FN Archimer Export Format
PT J
TI Fingerprint of Climate Change on Southern Ocean Carbon Storage
BT 
AF Wright, R. M.
   Le Quéré, C.
   Mayot, N.
   Olsen, A.
   Bakker, D. C. E.
AS 1:1;2:1;3:1;4:2,3;5:1;
FF 1:;2:;3:;4:;5:;
C1 Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences University of East Anglia Norwich ,UK
   Geophysical Institute University of Bergen Bergen, Norway
   Bjerknes Centre for Climate Research Bergen ,Norway
C2 UNIV E ANGLIA, UK
   UNIV BERGEN, NORWAY
   BCCR, NORWAY
IF 5.2
TC 0
UR https://archimer.ifremer.fr/doc/00842/95441/103241.pdf
LA English
DT Article
CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
DE ;dissolved inorganic carbon;Southern Ocean;climate variability;carbon storage
AB The Southern Ocean plays a critical role in the uptake, transport, and storage of carbon by the global oceans. It is the ocean's largest sink of CO2, yet it is also among the regions with the lowest storage of anthropogenic carbon. This behavior results from a unique combination of high winds driving the upwelling of deep waters and the subduction and northward transport of surface carbon. Here we isolate the direct effect of increasing anthropogenic CO2 in the atmosphere from the indirect effect of climate variability and climate change on the reorganization of carbon in the Southern Ocean interior using a combination of modeling and observations. We show that the effect of climate variability and climate change on the storage of carbon in the Southern Ocean is nearly as large as the effect of anthropogenic CO2 during the period 1998–2018 compared with the climatology around the year 1995. We identify a distinct climate fingerprint in dissolved inorganic carbon (DIC), with elevated DIC concentration in the ocean at 300–600 m that reinforces the anthropogenic CO2 signal, and reduced DIC concentration in the ocean around 2,000 m that offsets the anthropogenic CO2 signal. The fingerprint is strongest at lower latitudes (30°–55°S). This fingerprint could serve to monitor the highly uncertain evolution of carbon within this critical ocean basin, and better identify its drivers. Key Points The effect of decadal climate variability on dissolved inorganic carbon (DIC) in the Southern Ocean is nearly as large as that of atmospheric CO2 Climatic drivers cause a distinct fingerprint on the change in DIC concentration in the Southern Ocean interior This fingerprint could serve to detect future trends in Southern Ocean carbon storage 
PY 2023
PD APR
SO Global Biogeochemical Cycles
SN 0886-6236
PU American Geophysical Union (AGU)
VL 37
IS 4
UT 001000097500001
DI 10.1029/2022GB007596
ID 95441
ER

EF