FN Archimer Export Format
PT J
TI Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean
BT 
AF PEREZ, Fiz F
   FONTELA, Marcos
   GARCIA-IBANEZ, Maria Isabel
   MERCIER, Herle
   VELO, Anton
   LHERMINIER, Pascale
   ZUNINO, Patricia
   DE LA PAZ, Mercedes
   ALONSO-PEREZ, Fernando
   GUALLART, Elisa E.
   PADIN, Xose A.
AS 1:1;2:1;3:1;4:2;5:1;6:3;7:2;8:1;9:1;10:1;11:1;
FF 1:;2:;3:;4:;5:;6:PDG-ODE-LOPS-OH;7:;8:;9:;10:;11:;
C1 CSIC, IIM, Calle Eduardo Cabello 6, Vigo 36208, Spain.
   Univ Brest, CNRS,Ifremer, Inst Rech Dev, LOPS,Ctr Ifremer Bretagne, F-29280 Plouzane, France.
C2 CSIC, SPAIN
   CNRS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
IF 43.07
TC 57
UR https://archimer.ifremer.fr/doc/00426/53783/55106.pdf
LA English
DT Article
CR GEOVIDE
   OVIDE
BO Pourquoi pas ?
AB Since the Industrial Revolution, the North Atlantic Ocean has been accumulating anthropogenic carbon dioxide (CO2) and experiencing ocean acidification1, that is, an increase in the concentration of hydrogen ions (a reduction in pH) and a reduction in the concentration of carbonate ions. The latter causes the ‘aragonite saturation horizon’—below which waters are undersaturated with respect to a particular calcium carbonate, aragonite—to move to shallower depths (to shoal), exposing corals to corrosive waters2,3. Here we use a database analysis to show that the present rate of supply of acidified waters to the deep Atlantic could cause the aragonite saturation horizon to shoal by 1,000–1,700 metres in the subpolar North Atlantic within the next three decades. We find that, during 1991–2016, a decrease in the concentration of carbonate ions in the Irminger Sea caused the aragonite saturation horizon to shoal by about 10–15 metres per year, and the volume of aragonite-saturated waters to reduce concomitantly. Our determination of the transport of the excess of carbonate over aragonite saturation (xc[CO32−])—an indicator of the availability of aragonite to organisms—by the Atlantic meridional overturning circulation shows that the present-day transport of carbonate ions towards the deep ocean is about 44 per cent lower than it was in preindustrial times. We infer that a doubling of atmospheric anthropogenic CO2 levels—which could occur within three decades according to a ‘business-as-usual scenario’ for climate change4—could reduce the transport of xc[CO32−] by 64–79 per cent of that in preindustrial times, which could severely endanger cold-water coral habitats. The Atlantic meridional overturning circulation would also export this acidified deep water southwards, spreading corrosive waters to the world ocean. 
PY 2018
PD FEB
SO Nature
SN 0028-0836
PU Nature Publishing Group
VL 554
IS 7693
UT 000425597400044
BP 515
EP 518
DI 10.1038/nature25493
ID 53783
ER

EF