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Deep water mass circulation in the Alboran Basin: Measurements - August to November'83: ALBORAN III

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Abstract
The circulation of the deep water mass in the western Alboran Sea is studied. Interaction between the
 
three different water masses, the Atlantic, the Levantine and the Deep Western Mediterranean water,
 
causes complicated flow patterns. Floats and current meters deployed in the northern and the central western Alboran displayed slow and variable current speed. Floats deployed on the Moroccan
 
continental slope moved swiftly along the slope towards Gibraltar with accelerating speed, and then
 
passed through the Strait of Gibraltar and into the Atlantic. Upward bending of isolines across the
 
Moroccan continental slope extended from Gibraltar to 3deg 20'W, and were strongest in the western
 
Alboran Sea. Deep Western Mediterranean water was observed at a depth of less than 300 m near
 
the sill, indicating the passage of this water from the Mediterranean to the Atlantic. Levantine water
 
mass was concentrated in the central Alboran, turning southward near latitude 4deg 40'W; however it
 
never crossed the Moroccan continental slope, and partly continued along longitude 36deg 10'
 
towards Gibraltar. Three floats were deployed in the western Mediterranean at a depth of 60 m to
 
investigate the upper layer circulation. Their tracks did not show the existence of anticyclonic gyre in agreement with the satellite infrared images of the sea surface temperature. This "anomalous"
 
behaviour was visible in the satellite infrared images for the period of at least 6 weeks.
 

URI
http://hdl.handle.net/20.500.12489/164

Report Number
SM-196

Collections
  • Technical Reports

Date
1988/02

Author(s)
Pistek, Pavel

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SM-196-UU.pdf (4.976Mb)

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