FN Archimer Export Format
PT J
TI Sudden emergence of a shallow aragonite saturation horizon in the Southern Ocean
BT 
AF NEGRETE-GARCIA, Gabriela
   LOVENDUSKI, Nicole S.
   HAURI, Claudine
   KRUMHARDT, Kristen M.
   LAUVSET, Siv K.
AS 1:1,2,8;2:1,2;3:3;4:2,4,9;5:5,6,7;
FF 1:;2:;3:;4:;5:;
C1 Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA.
   Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
   Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK USA.
   Univ Colorado, Environm Studies Program, Boulder, CO 80309 USA.
   NORCE Norwegian Res Ctr, Bjerknes Ctr Climate Res, Bergen, Norway.
   Univ Bergen, Geophys Inst, Bergen, Norway.
   Bjerknes Ctr Climate Res, Bergen, Norway.
   Scripps Inst Oceanog, Integrat Oceanog Div, La Jolla, CA USA.
   Natl Ctr Atmospher Res, Climate & Global Dynam Lab, POB 3000, Boulder, CO 80307 USA.
C2 UNIV COLORADO, USA
   UNIV COLORADO, USA
   UNIV ALASKA FAIRBANKS, USA
   UNIV COLORADO, USA
   NORCE NORWEGIAN RES CTR, NORWAY
   UNIV BERGEN, NORWAY
   BCCR, NORWAY
   UNIV CALIF SAN DIEGO, USA
   NCAR NATL CTR ATMOSPHER RES, USA
IF 20.893
TC 32
UR https://archimer.ifremer.fr/doc/00676/78807/81061.pdf
   https://archimer.ifremer.fr/doc/00676/78807/81062.pdf
   https://archimer.ifremer.fr/doc/00676/78807/81063.pdf
LA English
DT Article
CR OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
AB Models project that with current CO2 emission rates, the Southern Ocean surface will be undersaturated with respect to aragonite by the end of this century(1-4). This will result in widespread impacts on biogeochemistry and ocean ecosystems(5-7), particularly the health of aragonitic organisms, such as pteropods(7), which can dominate polar surface water communities(6). Here, we quantify the depth of the present-day Southern Ocean aragonite saturation horizon using hydrographic and ocean carbon chemistry observations, and use a large ensemble of simulations from the Community Earth System Model (CESM)(8,9) to track its evolution. A new, shallow aragonite saturation horizon emerges in many Southern Ocean locations between now and the end of the century. While all ensemble members capture the emergence, internal climate variability may affect the year of emergence; thus, its detection may have been overlooked by ensemble average analysis in the past. The emergence of the new horizon is driven by the slow accumulation of anthropogenic CO2 in the Southern Ocean thermocline, where the carbonate ion concentration exhibits a local minimum and approaches undersaturation. The new horizon is also apparent under an emission-stabilizing scenario indicating an inevitable, sudden decrease in the volume of suitable habitat for aragonitic organisms. 
PY 2019
PD APR
SO Nature Climate Change
SN 1758-678X
PU Nature Publishing Group
VL 9
IS 4
UT 000462353800017
BP 313
EP 317
DI 10.1038/s41558-019-0418-8
ID 78807
ER

EF