Subpolar North Atlantic western boundary density anomalies and the Meridional Overturning Circulation.

Autor: Li F; State Key Laboratory of Marine Environmental Science & College of Ocean and Earth Sciences, Xiamen University, Xiamen, China. feili.li@xmu.edu.cn.; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA. feili.li@xmu.edu.cn., Lozier MS; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA. susan.lozier@gatech.edu., Bacon S; National Oceanography Centre, Southampton, UK., Bower AS; Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Cunningham SA; Scottish Association for Marine Science, Oban, UK., de Jong MF; NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands., deYoung B; Department of Physics and Physical Oceanography, Memorial University, St. John's, NL, Canada., Fraser N; Scottish Association for Marine Science, Oban, UK., Fried N; NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands., Han G; Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC, Canada.; Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St. John's, NL, Canada., Holliday NP; National Oceanography Centre, Southampton, UK., Holte J; Scripps Institution of Oceanography, UCSD, La Jolla, CA, USA., Houpert L; National Oceanography Centre, Southampton, UK., Inall ME; Scottish Association for Marine Science, Oban, UK.; School of Geosciences, Edinburgh University, Edinburgh, UK., Johns WE; Department of Ocean Sciences, University of Miami, Miami, FL, USA., Jones S; Scottish Association for Marine Science, Oban, UK., Johnson C; Scottish Association for Marine Science, Oban, UK., Karstensen J; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany., Le Bras IA; Woods Hole Oceanographic Institution, Woods Hole, MA, USA.; Scripps Institution of Oceanography, UCSD, La Jolla, CA, USA., Lherminier P; Univ. Brest, Ifremer, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, Plouzané, France., Lin X; Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China., Mercier H; CNRS, Laboratoire d'Océanographie Physique et Spatiale, Plouzané, France., Oltmanns M; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany., Pacini A; Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Petit T; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA., Pickart RS; Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Rayner D; National Oceanography Centre, Southampton, UK., Straneo F; Scripps Institution of Oceanography, UCSD, La Jolla, CA, USA., Thierry V; Univ. Brest, Ifremer, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale, Plouzané, France., Visbeck M; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany., Yashayaev I; Bedford Institute of Oceanography, Dartmouth, NS, Canada., Zhou C; Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 May 24; Vol. 12 (1), pp. 3002. Date of Electronic Publication: 2021 May 24.
DOI: 10.1038/s41467-021-23350-2
Abstrakt: Changes in the Atlantic Meridional Overturning Circulation, which have the potential to drive societally-important climate impacts, have traditionally been linked to the strength of deep water formation in the subpolar North Atlantic. Yet there is neither clear observational evidence nor agreement among models about how changes in deep water formation influence overturning. Here, we use data from a trans-basin mooring array (OSNAP-Overturning in the Subpolar North Atlantic Program) to show that winter convection during 2014-2018 in the interior basin had minimal impact on density changes in the deep western boundary currents in the subpolar basins. Contrary to previous modeling studies, we find no discernable relationship between western boundary changes and subpolar overturning variability over the observational time scales. Our results require a reconsideration of the notion of deep western boundary changes representing overturning characteristics, with implications for constraining the source of overturning variability within and downstream of the subpolar region.
Databáze: MEDLINE