FN Archimer Export Format
PT J
TI Subantarctic Mode Water variability influenced by mesoscale eddies south of Tasmania
BT 
AF HERRAIZ-BORREGUERO, Laura
   RINTOUL, Stephen R.
AS 1:1,2,3;2:1,4,5;
FF 1:;2:;
C1 Centre for Australian Weather and Climate Research, Hobart, Tasmania, Australia
   Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Hobart, Tasmania, Australia
   Center for Marine Science, University of Tasmania, Hobart, Tasmania, Australia
   Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania, Australia
   Wealth from Oceans National Research Flagship, Hobart, Tasmania, Australia
C2 CAWCR, AUSTRALIA
   UNIV TASMANIA, AUSTRALIA
   UNIV TASMANIA, AUSTRALIA
   UNIV TASMANIA, AUSTRALIA
   CSIRO, AUSTRALIA
IF 3.303
TC 27
UR https://archimer.ifremer.fr/doc/00253/36385/34926.pdf
LA English
DT Article
CR SURVOSTRAL 2000/2001
   SURVOSTRAL 2001/2002
   SURVOSTRAL 2002/2003
   SURVOSTRAL 2003/2004
   SURVOSTRAL 2004/2005
   SURVOSTRAL 2005/2006
   SURVOSTRAL 2006/2007
   SURVOSTRAL 2007/2008
   SURVOSTRAL 93
   SURVOSTRAL 94
   SURVOSTRAL 95
   SURVOSTRAL 96
   SURVOSTRAL 97
   SURVOSTRAL 98
   SURVOSTRAL 99
BO L'Astrolabe
DE ;Subantarctic Mode Water;Subantarctic Front;mesoscale features;water mass variability;Southern Ocean
AB Subantarctic Mode Water (SAMW) is formed by deep mixing on the equatorward side of the Antarctic Circumpolar Current. The subduction and export of SAMW from the Southern Ocean play an important role in global heat, freshwater, carbon, and nutrient budgets. However, the formation process and variability of SAMW remain poorly understood, largely because of a lack of observations. To determine the temporal variability of SAMW in the Australian sector of the Southern Ocean, we used a 15 year time series of repeat expendable bathythermograph sections from 1993 to 2007, seven repeat conductivity-temperature-depth sections from 1991 to 2001, and sea surface height maps. The mean temperature of the SAMW lies between 8.5 degrees C and 9.5 degrees C (mean of 8.8 degrees C, standard deviation of 0.3 degrees C), and there is no evidence of a trend over the 18 year record. However, the temperature, salinity, and pycnostad strength of the SAMW can change abruptly from section to section. In addition, the SAMW pool on a single section often consists of two or more modes with distinct temperature, salinity, and vertical homogeneity characteristics but similar density. We show that the multiple types of mode water can be explained by the advection of anomalous water from eddies and meanders of the fronts bounding the Subantarctic Zone and by recirculation of SAMW of different ages. Our results suggest that infrequently repeated sections can potentially produce misleading results because of aliasing of high interannual variability.
PY 2010
PD APR
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 115
IS C4/C04004
UT 000276316600001
BP 1
EP 12
DI 10.1029/2008JC005146
ID 36385
ER

EF