FN Archimer Export Format
PT J
TI Evolution of the Oceanic C-13 Suess Effect in the Southeastern Indian Ocean Between 1994 and 2018
BT 
AF WILLIAMS, Thomas J.
   WAGNER, Amy J.
   SIKES, Elisabeth L.
   MARTIN, Ellen E.
AS 1:1;2:2;3:3;4:1;
FF 1:;2:;3:;4:;
C1 Univ Florida, Dept Geol Sci, Gainesville, FL 32611,USA.
   Calif State Univ Sacramento, Dept Geog, Sacramento, CA 95819 ,USA.
   Rutgers State Univ, Dept Marine & Coastal Sci, New Brunswick, NJ, USA.
C2 UNIV FLORIDA, USA
   UNIV CALIF STATE, USA
   UNIV RUTGERS STATE, USA
TC 1
UR https://archimer.ifremer.fr/doc/00700/81202/85443.pdf
   https://archimer.ifremer.fr/doc/00700/81202/85444.pdf
LA English
DT Article
CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
DE ;carbon cycle;chemical oceanography;Indian Ocean;Southern Ocean;stable carbon isotopes;Suess effect
AB The decrease in delta C-13 of dissolved inorganic carbon (delta C-13(DIC)) owing to uptake of anthropogenic CO2 (the oceanic C-13 Suess effect) in the Southeastern Indian Ocean over the last decade was calculated using an extended multiparameter linear regression technique. Samples collected on the CROCCA-2S (Coring to Reconstruct Ocean Circulation and Carbon Dioxide Across 2 Seas) cruise in November-December 2018 were compared to samples from the CLIVAR (Climate and Ocean: Variability, Predictability, and Change) and OISO (Ocean Indien Service d'Observation) programs from 2007 to 2009. Surface ocean delta C-13(DIC) decreased by an average of -0.53 +/- 0.04 parts per thousand across this period, at an average rate of -0.053 +/- 0.004 parts per thousand per year. This rate of delta C-13(DIC) change is an increase from -0.021 +/- 0.024 parts per thousand per year between 1994 and 2008. We find that the interior water mass most impacted by the oceanic C-13 Suess effect between 2008 and 2018 was Subantarctic Mode Water (SAMW), within which delta C-13(DIC) decreased by -0.044 +/- 0.002 parts per thousand per year. Using previously published relationships between the oceanic C-13 Suess effect and anthropogenic carbon, we estimate the annual storage of anthropogenic carbon within SAMW in the southeastern Indian Ocean has increased from similar to 2.0 +/- 0.2 mu mol/kg per year between 1994 and 2008 to 5.5 +/- 0.6 mu mol/kg per year between 2008 and 2018. 
PY 2021
PD APR
SO Geochemistry Geophysics Geosystems
PU Amer Geophysical Union
VL 22
IS 4
UT 000643942600022
DI 10.1029/2020GC009402
ID 81202
ER

EF