Baroclinic Flow and Transient-Tracer Fields in the Canary–Cape Verde Basin

Thiele, Gerhard; Roether, Wolfgang; Schlosser, Peter; Kuntz, Rainer M.; Siedler, Gerold; Stramma, Lothar

doi:10.1175/1520-0485(1986)016<0814:bfattf>2.0.co;2

Cited by 41 publications

(16 citation statements)

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“…Although the North Atlantic 3 He data set as a whole is less extensive than that for tritium, a reasonable picture of the 3 He distribution in the basin has been developed from regional studies (Schlosser, 1985;Thiele et al, 1986;Jenkins, 1987) and from the TTO data set (Jenkjns, 1988).…”

Section: Tritium and 3 Hementioning

confidence: 99%

“…More sophisticated two-dimensional tracer models have also been developed to study subt ropi cal thermocline ventilation (Thiele et al, 1986;Thiele and Sarmiento, 1990). For example, Thiele et al ( 1986) model the CF C and tritium-3 1-Ie distributions in the Canary and Cape…”

Section: Tracer Modelingmentioning

confidence: 99%

“…For example, Thiele et al ( 1986) model the CF C and tritium-3 1-Ie distributions in the Canary and Cape…”

Section: Tracer Modelingmentioning

confidence: 99%

“…To date, few CFC measurements have been reported for the eastern North Atlantic outside of the tropics ( cf. Warmwassersphere P rogram; Thiele et al, 1986). We compare our data with CFC samples collected south of 20°N as part of TTO/TAS , thus providing a "snapshot" of the CFC penetration into the tropical Atlantic over the five year period between 1983 and 1988.…”

Section: 1 Introductionmentioning

confidence: 99%

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A study of North Atlantic ventilation using transient tracers

Doney¹

1991

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Section: Tritium and 3 Hementioning

confidence: 99%

Section: Tracer Modelingmentioning

confidence: 99%

“…For example, Thiele et al ( 1986) model the CF C and tritium-3 1-Ie distributions in the Canary and Cape…”

Section: Tracer Modelingmentioning

confidence: 99%

Section: 1 Introductionmentioning

confidence: 99%

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A study of North Atlantic ventilation using transient tracers

Doney¹

1991

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“…A direct effect of surface sources and sinks is not to be expected in this depth range. The 13-spiral studies of ARMI and STOMMEL (1983) as well as tracer models (THIELE et al, 1986) lead to the conclusion that the water mass distribution in the Central Water of this region is dominated by isopycnal advection and isopycnal mixing. On the other hand, ScnMrrr (1981) found evidence for cross-isopycnal mixing in the Central Water which can be related to double diffusion.…”

Section: Introductionmentioning

confidence: 99%

The relative contributions of advection and isopycnal and diapycnal mixing below the subtropical salinity maximum

Bauer¹,

Siedler²

1988

Deep Sea Research Part A. Oceanographic Research Papers

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Abstract--The spatial distribution of the subtropical salinity maximum is identified using historical and recent data from the eastern North Atlantic. In the regions with high frequency of occurrence of the salinity maximum, the relative contributions of advection, eddy diffusion and double diffusion to the salt balance below the maximum salinity layer are determined. McDoUGALL's (1984, Journal of Physical Oceanography, 14, 1577-1589 salt balance equation for neutral surfaces is used in this analysis. The data base consists of two meridional CID sections along 33* and 270W between 10 ° and 35°N, mean temperature-safinity profiles in 5* x 5* squares presented by EMERY and DEWAR (1982), and mean velocity profiles in 3 ° x 3 ° squares evaluated by STRAMMA (1984, Journal of Marine Research, 42, 537-558).The tropical salinity maximum tongue is found to be quite persistent in its salinity value and its geographic distribution, but less clearly in its vertical or isopycnal position. Double diffusion due to salt-fingering appears to be an important process for the salt balance below the salinity maximum layer. An approximate estimate of the double-diffusive salt flux is obtained. Near the subtropical source region, the double-diffusive salt flux is balanced primarily by isopycnal advection; further to the south it is also balanced by isopycnal eddy diffusion. Maximum doublediffusive fluxes correspond in magnitude to the mean salt flux caused by the excess in evaporation at the surface in the central subtropics. The resulting isopycnal and diapycnal eddy-mixing coefficients derived by a linear inversion technique have the reasonable values of K i = (11 _+ 5) x 102 m2s -1 and Kd = (4 + 2) X 10-5 m 2 s -1. Considering the intermittency of the double-diffusive process, limiting values for the mean eddy-mixing coefficients are determined by neglecting the contribution of the double-diffusive salt fluxes. This leads to Ki = (5 + 2) x 102 m 2 s -1 and Kd = (5 --+ 1) X 10 -5 m 2 s -1 for the isopycnal and diapycnal mixing coefficients, respectively.

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Figs. 29 - 46

Roether¹,

Rhein²

Landolt-Börnstein - Group v Geophysics

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Baroclinic Flow and Transient-Tracer Fields in the Canary–Cape Verde Basin

Cited by 41 publications

References 0 publications

A study of North Atlantic ventilation using transient tracers

A study of North Atlantic ventilation using transient tracers

The relative contributions of advection and isopycnal and diapycnal mixing below the subtropical salinity maximum

Figs. 29 - 46

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