FN Archimer Export Format
PT J
TI Temporal variability of the meridional overturning circulation at 34.5°S: Results from two pilot boundary arrays in the South Atlantic
BT 
AF MEINEN, Christopher S.
   SPEICH, Sabrina
   PEREZ, Renellys C.
   DONG, Shenfu
   PIOLA, Alberto R.
   GARZOLI, Silvia L.
   GLADYSHEV, Sergey
   BARINGER, Molly
   CAMPOS, Edmo J. D.
AS 1:1;2:2,3;3:1,4;4:1,4;5:5,6;6:1,4;7:7;8:1;9:8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 NOAA, Atlantic Oceanog & Meteorol Lab, Phys Oceanog Div, Miami, FL 33149 USA.
   Univ Brest, Lab Phys Oceans, Brest, France.
   IFREMER, Brest, France.
   Univ Miami, Cooperat Inst Marine & Atmospher Studies, Miami, FL USA.
   Serv Hidrog Naval, Buenos Aires, DF, Argentina.
   Univ Buenos Aires, UMI, IFAECI, CONICET,CNRS, Buenos Aires, DF, Argentina.
   PP Shirshov Oceanol Inst, Moscow, Russia.
   Univ Sao Paulo, Oceanog Inst, Sao Paulo, Brazil.
C2 NOAA, USA
   UBO, FRANCE
   IFREMER, Brest, France.
   UNIV MIAMI, USA
   SERV HIDROG NAVAL, ARGENTINA
   UNIV BUENOS AIRES, ARGENTINA
   PP SHIRSHOV OCEANOL INST, RUSSIA
   UNIV SAO PAULO, BRAZIL
TC 44
UR https://archimer.ifremer.fr/doc/00167/27789/25982.pdf
LA English
DT Article
CR MD 166 / BONUS-GOODHOPE
BO Marion Dufresne
DE ;meridional overturning circulation;transport;South Atlantic;inverted echo sounder;bottom pressure
AB Data from two boundary arrays deployed along 34.5°S are combined to produce the first continuous in situ time series observations of the basin-wide meridional overturning circulation (MOC) in the South Atlantic. Daily estimates of the MOC between March 2009 and December 2010 range between 3 Sv and 39 Sv (1 Sv = 106 m3 s−1) after a 10 day low-pass filter is applied. Much of the variability in this ∼20 month record occurs at periods shorter than 100 days. Approximately two-thirds of the MOC variability is due to changes in the geostrophic (baroclinic plus barotropic) volume transport, with the remainder associated with the direct wind-forced Ekman transport. When low-pass filtered to match previously published analyses in the North Atlantic, the observed temporal standard deviation at 34.5°S matches or somewhat exceeds that observed by time series observations at 16°N, 26.5°N, and 41°N. For periods shorter than 20 days the basin-wide MOC variations are most strongly influenced by Ekman flows, while at periods between 20 and 90 days the geostrophic flows tend to exert slightly more control over the total transport variability of the MOC. The geostrophic shear variations are roughly equally controlled by density variations on the western and eastern boundaries at all time scales captured in the record. The observed time-mean MOC vertical structure and temporal variability agree well with the limited independent observations available for confirmation.
PY 2013
PD DEC
SO Journal Of Geophysical Research-oceans
SN 0148-0027
PU Amer Geophysical Union
VL 118
IS 12
UT 000329926200010
BP 6461
EP 6478
DI 10.1002/2013JC009228
ID 27789
ER

EF