@article{fdi:010044057,
  title = {{A} hydrographic section from {S}outh {A}frica to the southern limit of the {A}ntarctic {C}ircumpolar {C}urrent at the {G}reenwich meridian},
  author = {{G}ladyshev, {S}. and {A}rhan, {M}. and {S}okov, {A}. and {S}peich, {S}abrina},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he properties and circulation of water masses leaving and entering the {A}tlantic {O}cean south of {A}frica are examined using data from a hydrographic and {L}owered acoustic {D}oppler current profiler section from {S}outh {A}frica to the southern limit of the {A}ntarctic {C}ircumpolar {C}urrent ({ACC}). {A}t the upper levels, the {ACC} fronts are well determined using either classical water mass definitions or gradient-based criteria. {W}hile the locations of the {S}ubantarctic {F}ront ({SAF}), {P}olar {F}ront ({PF}), and {S}outhern {ACC} {F}ront ({SACCF}) seem controlled by the neighbouring ridges, that of the {S}ubtropical {F}ront ({STF}) is much influenced in this region (similar to 10 degrees {E}) by northwestward propagating {A}gulhas rings. {N}o large amount of {S}ubantarctic {M}ode {W}ater ({SAMW}) is observed, but two varieties of vertically homogeneous water are found in eddies detached from the {A}gulhas retroflection: one is remotely ({I}ndian {O}cean) formed {SAMW}, and the other a local variety formed through winter convection in some eddies. {T}he deep front imprints allow one to recognize lower circumpolar deep water ({LCDW}) from the {D}rake {P}assage (south of the {SACCF}), a mix of {LCDW} and {N}orth {A}tlantic {D}eep {W}ater ({NADW}) injected in the {ACC} in the {A}rgentine {B}asin (between the {PF} and {STF}), and diluted {NADW} from a southeastward pathway along the {A}frican continental slope (north of the {STF} in these data). {T}he abyssal circulation, much controlled by ridges transverse to the {ACC}, shows a westward entry of diluted {WSDW} into the {C}ape {B}asin below the {PF} and two cyclonic patterns in the southern and central {C}ape {B}asin superimposed on a wider eastward trend. {T}ransport estimates are given for the {ACC}, its fronts, and the abyssal circulation. {T}he baroclinic and total {ACC} transports are similar to 136 and similar to 153 {S}v, respectively. {B}ottom-intensified westward flows 0(20 {S}v) have only a limited effect on the {ACC} net transport, being laterally compensated. {T}hey, however, affect the frontal structure: the similar to 15 {S}v entry of diluted {WSDW} seems related to a branching of the {PF}, and its eastward recirculation widens the full-depth transport signature of the {SAF}.},
  keywords = {{A}ntarctic circumpolar current ; {A}gulhas eddies ; {T}ransport ; {B}ottom circulation ; {F}ronts ; {W}ater masses},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I} - {O}ceanographic {R}esearch {P}apers},
  volume = {55},
  numero = {10},
  pages = {1284--1303},
  ISSN = {0967-0637},
  year = {2008},
  DOI = {10.1016/j.dsr.2008.05.009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010044057},
}