FN Archimer Export Format
PT J
TI A hydrographic section from South Africa to the southern limit of the Antarctic Circumpolar Current at the Greenwich meridian
BT 
AF GLADYSHEV, S
   ARHAN, Michel
   SOKOV, A
   SPEICH, Sabrina
AS 1:1;2:3;3:1;4:2;
FF 1:;2:PDG-DOP-DCB-OPS-LPO;3:;4:;
C1 PP Shirshov Oceanol Inst, Moscow, Russia.
   CNRS, IFREMER, IRD, Lab Phys Oceans,UBO, Brest, France.
C2 PP SHIRSHOV OCEANOL INST, RUSSIA
   UBO, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-OPS-LPO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 1.791
TC 50
UR https://archimer.ifremer.fr/doc/2008/publication-6097.pdf
LA English
DT Article
CR MD 166 / BONUS-GOODHOPE
BO Marion Dufresne
DE ;Water masses;Fronts;Bottom circulation;Transport;Agulhas eddies;Antarctic Circumpolar Current
AB The properties and circulation of water masses leaving and entering the Atlantic Ocean south of Africa are examined using data from a hydrographic and Lowered acoustic Doppler current profiler section from South Africa to the southern limit of the Antarctic Circumpolar Current (ACC). At the upper levels, the ACC fronts are well determined using either classical water mass definitions or gradient-based criteria. While the locations of the Subantarctic Front (SAF), Polar Front (PF), and Southern ACC Front (SACCF) seem controlled by the neighbouring ridges, that of the Subtropical Front (STF) is much influenced in this region (similar to 10 degrees E) by northwestward propagating Agulhas rings. No large amount of Subantarctic Mode Water (SAMW) is observed, but two varieties of vertically homogeneous water are found in eddies detached from the Agulhas retroflection: one is remotely (Indian Ocean) formed SAMW, and the other a local variety formed through winter convection in some eddies. The deep front imprints allow one to recognize lower circumpolar deep water (LCDW) from the Drake Passage (south of the SACCF), a mix of LCDW and North Atlantic Deep Water (NADW) injected in the ACC in the Argentine Basin (between the PF and STF), and diluted NADW from a southeastward pathway along the African continental slope (north of the STF in these data). The abyssal circulation, much controlled by ridges transverse to the ACC, shows a westward entry of diluted WSDW into the Cape Basin below the PF and two cyclonic patterns in the southern and central Cape Basin superimposed on a wider eastward trend. Transport estimates are given for the ACC, its fronts, and the abyssal circulation. The baroclinic and total ACC transports are similar to 136 and similar to 153 Sv, respectively. Bottom-intensified westward flows 0(20 Sv) have only a limited effect on the ACC net transport, being laterally compensated. They, however, affect the frontal structure: the similar to 15 Sv 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.
PY 2008
PD OCT
SO Deep Sea Research Part I: Oceanographic Research Papers
SN 0967-0637
PU Elsevier
VL 55
IS 10
UT 000259888800006
BP 1284
EP 1303
DI 10.1016/j.dsr.2008.05.009
ID 6097
ER

EF