|
|
|
|
|
Gladyshev, S; Arhan, Michel; Sokov, A; Speich, Sabrina. |
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,... |
Tipo: Text |
Palavras-chave: Water masses; Fronts; Bottom circulation; Transport; Agulhas eddies; Antarctic Circumpolar Current. |
Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6097.pdf |
| |
|
|
Swart, S; Speich, Sabrina; Ansorge, I; Goni, G; Gladyshev, S; Lutjeharms, J. |
Data from five CTD and 18 XBT sections are used to estimate the baroclinic transport ( referenced to 2500 dbar) of the ACC south of Africa. Surface dynamic height is derived from XBT data by establishing an empirical relationship between vertically integrated temperature and surface dynamic height calculated from CTD data. This temperature-derived dynamic height data compare closely with dynamic heights calculated from CTD data ( average RMS difference = 0.05 dyn m). A second empirical relationship between surface dynamic height and cumulative baroclinic transport is defined, allowing us to study a more extensive time series of baroclinic transport derived from upper ocean temperature sections. From 18 XBT transects of the ACC, the average baroclinic... |
Tipo: Text |
Palavras-chave: Satellite altimetry; Antarctic Circumpolar Current; Baroclinic transport. |
Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4700.pdf |
| |
|
|
|