Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean

  title={Meridional overturning circulation conveys fast acidification to the deep Atlantic Ocean},
  author={Fiz F. P{\'e}rez and Marcos Fontela and M. I. Garc{\'i}a‐Ib{\'a}{\~n}ez and Herl{\'e} Mercier and Anton Velo and Pascale Lherminier and Patricia Zunino and Mercedes de la Paz and Fernando Alonso-P{\'e}rez and Elisa F. Guallart and Xos{\'e} A. Padin},
Since the Industrial Revolution, the North Atlantic Ocean has been accumulating anthropogenic carbon dioxide (CO2) and experiencing ocean acidification, 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… Expand
Cold-water corals in the Subpolar North Atlantic Ocean exposed to aragonite undersaturation if the 2 °C global warming target is not met
Abstract The net uptake of carbon dioxide (CO2) from the atmosphere is changing the ocean's chemical state. Such changes, commonly known as ocean acidification, include a reduction in pH and theExpand
The Northeast Atlantic is running out of excess carbonate in the horizon of cold-water corals communities
A progression to undersaturation with respect to aragonite is shown that could compromise the conservation of the habitats and ecosystem services developed by benthic marine calcifiers inhabiting that depth-range, such as the cold-water corals (CWC) communities. Expand
Contrasting drivers and trends of ocean acidification in the subarctic Atlantic
The driver analysis detects that warming contributes up to 50% to the increase in [H+]T at the IRM-TS but has a small positive effect on calcium carbonate saturation, which is partially dampened by the northward advection of water with a relatively low natural CO2 content. Expand
Nordic Seas Acidification
Abstract. Being windows to the deep ocean, the Nordic Seas play an important role in transferring anthropogenic carbon, and thus ocean acidification, to the abyss. Due to its location in highExpand
Current CaCO3 dissolution at the seafloor caused by anthropogenic CO2
It is determined that significant anthropogenic dissolution now occurs in the western North Atlantic, amounting to 40–100% of the total seafloor dissolution at its most intense locations, and indicates that a by-product of human activities is currently altering the geological record of the deep sea. Expand
Controls on surface water carbonate chemistry along North American ocean margins
It is shown that along the North American Atlantic and Gulf coasts the meridional distributions of dissolved inorganic carbon and carbonate mineral saturation state are controlled by partial equilibrium with the atmosphere resulting in relatively low DIC and high Ω in warm southern waters and the opposite in cold northern waters. Expand
Anthropogenic CO2 and ocean acidification in Argentine Basin Water Masses over almost five decades of observations.
If CO2 emissions follows the path of business-as-usual emissions, SACW would become undersaturated with respect to aragonite at the end of the century and the undersaturation in AAIW is virtually unavoidable. Expand
Decadal acidification in Atlantic and Mediterranean water masses exchanging at the Strait of Gibraltar
The analysis of biogeochemical measurements collected at the Strait of Gibraltar revealed a significant human impact on all water masses in terms of accumulation of anthropogenic CO2, and the decadal pH decline found in the WMDW and the NACW was markedly affected by natural processes, which accounted for by nearly 60% and 40% of the total pH decrease, respectively. Expand
The Atlantic Meridional Overturning Circulation in High‐Resolution Models
The Atlantic meridional overturning circulation (AMOC) represents the zonally integrated stream function of meridional volume transport in the Atlantic Basin. The AMOC plays an important role inExpand
Long-term integrated biogeochemical budget driven by circulation in the eastern subpolar North Atlantic
Abstract The eastern subpolar North Atlantic (eSPNA) is a key region in the Atlantic Meridional Overturning Circulation (AMOC), playing an important role in biogeochemical cycles and climateExpand


Atlantic Ocean CO2 uptake reduced by weakening of the meridional overturning circulation
Uptake of atmospheric carbon dioxide in the subpolar North Atlantic Ocean declined rapidly between 1990 and 2006. This reduction in carbon dioxide uptake was related to warming at the sea surface,Expand
Physically driven patchy O2 changes in the North Atlantic Ocean simulated by the CMIP5 Earth system models
The subpolar North Atlantic is a key region for the oceanic uptake of heat, oxygen and carbon dioxide. Centennial oxygen (O2) changes are investigated in the upper 700 m of the North Atlantic OceanExpand
Dissolved Organic Carbon in the North Atlantic Meridional Overturning Circulation
The quantitative role of the Atlantic Meridional Overturning Circulation (AMOC) in dissolved organic carbon (DOC) export is evaluated by combining DOC measurements with observed water massExpand
Climatological distribution of aragonite saturation state in the global oceans
Aragonite saturation state (Ωarag) in surface and subsurface waters of the global oceans was calculated from up-to-date (through the year of 2012) ocean station dissolved inorganic carbon (DIC) andExpand
Variability of the meridional overturning circulation at the Greenland-Portugal OVIDE section from 1993 to 2010
The meridional overturning circulation (MOC) in the North Atlantic transports heat from the subtropics to high latitudes and hence plays an important role in the Earth’s climate. A region crucial forExpand
Projected pH reductions by 2100 might put deep North Atlantic biodiversity at risk
This study aims to evaluate the potential for impacts of ocean acidification on North Atlantic deep-sea ecosystems in response to IPCC AR5 Representative Con- centration Pathways (RCPs). Deep-seaExpand
Further Intensification of Deep Convection in the Labrador Sea in 2016
There has been a progressive deepening of winter convection in the Labrador Sea since 2012, with the individual profile maximum depth exceeding 1800 m since 2014 and reaching 2100 m in 2016. ThisExpand
Seamounts as refugia from ocean acidification for cold-water stony corals
Cold-water stony corals create habitat for a diverse range of deep-water species but are thought to be threatened by ocean acidification due to oceanic uptake of anthropogenic CO2. Knowledge of theExpand
Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans
The in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data are estimated, and the future impacts of anthropogenic CO2 on Ca CO3 shell–forming species are discussed. Expand
Temporal variability of the anthropogenic CO 2 storage in the Irminger Sea
Abstract. The anthropogenic CO2 (Cant) estimates from cruises spanning more than two decades (1981–2006) in the Irminger Sea area of the North Atlantic Subpolar Gyre reveal a large variability in theExpand