FN Archimer Export Format
PT J
TI Space and time variability of the Southern Ocean carbon budget
BT 
AF ROSSO, Isabella
   MAZLOFF, Matthew R.
   VERDY, Ariane
   TALLEY, Lynne D.
AS 1:1;2:1;3:1;4:1;
FF 1:;2:;3:;4:;
C1 Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
C2 UNIV CALIF SAN DIEGO, USA
IF 2.711
TC 20
UR https://archimer.ifremer.fr/doc/00662/77395/78996.pdf
   https://archimer.ifremer.fr/doc/00662/77395/78997.pdf
   https://archimer.ifremer.fr/doc/00662/77395/78998.pdf
LA English
DT Article
CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
DE ;carbon budget;Southern Ocean;state estimate
AB The upper ocean dissolved inorganic carbon (DIC) concentration is regulated by advective and diffusive transport divergence, biological processes, freshwater, and air-sea CO2 fluxes. The relative importance of these mechanisms in the Southern Ocean is uncertain, as year-round observations in this area have been limited. We use a novel physical-biogeochemical state estimate of the Southern Ocean to construct a closed DIC budget of the top 650 m and investigate the spatial and temporal variability of the different components of the carbon system. The dominant mechanisms of variability in upper ocean DIC depend on location and time and space scales considered. Advective transport is the most influential mechanism and governs the local DIC budget across the 10 day-5 year timescales analyzed. Diffusive effects are nearly negligible. The large-scale transport structure is primarily set by upwelling and downwelling, though both the lateral ageostrophic and geostrophic transports are significant. In the Antarctic Circumpolar Current, the carbon budget components are also influenced by the presence of topography and biological hot spots. In the subtropics, evaporation and air-sea CO2 flux primarily balances the sink due to biological production and advective transport. Finally, in the subpolar region sea ice processes, which change the seawater volume and thus the DIC concentration, compensate the large impact of the advective transport and modulate the timing of biological activity and air-sea CO2 flux. 
PY 2017
PD SEP
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 122
IS 9
UT 000413167200025
BP 7407
EP 7432
DI 10.1002/2016JC012646
ID 77395
ER

EF