FN Archimer Export Format
PT J
TI Anthropogenic CO(2) in the Southern Ocean: Distribution and inventory at the Indian-Atlantic boundary (World Ocean Circulation Experiment line I6)
BT 
AF LO MONACO, C
   METZL, N
   POISSON, A
   BRUNET, C
   SCHAUER, B
AS 1:1;2:1;3:1;4:1;5:1;
FF 1:;2:;3:;4:;5:;
C1 Univ Paris 06, Lab Biogeochim & Chim Marines, IPSL, F-75252 Paris, France.
C2 UNIV PARIS 06, FRANCE
IF 2.784
TC 50
UR https://archimer.ifremer.fr/doc/00233/34409/32823.pdf
LA English
DT Article
CR CIVA 2 - MD 103
   OISO1
   OISO2
   OISO3-NIVMER98
BO Marion Dufresne
DE ;anthropogenic CO2;Southern Ocean;WOCE
AB The Southern Ocean, where various water masses are formed ( mode, intermediate, deep, and bottom waters), has a high potential to absorb anthropogenic CO(2) ( C ant). However, most data-based and model estimates indicate low C(ant) inventories south of 50 degrees S. In order to investigate this paradox, the distribution of C(ant) is estimated between South Africa and Antarctica ( World Ocean Circulation Experiment ( WOCE) line I6) based on a back-calculation technique previously used in the North Atlantic ( Kortzinger et al., 1998) and adapted here for application in the Southern Ocean. At midlatitudes (30 degrees-50 degrees S), formation and spreading of mode and intermediate waters results in a deep penetration of C(ant) ( down to 2000 m). South of 50 degrees S, significant concentrations of C ant were estimated in Circumpolar Deep Water (> 10 mu mol/ kg) and Antarctic Bottom Water ( AABW) ( 20-25 mu mol/ kg). Higher concentrations are detected along the continental slope in AABW presumably formed in Prydz Bay compared to AABW of Weddell Sea origin. The distribution of C(ant) obtained north of 50 degrees S compares well with previous databased and model estimates, but large disagreements are found in the south. However, although transient tracers are not used in the back-calculation technique employed here, the distribution of C(ant) is remarkably well correlated with CFCs. We reevaluated the column inventories of C ant for the Southern Ocean and found higher values at high latitudes ( 70-90 mol/m(2)) compared to the subtropical/subantarctic region (40-80 mol/m(2)). These results support the idea that deep and bottom water formation in the Southern Ocean is a key process in the natural sequestration of anthropogenic CO2.
PY 2005
PD JUL
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 110
IS C6/C06010
UT 000230170700002
BP 1
EP 18
DI 10.1029/2004JC002643
ID 34409
ER

EF