Record number :
2295723
Title of article :
The Red Sea outflow regulated by the Indian monsoon
Author/Authors :
Aiki، نويسنده , , Hidenori and Takahashi، نويسنده , , Keiko and Yamagata، نويسنده , , Toshio، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Pages :
21
From page :
1448
To page :
1468
Abstract :
To investigate why the Red Sea water overflows less in summer and more in winter, we have developed a locally high-resolution global OGCM with transposed poles in the Arabian peninsula and India. Based on a series of sensitivity experiments with different sets of idealized atmospheric forcing, the present study shows that the summer cessation of the strait outflow is remotely induced by the monsoonal wind over the Indian Ocean, in particular that over the western Arabian Sea. During the southwest monsoon (May–September), thermocline in the Gulf of Aden shoals as a result of coastal Ekman upwelling induced by the predominantly northeastward wind in the Gulf of Aden and the Arabian Sea. Because this shoaling is maximum during the southwest summer monsoon, the Red Sea water is blocked at the Bab el Mandeb Strait by upwelling of the intermediate water of the Gulf of Aden in late summer. The simulation also shows the three-dimensional evolution of the Red Sea water tongue at the mid-depths in the Gulf of Aden. While the tongue meanders, the discharged Red Sea outflow water (RSOW) (incoming Indian Ocean intermediate water (IOIW)) is always characterized by anticyclonic (cyclonic) vorticity, as suggested from the potential vorticity difference.
Keywords :
Stretched-coordinate OGCM , Coastal upwelling , Monsoon winds , Subsurface tongue
Journal title :
Continental Shelf Research
Serial Year :
2006
Link To Document :
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