Study of Surface Fronts in the Oman Sea

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Yazdan far Salar; Ashtari Amir; AKBARINASAB MOHAMMAD; DELBARI ABOLFAZL

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Journal: HYDROPHYSICS Year:2018 | Volume:4 | Issue:1 Page(s): 19-31

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Title

Study of Surface Fronts in the Oman Sea

Author(s)

Yazdan far Salar | Ashtari Amir | AKBARINASAB MOHAMMAD | DELBARI ABOLFAZL | Issue Writer Certificate

Keywords

MITgcmQ1

Oman SeaQ2

FrontQ3

Ras Al HaddQ1

CycloneQ1

Baroclinic instabilityQ1

Rossby radius deformationQ1

Abstract

In the present study, the MITgcm model was used to simulate the surface Front of the Oman Sea. The area under study is part of the Strait of Hormuz and the Oman Sea (22. 5-27. 3° N, 56. 2-61. 7° E). The initial data fed to the model are temperature, salinity, wind, net heat flux, evaporation and precipitation. The model was run for 15 years to reach a stability. Comparison of model outputs with measurement data (measurement data as well as satellite data) shows a good agreement. The results of the model indicate the presence of the Ras Al Hadd Front on the southern shores of the Oman Sea, the width and breadth of which changed spatially and temporally, being wider in winter due to northwest wind, and being less wider in summer and autumn. The existence of Cyclones with more radius in winter and spring is observable on the Oman Sea surface. In summer and autumn, with increasing instability, antiCyclones on the surface is seen which is in agreement with previous modeling and observation results. The density in the center of these Cyclones reaches 1026 kg/m3. The maximum density difference between northern and southern Oman Sea in winter is calculated as (1-3 kg/m3) and the minimum density difference in autumn as (0. 55 kg/m3). Increasing the horizontal gradient along the Front leads to an increase in vertical velocity and Baroclinic instability. The depth of the Front in winter was to the maximum of 80m, in spring to the minimum of 55m, and in summer and autumn was 60m. The buoyancy frequency was equal to 0. 007 s-1 in winter, 0. 023 s-1 in spring and, 0. 022 s-1 in summer and autumn. And the ratio of the wavelength that has the highest growth to Rossby radius deformation d in winter was equal to 1. 5, in spring 0. 65 and in summer and autumn 0. 61. The calculated value in winter is closer to experimental value.

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APA: Copy

Yazdan far, Salar, Ashtari, Amir, AKBARINASAB, MOHAMMAD, & DELBARI, ABOLFAZL. (2018). Study of Surface Fronts in the Oman Sea. HYDROPHYSICS, 4(1 ), 19-31. SID. https://sid.ir/paper/264861/en

Vancouver: Copy

Yazdan far Salar, Ashtari Amir, AKBARINASAB MOHAMMAD, DELBARI ABOLFAZL. Study of Surface Fronts in the Oman Sea. HYDROPHYSICS[Internet]. 2018;4(1 ):19-31. Available from: https://sid.ir/paper/264861/en

IEEE: Copy

Salar Yazdan far, Amir Ashtari, MOHAMMAD AKBARINASAB, and ABOLFAZL DELBARI, “Study of Surface Fronts in the Oman Sea,” HYDROPHYSICS, vol. 4, no. 1 , pp. 19–31, 2018, [Online]. Available: https://sid.ir/paper/264861/en

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