Seasonal variation of the M 2 tide

Müller, Malte; Cherniawsky, Josef Y.; Foreman, Michael; Storch, Jin‐Song von

doi:10.1007/s10236-013-0679-0

Cited by 110 publications

(136 citation statements)

References 41 publications

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“…In addition, changes in the atmospheric dynamics and winddriven circulation may produce changes in the MSL, depth of the mixed layer and sea surface temperature that may affect the tide (Jay, 2009;Müller, 2011;Müller et al, 2014). However, no significant correlation is found between the tidal anomalies in Mar del Plata and any Climate Index.…”

Section: Tidal Analysismentioning

confidence: 62%

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: 62%

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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“…An update by Pelling et al (2013) highlighted a key remaining uncertainty in understanding this response-whether the water is assumed to be contained by a sea wall or allowed to flood the land. Recent work, based on seasonal variations in major tidal constituents (Gräwe et al 2014;Müller et al 2014) also suggests the need to consider changes in stratification on the continental shelf in shallow seas, which can alter the eddy viscosity and profile of currents with depth. See Sect.…”

Section: Future Changes In Extreme Sea Levelmentioning

confidence: 99%

Projected Change—North Sea

Schrum

Lowe

Meier

et al. 2016

North Sea Region Climate Change Assessment

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Increasing numbers of regional climate change scenario assessments have become available for the North Sea. A critical review of the regional studies has helped identify robust changes, challenges, uncertainties and specific recommendations for future research. Coherent findings from the climate change impact studies reviewed in this chapter include overall increases in sea level and ocean temperature, a freshening of the North Sea, an increase in ocean acidification and a decrease in primary production. However, findings from multi-model ensembles show the amplitude and spatial pattern of the projected changes in sea level, temperature, salinity and primary production are not consistent among the various regional projections and remain uncertain. Different approaches are used to downscale global climate change impacts, each with advantages and disadvantages. Regardless of the downscaling method employed, the regional studies are ultimately affected by the forcing global climate models. Projecting regional climate change impacts on biogeochemistry and primary production is currently limited by a lack of consistent downscaling approaches for marine and terrestrial impacts. Substantial natural variability in the North Sea region from annual to multi-decadal time scales is a particular challenge for projecting regional climate change impacts. Natural variability dominates long-term trends in wind fields and strongly wind-influenced characteristics like local sea level, storm C. Schrum

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“…A 10-year STORMTIDE simulation is used in the present study, and a detailed description on the set-up of the model simulation including atmospheric forcing, restoring schemes, and physical parametrization can be found in Müller et al (2014). The hourly output of 32 days of sea level and velocities, starting 1 January, has been used for a harmonic analysis with respect to several tidal constituents (Foreman et al, 2009).…”

Section: Numerical Modellingmentioning

confidence: 99%

Tidal forcing, energetics, and mixing near the Yermak Plateau

2015

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Abstract. The Yermak Plateau (YP), located northwest of Svalbard in Fram Strait, is the final passage for the inflow of warm Atlantic Water into the Arctic Ocean. The region is characterized by the largest barotropic tidal velocities in the Arctic Ocean. Internal response to the tidal flow over this topographic feature locally contributes to mixing that removes heat from the Atlantic Water. Here, we investigate the tidal forcing, barotropic-to-baroclinic energy conversion rates, and dissipation rates in the region using observations of oceanic currents, hydrography, and microstructure collected on the southern flanks of the plateau in summer 2007, together with results from a global high-resolution ocean circulation and tide model simulation. The energetics (depthintegrated conversion rates, baroclinic energy fluxes and dissipation rates) show large spatial variability over the plateau and are dominated by the luni-solar diurnal (K 1 ) and the principal lunar semidiurnal (M 2 ) constituents. The volumeintegrated conversion rate over the region enclosing the topographic feature is approximately 1 GW and accounts for about 50 % of the M 2 and approximately all of the K 1 conversion in a larger domain covering the entire Fram Strait extended to the North Pole. Despite the substantial energy conversion, internal tides are trapped along the topography, implying large local dissipation rates. An approximate local conversion-dissipation balance is found over shallows and also in the deep part of the sloping flanks. The baroclinic energy radiated away from the upper slope is dissipated over the deeper isobaths. From the microstructure observations, we inferred lower and upper bounds on the total dissipation rate of about 0.5 and 1.1 GW, respectively, where about 0.4-0.6 GW can be attributed to the contribution of hot spots of energetic turbulence. The domain-integrated dissipation from the model is close to the upper bound of the observed dissipation, and implies that almost the entire dissipation in the region can be attributed to the dissipation of baroclinic tidal energy.

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Seasonal variation of the M 2 tide

Cited by 110 publications

References 41 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

Projected Change—North Sea

Tidal forcing, energetics, and mixing near the Yermak Plateau

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