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| Sultan, Sar; Ahmad, F. |
| Surface heat fluxes for the Gulf of Aden have been estimated using bulk formulae. The annual averages of sensible, latent and net back radiation fluxes are -16, 43 and 52 W m(-2), respectively. The annual mean of observed solar radiation is 192 W m(-2), thus the annual heat surplus amounts to 113 W m(-2). This is equivalent to a total energy of 2.5 x 10(13) W, considering the surface area of the Gulf to be 220 x 10(3) km(2). Two processes seem to balance the heat gain: upwelling and water exchange with the Red Sea and with the Arabian Sea. Upwelling appears to be a major diffuser of the heat accumulated by the surface processes. About 48% (1.2 x 10(13) W) of the heat gain is lost by upwelling. The net annual advective heat flow into the Red Sea due to... |
| Tipo: Text |
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| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20464/18136.pdf |
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| Ahmad, F; Sultan, Sar; Moammar, Mo. |
| The Atlantis II Deep is located at about 21.5 degrees N within a deep trench which divides the Red Sea along the mid-axis. Data from the Atlantis II mooring, maintained during January-February 1978, provide valuable information about residual current distribution over the whole water column. The residual currents have speeds of 20 cm/s at the level of surface current meter, decreasing to 1.5 cm/s at about 250 m depth. The dominant direction over this depth level is southeast in January and changes to northeast in February. From 250 m down to the bottom the dominant direction is north-northwest and the residual speeds range between 1.5 and 3.0 cm/s at different depth levels. The weighted depth-mean residual current speed from surface to 250 m is about 7.7... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20870/18488.pdf |
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| Sultan, Sar; Ahmad, F; Elghribi, Nm. |
| 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... |
| Tipo: Text |
Palavras-chave: Niveau de la mer; Tension du vent; Analyse spectrale; Mer Rouge; Sea leve; Wind stress; Spectral analysis; Red Sea. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00096/20766/18392.pdf |
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