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- Title
On an Advective Model of a Ventilated Thermocline.
- Authors
Mirabel, A. P.; Vakulenko, N. V.
- Abstract
A model of an advective thermocline is proposed for the case of continuously stratified Sverdrup circulation with a ventilated layer caused by the divergence of flows in the Ekman layer: an immiscible layer with homogenized vorticity and a layer of abyssal liquid, which applies to anticyclonic gyre waters. The results of calculations for the Atlantic Ocean (region 15–52° N, 0–63° E) carried out with this model are presented. With an abyssal density of 28.0, the values of the surface density and density of the unventilated layer increase to the north from 24.2 to 27.0 and from 27.8 to 27.9, respectively, with an almost zonal distribution; i.e., ventilation zones have latitudinal circles. From calculations of the depths of wind circulation, it follows that the ventilated layer is as deep as 900 m in the northwestern region and rises to 250 m in the southern and eastern parts of the basin. The same tendency is traced for the depth of the gyre, but here there is an increase in depth from 500 to 1500 m. The active dynamics in the ventilating layer and the shadow area on the eastern border are noted. The structure of the thermocline is demonstrated with a typical zonal section, characterizing a much larger isopycnic increment for ventilated layers than in nonventilated layers.
- Subjects
THERMOCLINES (Oceanography); ATMOSPHERIC circulation; VORTEX motion
- Publication
Oceanology (00014370), 2019, Vol 59, Issue 1, p1
- ISSN
0001-4370
- Publication type
Article
- DOI
10.1134/S0001437019010156