V. Gouretski
82
Fig. 3. Accumulated eastward and westward transports (Sv) in the South Pacific based on
gridded density data
Subantarctic Front (SAF), passes through the Eltanin Fracture Zone at 130°W. We
estimate the geostrophic volume transport of the ACC as the average of 110 Sv
between 185 and 180°W south of New Zealand, where the subtropical gyre is not
crossed by the méridional section.
I
4 Water Masses
To distinguish between the water masses in the study area it is convenient to
divide the area into two domains: a shelf-slope domain and a deep-ocean domain.
The temperature-parameter scatter diagrams for both domains are shown in Figs.
4-5. (We subjectively define here the shelf-slope and deep-ocean domains as those
with bottom depths less than 2000 m and greater than 2000 m respectively.)
4.1 Water Masses of the Shelf/Slope Domain
I he Following water masses are identified within the shelf-slope domain (Fig. 4):
Antarctic Surface Water (AASW), High Salinity Shelf Water (HSSW), Low Salinity
Shelf Water (LSSW), Ice Shelf Water (ISW) and Modified Circumpolar Deep Water
(MCDW.) I he Antarctic Surface Water occupies a layer of about 50 m thick, found
throughout the whole shelf area in summer. The layer has températures up to sev-
82
Fig. 3. Accumulated eastward and westward transports (Sv) in the South Pacific based on
gridded density data
Subantarctic Front (SAF), passes through the Eltanin Fracture Zone at 130°W. We
estimate the geostrophic volume transport of the ACC as the average of 110 Sv
between 185 and 180°W south of New Zealand, where the subtropical gyre is not
crossed by the méridional section.
I
4 Water Masses
To distinguish between the water masses in the study area it is convenient to
divide the area into two domains: a shelf-slope domain and a deep-ocean domain.
The temperature-parameter scatter diagrams for both domains are shown in Figs.
4-5. (We subjectively define here the shelf-slope and deep-ocean domains as those
with bottom depths less than 2000 m and greater than 2000 m respectively.)
4.1 Water Masses of the Shelf/Slope Domain
I he Following water masses are identified within the shelf-slope domain (Fig. 4):
Antarctic Surface Water (AASW), High Salinity Shelf Water (HSSW), Low Salinity
Shelf Water (LSSW), Ice Shelf Water (ISW) and Modified Circumpolar Deep Water
(MCDW.) I he Antarctic Surface Water occupies a layer of about 50 m thick, found
throughout the whole shelf area in summer. The layer has températures up to sev-