APPLICATION OF CROSS-SPECTRAL ANALYSIS TO COMPUTATIONS OF SEA SURFACE TOPOGRAPHY CASE STUDY: PERSIAN GULF

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SALAVATIZADEH M.R.; AZMOUDEH ARDALAN A.R.

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Journal: Journal of the Earth and Space Physics Year:2008 | Volume:34 | Issue:1 Page(s): 63-76

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Title

APPLICATION OF CROSS-SPECTRAL ANALYSIS TO COMPUTATIONS OF SEA SURFACE TOPOGRAPHY CASE STUDY: PERSIAN GULF

Author(s)

SALAVATIZADEH M.R. | AZMOUDEH ARDALAN A.R. | Issue Writer Certificate

Keywords

LOCAL RESPONSEQ3

MEAN SEA LEVELQ3

SEA SURFACE TOPOGRAPHYQ3

RESPONSE ANALYSISQ3

PERSIAN GULFQ3

Abstract

Due to various effects the geoid does not coincide with the MEAN SEA LEVEL (MSL) but is deviated from it by a separation that is called “Sea Surface Topography” or in short SST. One of the SST computations techniques is the “LOCAL RESPONSE”, which is one of the “response analysis” methods. Using the aforementioned technique the response of the sea surface to various factors such as atmospheric pressure, temperature, wind, etc. can be used for the SST determination. Namely, the sea can be considered as a physical system where the environmental phenomena are its input function and the instantaneous sea level is the output function. Knowing the input and output functions in spectral form, to be determined, is the system itself, which reveals the output upon the frequency character of the input. More specifically, we are going to use the “Cross-Spectral Analysis” for the SST computations and for the case study four coastal stations along the PERSIAN GULF will be considered. These stations are located at: (1) Shahid-Rajaie Port, (2) Kangan Port, (3) Bushehr Port, and (4) Imam Hassan Harbor. According to the numerical results of this study, the overall effect of the environmental factors on the sea level within the wintertime is between +8 and –33 cm. The maximum amount of SST is associated with the Bushehr Port and the minimum with Kangan Port. The maximum SST in Bushehr Port shows the subsidence of the MSL with respect to the geoid and the minimum SST in Kangan Port is associated with the rise of MSL. This finding is consistent with the prevailing sea dynamics in the PERSIAN GULF and the Oman Sea, i.e. Shahid-Rajaie Port being closer to the Oman Sea is more strongly affected by the sea topography and the oceanic currents than Bushehr Port which is away from the Oman Sea. For the practical application of the current study we may refer to the determination of national height datums with respect to the geoid, which are established traditionally with respect to the MSL, by sea level observations at the fundamental tide gauge stations. Knowing the separation of the MSL from the geoid, i.e. SST, we may arrive at a solution to the “height datum unification” problem.

Cites

کاربرد روش عکس العمل محلی با تابع وزنی در تعیین توپوگرافی سطح دریا، بررسی موردی: خلیج فارس

References

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APA: Copy

SALAVATIZADEH, M.R., & AZMOUDEH ARDALAN, A.R.. (2008). APPLICATION OF CROSS-SPECTRAL ANALYSIS TO COMPUTATIONS OF SEA SURFACE TOPOGRAPHY CASE STUDY: PERSIAN GULF. JOURNAL OF THE EARTH AND SPACE PHYSICS, 34(1), 63-76. SID. https://sid.ir/paper/80362/en

Vancouver: Copy

SALAVATIZADEH M.R., AZMOUDEH ARDALAN A.R.. APPLICATION OF CROSS-SPECTRAL ANALYSIS TO COMPUTATIONS OF SEA SURFACE TOPOGRAPHY CASE STUDY: PERSIAN GULF. JOURNAL OF THE EARTH AND SPACE PHYSICS[Internet]. 2008;34(1):63-76. Available from: https://sid.ir/paper/80362/en

IEEE: Copy

M.R. SALAVATIZADEH, and A.R. AZMOUDEH ARDALAN, “APPLICATION OF CROSS-SPECTRAL ANALYSIS TO COMPUTATIONS OF SEA SURFACE TOPOGRAPHY CASE STUDY: PERSIAN GULF,” JOURNAL OF THE EARTH AND SPACE PHYSICS, vol. 34, no. 1, pp. 63–76, 2008, [Online]. Available: https://sid.ir/paper/80362/en

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