@article{fdi:010055775,
  title = {{T}he origin and fate of mode water in the southern {P}acific {O}cean},
  author = {{H}asson, {A}. and {K}och {L}arrouy, {A}riane and {M}orrow, {R}. and {J}uza, {M}. and {P}enduff, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding the origin and fate of mode and intermediate waters ({MW}) in the subtropical {P}acific {O}cean is critical for climate, as {MW} store and export a large volume of {CO}2, heat, nutrients and salinity to lower latitudes at depths isolated from the atmosphere. {A} realistic 4{D} simulation has been used to track and quantify the {MW} routes and their property characteristics at the last region of subduction. {I}t also allows us to quantify the water transformation after subduction. {T}he simulation has been compared to available observations using a collocation method that interpolated model data onto observations in time and space. {T}he comprehensive comparisons gave us confidence in the model's capacity to reproduce {MW} characteristics. {A} quantitative {L}agrangian analysis was performed on the model output to depict the origin, the fate and the route of {MW} circulating in the southern {P}acific {O}cean, selected in the density range of 26.8-27.4 kg m(-3). {W}e found 18 {S}v of {MW} were transported northward in patches through the 42 degrees {S} section, mostly between 200 and 800 m depth. {O}f this transport, 8 {S}v enters the {P}acific {O}cean in the upper layer south of {T}asmania and subducts in the {P}acific. {T}he remainder is not ventilated in the {P}acific sector: 4 {S}v is advected from the {I}ndian {O}cean south of {T}asmania at intermediate depth and finally 6 {S}v is part of an intermediate depth recirculation within the {P}acific {O}cean. {P}articles take up to 30 years to travel northward through our domain before crossing the 42 degrees {S} section. {S}outhward transport branches also exist: 3 {S}v flows southward following the eastern {N}ew {Z}ealand coast and then exits through {D}rake {P}assage. {A}n additional 4 {S}v passes southward in the {T}asman {S}ea, following the eastern {T}asmanian coast and enters the {I}ndian {O}cean south of {T}asmania, as part of the {T}asman {L}eakage. {F}our different formation sites have been identified, where the {MW} are last ventilated. {T}hese formation sites have different water masses with specific salinity ranges. {A} study on the evolution of the physical characteristics of each of these water masses has been performed. {A}ll {MW} characteristics become more homogeneous at 42 degrees {S} than they were when they left the mixed layer. {T}his study confirms the homogenisation of mode waters at intermediate depth in the {P}acific {O}cean as previously revealed in the {I}ndian {O}cean using the same methodology. {T}ransformations are shown to be mostly isopycnal in the {T}asman {S}ea and diapycnal farther east.},
  keywords = {{S}ubantarctic mode water ; {A}ntarctic intermediate water ; {S}outhern {O}cean ; {S}outh {P}acific {O}cean ; {W}ater mass transformations ; {W}ater mass pathways ; {L}agrangian},
  booktitle = {},
  journal = {{O}cean {D}ynamics},
  volume = {62},
  numero = {3},
  pages = {335--354},
  ISSN = {1616-7341},
  year = {2012},
  DOI = {10.1007/s10236-011-0507-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010055775},
}