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IJMS Vol.32(2) [June 2003] >


Title: Sea level changes in the central part of the Red Sea
Authors: Sultan, S. A. R.
Elghribi, N. M.
Keywords: Atmospheric pressure
evaporation
Jeddah
Red Sea
sea level
steric
wind stress
Issue Date: Jun-2003
Publisher: CSIR
Abstract: Daily means of sea level and atmospheric forcing over a period of three years (1991-1993) at Jeddah are examined by spectral and regression methods. The analysis reveals the presence of a large annual and a semi-annual component in the time series. Average amplitudes of the two signals in the sea level changes are 19 and 8 cm, respectively, and account for 58 % of the total variance. The two signals are induced by the combined effect of wind stress and evaporation rate. Wind stress plays a major role in inducing the annual cycle. Sea level is inversely related to the evaporation rate only during the transition periods. Isostatic response of sea level is limited, 4 % of the total variance, and is frequency dependent with observed period of 9 days. Analysis of daily residuals shows that about 78 % of the variance can be modeled by a first order auto-regressive model AR (1).
Page(s): 114-122
ISSN: 0379-5136
Source:IJMS Vol.32(2) [June 2003]

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