Sea-level response to atmospheric forcing along the north coast of Persian Gulf |
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| Authors: | S Hassanzadeh A Kiasatpour F Hosseinibalam |
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| Institution: | (1) Physics Department, Faculty of Sciences, University of Isfahan, Isfahan, Iran |
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| Abstract: | Summary Data from tide gauges (1990–1999) at Bandar Abbas and Bushehr combined with atmospheric data at both stations are utilized
to investigate the mean sea-level (MSL) response to meteorological forcing functions along the north coast of the Persian
Gulf. The relations between MSL and forces due to air pressure, air temperature and local wind are examined. The characteristics
of variability of each field are analyzed using the spectral analysis method. The annual cycle is dominant in the sea-level,
atmospheric pressure, air temperature and wind spectra. The influence of local meteorological functions are quantified using
forward stepwise regression techniques. The results suggest that 71.5% and 71.2% variations in the MSL of Bandar Abbas and
Bushehr stations are due to meteorological forces at each stations. The model indicates that the most significant influence
on the observed variation of MSL at Bandar Abbas is air pressure, while at Bushehr is air temperature. The results of multivariate
and simple regression show that these parameters are highly intercorrelated. The sea-level is not significantly correlated
with the monthly and winter NAO and Monsoon in the Persian Gulf. The remaining variations are due to density of sea water
(steric effect), which has considerable influence on the sea-level variations, and coastal upwelling. |
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