see e.g., Pugh and Woodworth, 2014). In both locations, we find that the phases of both constituents show a positive trend, which is more pronounced for the M4 phase.…”

Section: Tidal Analysismentioning

confidence: 66%

“…In shallow water, the asymmetry of the tidal curve is generally characterized by a shorter flood phase with stronger currents and a longer ebb phase with weaker currents (Pugh and Woodworth, 2014). We use the ratio between the annual mean duration of the ebb and flood phases as a measure of the asymmetry of the tidal curve (Figure 5).…”

Section: Tidal Analysismentioning

confidence: 99%

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Long-Term Trends and Variability of Water Levels and Tides in Buenos Aires and Mar del Plata, Argentina

Santamaria-Aguilar¹,

Schuerch

Vafeidis³

et al. 2017

Front. Mar. Sci.

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We present an analysis of the long-term trends and variability of extreme water and tidal levels and the main tidal constituents using long-term records from two tide gauges in the wider region of the Rio de la Plata estuary: Buenos Aires (1905Aires ( -2013 and Mar del Plata (1956. We find significant long-term trends in both tidal levels and the main tidal constituents (M2, S2, K1, O1, and the overtide M4) from a running harmonic analysis in both locations. The tidal range decreased on average 0.63 mm y −1 , as a result of an increase of the low water levels and a decrease of the high water levels. We also find a secular decrease in the amplitude of the semi-diurnal constituents and an increase of the diurnal ones, but of different magnitudes at each location, which suggests that different processes are producing these changes. In Buenos Aires, an increase of river discharge into the estuary seems to reduce the tidal range by hampering the propagation of the tidal wave into the estuary, whereas no influence of river discharge on water and tidal levels can be detected in Mar del Plata. We believe that other factors such as thermohaline changes or the rise of mean sea-level may be responsible for the observed tidal range decrease. Despite the tidal long-term trends, we find no significant trends in the meteorological component of the tide-gauge records other than an increase in the mean sea-level. In addition, we explore teleconnections between the variability of the meteorological component of the tide-gauge records and climate drivers.

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Section: Tidal Analysismentioning

confidence: 63%

Section: Tidal Analysismentioning

confidence: 66%

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Long-Term Trends and Variability of Water Levels and Tides in Buenos Aires and Mar del Plata, Argentina

Santamaria-Aguilar¹,

Schuerch

Vafeidis³

et al. 2017

Front. Mar. Sci.

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“…The script performs a first selection of records suitable for least squares harmonic analysis, that is: the period of the observations of each record must be larger than 1 year. The choice of this minimum duration is based on the Rayleigh criterion for tidal constituent separation (Pugh and Woodworth ()). The time series length is measured after rejecting individual observations for unsuitable flags.…”

Section: Data Production Methodsmentioning

confidence: 99%

TICON: TIdal CONstants based on GESLA sea‐level records from globally located tide gauges

Piccioni

Dettmering

Bösch

et al. 2019

Geoscience Data Journal

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The TICON (TIdal CONstants) dataset contains harmonic constants of 40 tidal constituents computed for 1,145 tide gauges distributed globally. The tidal estimations are based on publicly available sea level records of the second version of the Global Extreme Sea Level Analysis (GESLA) project and were derived through a least squares‐based harmonic analysis on the single time series. A preliminary screening was performed on all records to exclude doubtful observations. Only the records containing more than 70% of valid measurements were processed, that correspond to 89.7% of the total 1,276 original public GESLA records. The results are stored in a text file, and include additional information on the position of the stations, the starting and ending years of the analysed record, the estimated error of the fit, a code that corresponds to the source of the record and additional information on the single time series. In ocean tide models, data from in situ stations are used for validation purposes, and TICON is a useful and easy‐to‐handle data set that allows the users to select the records according to different criteria most suitable for their purposes. The data are provided with DOI identification in the PANGAEA repository.

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“…After subtracting MSL fluctuations and the astronomical tide, the remaining water level or nontidal residual also contains the interaction between the tide and the surge component. This interaction occurs mainly in shallow water areas and is caused by two processes: (1) wind stress (τ s ) being more effective in generating storm surges in low water (hereafter LW) levels due to the fact that the surface stress (F s ) is inversely proportional to water depth (equation (1) and (2)) the rise of water caused by the wind stress increases the speed (c) of the tidal wave propagation, which in shallow waters depends on the water depth (equation (2); Pugh & Woodworth, 2014).…”

Section: Introductionmentioning

confidence: 99%

Are Extreme Skew Surges Independent of High Water Levels in a Mixed Semidiurnal Tidal Regime?

Santamaria-Aguilar

Vafeidis

2018

JGR Oceans

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Based on previous studies of tide‐gauge records from locations with semidiurnal tidal regimes, extreme skew surges are always assumed independent of the high water (HW). However, differences in water depth between HW peaks of semidiurnal tidal regimes can be much lower than those in mixed semidiurnal regimes, where one daily HW is higher than the other. We statistically analyze tide‐gauge records of 15 sites worldwide with a mixed semidiurnal regime and find that for approximately half of these sites extreme skew surges occur more often during smaller HWs. This dependence is not caused by seasonality effects, and the places that show dependence are all located in areas with a shallow continental shelf, thus indicating possible tide‐skew surge interactions. In those cases where dependence exists, using the skew surge does not seem to offer any advantages over the nontidal residual.

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Sea-Level Science

Cited by 390 publications

References 0 publications

Long-Term Trends and Variability of Water Levels and Tides in Buenos Aires and Mar del Plata, Argentina

Long-Term Trends and Variability of Water Levels and Tides in Buenos Aires and Mar del Plata, Argentina

TICON: TIdal CONstants based on GESLA sea‐level records from globally located tide gauges

Are Extreme Skew Surges Independent of High Water Levels in a Mixed Semidiurnal Tidal Regime?

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