Evaluation of wind induced currents modeling along the Southern Caspian Sea

Bohluly, Asghar; Esfahani, Fariba Sadat; Namin, Masoud Montazeri; Chegini, Fatemeh

doi:10.1016/j.csr.2017.12.008

Cited by 28 publications

(15 citation statements)

References 16 publications

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“…The model is run daily starting 6 pm for 1.25 days with 6 hours of spin-up time that is discarded. Bohluly et al (2018) finds reasonable agreement between modelled and observed winds at several offshore and nearshore buoys. The wind stress is calculated from the 10 m elevation wind velocity from the WRF model using drag coefficients from Large and Pond (1981).…”

Section: Data and Data Processingsupporting

confidence: 65%

“…Winds at 10 m above the water surface are extracted from a Weather Research and Forecasting (WRF) model configured for the Caspian Sea region, interpolated to the location of ADCP measurement stations. The WRF model, described at length in Bohluly et al (2018), is configured with two nests. The 42 × 52 outer domain has a resolution of 0.3 • and the 94 × 124 inner domain grid has a resolution of 0.1 • .…”

Section: Data and Data Processingmentioning

confidence: 99%

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Currents Generated by the Sea Breeze in the Southern Caspian Sea

Masoud

Pawlowicz

2021

Preprint

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Abstract. The sea breeze system is the dominant atmospheric forcing at high frequency in the southern Caspian Sea. Here, we describe and interpret current meter observations on the continental margins of the southern Caspian from 2013 to 2014 to identify and characterize the water column's response to the sea breeze system. Time series analysis provides evidence for diurnal baroclinic current signals of O (0.02 m s−1) and surface height changes of O (0.03 m). A two-layer model, including interfacial and bottom friction is developed to further investigate the sea breeze response. This model is able to reproduce the structure, amplitudes, and phases of observed diurnal current fluctuations, explaining half of the variance in observational current response at frequencies at 1 cpd and higher. The sea breeze response thus results in a “tide-like” daily cycle which is actually linked to the local forcing all along the southern Caspian coast.

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Section: Data and Data Processingsupporting

confidence: 65%

Section: Data and Data Processingmentioning

confidence: 99%

Currents Generated by the Sea Breeze in the Southern Caspian Sea

Masoud

Pawlowicz

2021

Preprint

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“…So for consistency we use winds at 10 m above the water surface, which are extracted from a Weather Research and Forecasting (WRF) model configured for the Caspian Sea re-gion, interpolated to the location of ADCP measurement stations. The WRF model, described at length in Bohluly et al (2018), is configured with two nests. The 42 × 52 outer domain has a resolution of 0.3 • , and the 94 × 124 inner domain grid has a resolution of 0.1 • .…”

Section: Data and Data Processingmentioning

confidence: 99%

“…The model is run daily starting at 18:00 for 1.25 d with 6 h of spin-up time that is discarded. The accuracy of modeled winds has been evaluated by Bohluly et al (2018) and Ghader et al (2014). The latter compared model winds with a variety of observed wind products over the Caspian Sea including one offshore buoy, three nearshore buoys, and also data from the QuikSCAT satellite product.…”

Section: Data and Data Processingmentioning

confidence: 99%

Currents generated by the sea breeze in the southern Caspian Sea

Masoud

Pawlowicz

2022

Ocean Sci.

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Abstract. The sea breeze system is the dominant atmospheric forcing at high frequency in the southern Caspian Sea. Here, we describe and interpret current meter observations on the continental margins of the southern Caspian from 2012 to 2013 to identify and characterize the water column's response to the sea breeze system. Time series analysis provides evidence for diurnal baroclinic current signals of O(0.02 m s−1) and surface height changes of O(0.03 m). A two-layer model, including interfacial and bottom friction, is developed to further investigate the sea breeze response. This model is able to reproduce the structure, amplitudes, and phases of observed diurnal current fluctuations, explaining half of the variance in observational current response at frequencies at 1 cpd and higher. The sea breeze response thus results in a “tide-like” daily cycle, which is actually linked to the local forcing all along the southern Caspian coast.

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“…The periodic subinertial currents on the shelf in the second interval are probably not induced by the local winds, which are weak. It is clearly noticeable that due to the collision of northeast and southwest wind fronts strong wind events historically occur at the west coast of the CS (Bohluly et al 2018). It is therefore natural to consider this region as the generation area for CSWs.…”

Section: Study Area and Observationmentioning

confidence: 99%

Stokes Drift in Topographic Waves over an Enclosed Basin Shelf

Ghaffari

Weber

Nøst

et al. 2020

Journal of Physical Oceanography

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The effect of the continental shelf wave on the flow field over the southern shelf of the Caspian Sea (CS) as the largest enclosed basin of the world, is investigated. Considerable currents with subinertial time scales are observed over the continental shelf in the southern CS. For variations in the surface layer with typical periods of 1 day, local episodic wind events appear to be the driving force. For longer time scales, it is suggested that the observed currents are due to passing continental shelf waves. Measurements over the continental shelf and shelf slope, showing periods of 2–6 days, indicate the presence of such waves. Combined with theory and numerical modeling, the amplitude of the continental shelf wave modes at the coast is assessed from current meter observations. It is demonstrated that the mean drift velocity (the Stokes drift) for long continental shelf waves is determined entirely by the shelf geometry. For the actual shelf mode, it is shown that the associated Stokes drift constitute a nonnegligible mean current along the shelf. This current should be taken into account when assessing the transport of biological material and neutral tracers along the southern coast of the CS.

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Evaluation of wind induced currents modeling along the Southern Caspian Sea

Cited by 28 publications

References 16 publications

Currents Generated by the Sea Breeze in the Southern Caspian Sea

Currents Generated by the Sea Breeze in the Southern Caspian Sea

Currents generated by the sea breeze in the southern Caspian Sea

Stokes Drift in Topographic Waves over an Enclosed Basin Shelf

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