Data/hora: 11/06/2024 13:20:55

Provedor de dados: | 5
País: | France
Título: | Sea level variability in the central Red Sea
Autores: | Sultan, Sar; Ahmad, F; Elghribi, Nm.
Data: | 1996
Ano: | 1996
Palavras-chave: | Niveau de la mer; Tension du vent; Analyse spectrale; Mer Rouge; Sea leve; Wind stress; Spectral analysis; Red Sea.
Resumo: | Analyses of the daily means of the sea level at Jeddah and Port Sudan for the year 1991 reveal that a large proportion (60%) of the energy is concentrated in the seasonal variations. The seasonal signal is approximated as the sum of an annual and semi-annual components. The amplitudes of the annual component are 20.3 and 12.7 cm respective! y and constitute about 44% of the total variance. The amplitudes of the semi-annual cycle are 9.6 cm and 7.7 cm and explain about 10% and 16% of the variance respcctively. At Jeddah cross-spectral anal ysis between the sea-level and the wind stress components shows that the annual cycle is mainly induced by the long-shore component. In contrast no correlation exists between the sea leve! and the cross-shore wind-stress at any frequency. At Port Sudan both components of wind stress contribute significantly to the annual cycle of the sea level. Variations of 3.5-day period are also related to the longshore stress, while those of 2- and 6-day periods are associated with the crossshore stress. The semi-annual cycle is strongly related to the evaporation rate. Cross-spectral analyses between the sea level changes show that Iow frequency variations are coherent across the sea, while high frequency fluctuations are due to local meteorological conditions. Tidal analysis shows that the tide at Jeddah is mixed mainly semi-diurnal with large diurnal inequalities, while at Port Sudan the tide is of diurnal type.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00096/20766/18392.pdf

http://archimer.ifremer.fr/doc/00096/20766/

Editor: | Gauthier-Villars
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-Villars), 1996 , Vol. 19 , N. 5 , P. U1-U1

Fonte:

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