scholarly journals Comparison of Subantarctic Mode Water and Antarctic Intermediate Water formation rates in the South Pacific between NCAR-CCSM4 and observations

2014 ◽  
Vol 41 (2) ◽  
pp. 519-526 ◽  
Author(s):  
Corinne A. Hartin ◽  
Rana A. Fine ◽  
Igor Kamenkovich ◽  
Bernadette M. Sloyan
Keyword(s):  
South Pacific ◽  
Intermediate Water ◽  
The South ◽  
Mode Water ◽  
Antarctic Intermediate Water ◽  
Subantarctic Mode Water ◽  
Water Formation

Formation rates of Subantarctic mode water and Antarctic intermediate water within the South Pacific

2011 ◽  
Vol 58 (5) ◽  
pp. 524-534 ◽  
Author(s):  
Corinne A. Hartin ◽  
Rana A. Fine ◽  
Bernadette M. Sloyan ◽  
Lynne D. Talley ◽  
Teresa K. Chereskin ◽  
...  
Keyword(s):  
South Pacific ◽  
Intermediate Water ◽  
The South ◽  
Mode Water ◽  
Antarctic Intermediate Water ◽  
Subantarctic Mode Water

scholarly journals Variability of Antarctic intermediate water properties in the South Pacific Ocean

2006 ◽  
Vol 3 (6) ◽  
pp. 2021-2058 ◽  
Author(s):  
M. Tomczak
Keyword(s):  
Time Series Data ◽  
World Ocean ◽  
South Pacific ◽  
Series Data ◽  
Intermediate Water ◽  
The South ◽  
Salinity Field ◽  
Antarctic Intermediate Water ◽  
Argo Float ◽  
South Pacific Ocean

Abstract. Argo float time series data are used to study the salinity field at the depth of the salinity minimum produced by Antarctic Intermediate Water (AAIW). It is found that far from showing the smooth erosion of the minimum that would result from diffusive flow, the salinity field is characterized by features of geostrophic turbulence such as fronts, eddies and intrusions. Comparison of the Argo float observations with the climatology of the World Ocean Atlas (WOA) reveals significant differences between the two data sets. Some of the differences may have their origin in problems with the WOA data density in remote regions of the South Pacific, but most are more likely produced by interannual variations of the AAIW salinity field.

Antarctic Intermediate Water and Subantarctic Mode Water Formation in the Southeast Pacific: The Role of Turbulent Mixing

2010 ◽  
Vol 40 (7) ◽  
pp. 1558-1574 ◽  
Author(s):  
Bernadette M. Sloyan ◽  
Lynne D. Talley ◽  
Teresa K. Chereskin ◽  
Rana Fine ◽  
James Holte
Keyword(s):  
Mixed Layer ◽  
Austral Summer ◽  
Buoyancy Flux ◽  
Intermediate Water ◽  
Austral Winter ◽  
Mode Water ◽  
Subantarctic Mode Water ◽  
Southeast Pacific ◽  
Water Formation ◽  
Summer Survey

Abstract During the 2005 austral winter (late August–early October) and 2006 austral summer (February–mid-March) two intensive hydrographic surveys of the southeast Pacific sector of the Southern Ocean were completed. In this study the turbulent kinetic energy dissipation rate ε, diapycnal diffusivity κ, and buoyancy flux Jb are estimated from the CTD/O2 and XCTD profiles for each survey. Enhanced κ of O(10−3 to 10−4 m2 s−1) is found near the Subantarctic Front (SAF) during both surveys. During the winter survey, enhanced κ was also observed north of the “subduction front,” the northern boundary of the winter deep mixed layer north of the SAF. In contrast, the summer survey found enhanced κ across the entire region north of the SAF below the shallow seasonal mixed layer. The enhanced κ below the mixed layer decays rapidly with depth. A number of ocean processes are considered that may provide the energy flux necessary to support the observed diffusivity. The observed buoyancy flux (4.0 × 10−8 m2 s−3) surrounding the SAF during the summer survey is comparable to the mean buoyancy flux (0.57 × 10−8 m2 s−3) associated with the change in the interior stratification between austral summer and autumn, determined from Argo profiles. The authors suggest that reduced ocean stratification during austral summer and autumn, by interior mixing, preconditions the water column for the rapid development of deep mixed layers and efficient Antarctic Intermediate Water and Subantarctic Mode Water formation during austral winter and early spring.

scholarly journals Variability of Antarctic intermediate Water properties in the South Pacific Ocean

Ocean Science ◽  
2007 ◽  
Vol 3 (3) ◽  
pp. 363-377 ◽  
Author(s):  
M. Tomczak
Keyword(s):  
Time Series Data ◽  
World Ocean ◽  
South Pacific ◽  
Series Data ◽  
Intermediate Water ◽  
The South ◽  
Salinity Field ◽  
Antarctic Intermediate Water ◽  
Argo Float ◽  
South Pacific Ocean

Abstract. Argo float time series data are used to study the salinity field at the depth of the salinity minimum produced by Antarctic Intermediate Water (AAIW). It is found that far from showing the smooth erosion of the minimum that would result from diffusive flow, the salinity field is characterized by features of geostrophic turbulence such as fronts, eddies and intrusions. Comparison of the Argo float observations with the climatology of the World Ocean Atlas (WOA) reveals significant differences between the two data sets. Some of the differences may have their origin in problems with the WOA data density in remote regions of the South Pacific, but most are more likely produced by interannual variations of the AAIW salinity field.

scholarly journals An Exchange Window for the Injection of Antarctic Intermediate Water into the South Pacific

2007 ◽  
Vol 37 (1) ◽  
pp. 31-49 ◽  
Author(s):  
Daniele Iudicone ◽  
Keith B. Rodgers ◽  
Richard Schopp ◽  
Gurvan Madec
Keyword(s):  
Southern Ocean ◽  
Large Scale ◽  
South Pacific ◽  
Intermediate Water ◽  
The South ◽  
Antarctic Intermediate Water ◽  
South Pacific Ocean ◽  
The Pacific ◽  
Basin Scale ◽  
Circumpolar Current

Abstract Antarctic Intermediate Water (AAIW) occupies the intermediate horizon of most of the world oceans. Formed in the Southern Ocean, it is characterized by a relative salinity minimum. With a new, denser in situ National Oceanographic Data Center dataset, the authors have reanalyzed the export characteristics of AAIW from the Southern Ocean into the South Pacific Ocean. These new data show that part of the AAIW is exported from the subpolar frontal region by the large-scale circulation through an exchange window of 10° width situated east of 90°W in the southeast corner of the Pacific basin. This suggests the origin of this water to be in the Antarctic Circumpolar Current. A set of numerical modeling experiments has been used to reproduce these observed features and to demonstrate that the dynamics of the exchange window is controlled by the basin-scale meridional pressure gradient. The exchange of AAIW between the Southern and Pacific Oceans must therefore be understood in the context of the large basin-scale dynamical balance rather than simply local effects.

Sign in / Sign up

Export Citation Format

Share Document