Three-dimensional numerical modeling of thermohaline and wind-driven circulations in the Persian Gulf

Hosseinibalam, F.; Hassanzadeh, Smaeyl; Rezaei-Latifi, Ali

doi:10.1016/j.apm.2011.05.040

Cited by 28 publications

(9 citation statements)

References 13 publications

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“…The maximum flow occurs in June whilst the minimum in October, with values 0.2 Sv and 0.08 Sv respectively. Hosseinibalam et al (2011) and Pous et al (2015) found similar seasonal variability and mean transport. Yao and Johns (2010) estimated a value of 0.12 Sv, with maximum transport in summer and minimum transport in winter.…”

Section: Model Assessmentmentioning

confidence: 53%

Variability of water exchanges through the Strait of Hormuz

et al. 2020

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The variability of the water mass exchange between the Arabian Gulf and the Indian Ocean is investigated using a high-resolution (1/36°) ocean model. We focus on the period from December 1996 to March 1998, having as reference in-situ measurements at the Strait of Hormuz. Previous studies, based on models and observations, suggested a perpetual deep outflow, mainly in the southern part of the Strait, and a variable flow in the upper layers. In the present study, we confirm that there is a permanent core of a deep outflow in the Strait at depths greater than 40 m, characterized by high-salinity waters. In addition, we show that there is a seasonal signal in the upper layers net flow in the southern part of the Strait, altering from net inflow during winter/spring to net outflow during summer/fall. The mean annual inflow through the Strait is estimated at 0.22 ± 0.01 Sv and the deep outflow at 0.147 ± 0.01 Sv. The water mass exchange through the Strait is controlled by synoptic processes with high variability net transport fields. These processes characterize the structure and the intensity of the transport patterns, exhibiting two to five days period. On synoptic time scales winds drive an immediate baroclinic flow at the Strait of Hormuz, affecting mostly the upper layers, and a quasi-barotropic flow that peaks approximately 2 days later.

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Section: Model Assessmentmentioning

confidence: 53%

Variability of water exchanges through the Strait of Hormuz

et al. 2020

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“…Salinity and temperature data needed for calculating the complex permittivity at C-band were provided from our previous work Hosseinibalam et al, 2011). These data were simulated by using a 3-D hydrodynamic numerical model and validated by limited direct measurements in the Persian Gulf (see next section).…”

Section: Methodsmentioning

confidence: 99%

Variability of Fresnel surface emissivity of Persian Gulf water in a nadir-viewing direction at C- band

Rezaei-Latifi

2016

Journal of Radiation Research and Applied Sciences

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Polarization C-band Fresnel Persian Gulf a b s t r a c t The knowledge of the sea surface emissivity can be used to design passive and active microwave sensors for ocean remote sensing applications. In this study, the variability of vertical and horizontal polarizations of Fresnel emissivity over the Persian Gulf water at 5 GHz in a nadir-viewing direction are investigated by using Fresnel's equations. Data sets used to compute Fresnel reflection coefficients were provided from our previous studies on hydrodynamic and electromagnetic properties of Persian Gulf water. The calculations indicated that spatial variability of Fresnel emissivity for both vertical and horizontal polarizations were relatively large compared to its temporal variability. The annual domainaveraged mean for vertical emissivity at the C-band was 0.3914, whereas for the horizontal polarization of the emissivity, it was 0.3645 in a nadir-viewing direction.

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“…Previous studies reported that the tidal residual flow influence on the overall circulation in the PG is minimal (less than 0.02 m/s) [ Pous et al ., ], except in a few localized areas (e.g., the Iranian coast and the Strait of Hormuz) where the tidal residuals are large enough to enhance the dominant density‐driven flow [ Thoppil and Hogan , ]. There are many other studies on wind and density driven circulation [ Chao et al ., ; Reynolds , ; Swift and Bower , ; Kämpf and Sadrinasab , ; Ezam et al ., ; Thoppil and Hogan , , ; Hosseinibalam et al ., ; Pous et al ., ]; this paper reviews only tidal residual currents.…”

Section: Introductionmentioning

confidence: 98%

“…As a result, the vertical stability of water column weakens significantly and the baroclinic eddies with diameters of about 40–70 km and speeds of about 0.08– 0.15 m/s form in some parts of the Gulf. In addition, the wind stress leads to shear instability and produce eddies with diameters of 30–120 km and speeds 0.04–0.15 m/s in most parts of the Persian Gulf [ Hosseinibalam et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Effect of subseabed salt domes on Tidal Residual currents in the Persian Gulf

et al. 2016

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Geological studies in the Persian Gulf (PG) have revealed the existence of subseabed salt‐domes. With suitable filtering of a high‐resolution PG seabed topography, it is seen that the domes leave their signature in the seabed, i.e., numerous hills and valleys with amplitudes of several tens of meters and radii from a few up to tens of kilometers. It was suspected that the “shark skin” of the PG seabed may affect the tidal residual flow. The interaction of tidal dynamics and these obstacles was investigated in a nonlinear hydrodynamic numerical tidal model of the PG. The model was first used to characterize flow patterns of residual currents generated by a tidal wave passing over symmetric, elongated and tilted obstacles. Thereafter it was applied to the entire PG. The model was forced at its open boundary by the four dominant tidal constituents residing in the PG. Each tidal constituent was simulated separately. Results, i.e., tidal residual currents in the PG, as depicted by Lagrangian trajectories reveal a stationary flow that is very rich in eddies. Each eddy can be identified with a topographic obstacle. This confirms that the tidal residual flow field is strongly influenced by the nonlinear interaction of the tidal wave with the bottom relief which, in turn, is deformed by salt‐domes beneath the seabed. Different areas of maximum residual current velocities are identified for major tidal constituents. The pattern of trajectories indicates the presence of two main cyclonic gyres and several adjacent gyres rotating in opposite directions and a strong coastal current in the northern PG.

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Three-dimensional numerical modeling of thermohaline and wind-driven circulations in the Persian Gulf

Cited by 28 publications

References 13 publications

Variability of water exchanges through the Strait of Hormuz

Variability of water exchanges through the Strait of Hormuz

Variability of Fresnel surface emissivity of Persian Gulf water in a nadir-viewing direction at C- band

Effect of subseabed salt domes on Tidal Residual currents in the Persian Gulf

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