Low-Frequency Fluctuations in the Strait of Gibraltar from MEDALPFX Sea Level Data

Garrett, Chris; Akerley, John; Thompson, Keith R.

doi:10.1175/1520-0485(1989)019<1682:lffits>2.0.co;2

Cited by 26 publications

(9 citation statements)

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“…In the North Atlantic, data from Bermuda have been used in many studies of sea-level variations in the sub-tropical gyre and along the North American Atlantic coastline (Sturges & Hong 1995;Thompson & Mitchum 2014;Woodworth et al 2014). Several papers have used Gibraltar and nearby Spanish and North African data in studies of exchange flows between the Atlantic and Mediterranean (Garrett et al 1989). In the Indian Ocean, longterm changes in sea level in the Chagos Archipelago have been investigated using data from the tide gauge in Diego Garcia (Dunne et al 2012).…”

Section: Scientific Applicationsmentioning

confidence: 88%

Sea-level monitoring in the British Overseas Territories

Woodworth

Hibbert

2015

Journal of Operational Oceanography

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A review is conducted on the status of sea-level monitoring in the British Overseas Territories (BOTs), showing where measurements have been made in the last two decades by various groups and thereby indicating where investments in future recording are needed. The sea level has risen in every territory since the early 1990s, and is predicted to increase by approximately 0.25-1.0 m by the end of the twenty-first century, depending on the emissions scenario. As a result, it is maintained that sea-level monitoring is needed in all BOTs, both for local coastal applications and as British contributions to the worldwide sea-level monitoring programme.

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Section: Scientific Applicationsmentioning

confidence: 88%

Sea-level monitoring in the British Overseas Territories

Woodworth

Hibbert

2015

Journal of Operational Oceanography

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“…Obtain amplitude and phase variation of the T signal, A m (t) and φ m (t), by application of complex demodulation (Garrett et al, 1989;Bruno et al, 1996;Mañanes, 1996) at the T frequency on distorted T signal series.…”

Section: The Application Of the Methods On Observed Tidal Recordsmentioning

confidence: 99%

An experimental method to investigate the role of low frequency phenomena in the generation of tidal residues

Bruno¹,

Mañanes²,

Alonso³

et al. 1999

Sci. Mar.

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SUMMARY: In this work a method to estimate the contribution to tidal residues originated by non-linear interaction between tides and low frequency phenomena is presented. In order to perform the validation, the method is applied on current data series taken from the Strait of Gibraltar which allows us to find a clear relationship between current tidal residues and low frequency fluctuations in the flow, which may be explained in terms of the non-linear interaction between tidal and sub-inertial signals in the current velocity.

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“…On the other hand, the driving force of the subinertial fluxes has been related to the air pressure fluctuations over the Mediterranean basin (Crepon 1965;Garrett et al 1989;Candela et al 1989Candela et al , 1990. Subinertial and tidal flows have a similar distribution with the maximum values at Camarinal sill decreasing to the east and west of the sill (Pillsbury et al 1987).…”

Section: Introductionmentioning

confidence: 93%

“…Mañ anes et al (1998) studied the interaction of the M2 tidal wave with the subinertial barotropic flows; Tsimplis (2000) gave the structure of the vertical modes for waves on various time scales but for the vertical modes associated to the long tidal waves the results are not definite. The other considered source of perturbations is the fluctuating field of air pressure over the Mediterranean basin studied by Crepon (1965) and Garrett et al (1989) among others.…”

Section: Subinertial Currents In the Strait Of Gibraltarmentioning

confidence: 99%

“…They can be considered as barotropic and responsible for 93.4 and 84% motion of the semidiurnal and the subinertial frequency band, respectively ). Garrett (1989) showed the relationship between the non-astronomical signal of M2 in the water column and the fluctuations of subinertial currents along the Strait. Tsimplis (2000) and Bruno et al (2002) explained the vertical structure of currents in the Strait of Gibraltar and Mañ anes et al (1998) showed that the distortions of the barotropic M2 wave are correlated with the barotropic mode of the subinertial currents.…”

Section: Introductionmentioning

confidence: 99%

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On the effect of subinertial phenomena on the internal lee waves generation in the Strait of Gibraltar

Rosario¹,

Ballesteros²,

Durán³

2006

Stoch Environ Res Ris Assess

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The generation of internal lee waves (ILW) in the Strait of Gibraltar takes place in the main sill where the tidal flow interacts with a submarine obstacle. The tidal flow is perturbed by subinertial phenomena of different nature summarized in the subinertial currents that can inhibit the ILW generation. The authors present an attempt to randomize the problem by the introduction of a Gaussian noise in the Taylor-Goldstein equation. The random number sets are generated from the statistical distribution of the previously isolated random part of the subinertial currents from experimental data taken in the area during the Gibraltar Experiment 94-96. The effect of the noise is translated into a continuous spreading of the spectrum around the solution of the noise-free problem. A stability analysis is carried out in order to determine the single neutral modes of oscillations and the phase space is divided onto regions of stability and instability as a function of the inflowing subinertial current. The methodology and results could be useful for the design and timing of oceanographic surveys in straits where the ILWs occur.

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Low-Frequency Fluctuations in the Strait of Gibraltar from MEDALPFX Sea Level Data

Cited by 26 publications

References 0 publications

Sea-level monitoring in the British Overseas Territories

Sea-level monitoring in the British Overseas Territories

An experimental method to investigate the role of low frequency phenomena in the generation of tidal residues

On the effect of subinertial phenomena on the internal lee waves generation in the Strait of Gibraltar

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