PO13D:
Observing and Modeling the Meridional Overturning Circulation in the South Atlantic: Causes of Variability and Impacts on Climate, Weather, and Ecosystems I


Session ID#: 9214

Session Description:
The meridional overturning circulation (MOC) in the Atlantic is a key element of the time-variable coupled climate system and may have played a significant role in the subsurface sequestration of heat during the recent global warming hiatus.  The South Atlantic Ocean is unique in its role as a nexus and melting pot for water masses formed elsewhere and transiting between the far regions of the World Ocean. In the past decade, the South Atlantic MOC observing system has expanded to include moored arrays and intense hydrographic surveys, providing tantalizing glimpses of the variability introduced to the MOC. Here, we invite contributions of recent studies quantifying and analyzing South Atlantic MOC (SAMOC) variability over time scales ranging from intra-seasonal to decadal using recently collected in situ observations, remotely sensed data, theory, and numerical modeling. This includes, but is not limited to: an exploration of the local and remote SAMOC forcing mechanisms, analysis of how SAMOC variations relate to inter-ocean exchanges and storage of heat, salt, and nutrients, and an evaluation of the impacts of SAMOC on regional and global climate, extreme weather, and/or marine ecosystems.
Primary Chair:  Maria Paz Chidichimo, Argentine Scientific Research Council (CONICET); Hydrographic Service, Buenos Aires, Argentina
Chairs:  Rebecca Marie Hummels, GEOMAR, Kiel, Germany, Renellys C Perez, UM/CIMAS & NOAA/AOML, Miami, FL, United States and Regina Rodrigues, UFSC Federal University of Santa Catarina, Florianópolis, Brazil
Moderators:  Maria Paz Chidichimo, Argentine Scientific Research Council (CONICET); Hydrographic Service, Buenos Aires, Argentina, Regina Rodrigues, UFSC Federal University of Santa Catarina, Florianópolis, Brazil, Renellys C Perez, UM/CIMAS, Miami, FL, United States and Rebecca Marie Hummels, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Student Paper Review Liaison:  Maria Paz Chidichimo, Argentine Scientific Research Council (CONICET); Hydrographic Service, Buenos Aires, Argentina
Index Terms:

1637 Regional climate change [GLOBAL CHANGE]
4215 Climate and interannual variability [OCEANOGRAPHY: GENERAL]
4262 Ocean observing systems [OCEANOGRAPHY: GENERAL]
4513 Decadal ocean variability [OCEANOGRAPHY: PHYSICAL]
Co-Sponsor(s):
  • A - Air-sea Interactions and Upper Ocean Processes
  • HE - High Latitude Environments
  • ME - Marine Ecosystems
  • PC - Past, Present and Future Climate

Abstracts Submitted to this Session:

PO13D-01
Recent Daily MOC Variability Estimates at 34.5°S from in situ Observations and Comparisons with Estimates at 26.5°N (91277)
Sabrina Speich, Ecole Normale Supérieure Paris, Paris, France, Christopher S Meinen, Atlantic Oceanographic and Meteorological Laboratory, Physical Oceanography Division, Miami, FL, United States, Edmo J Campos, USP University of Sao Paulo, São Paulo, Brazil, Alberto R Piola, Servicio de Hidrografía Nava, Buenos Aires, Argentina, Silvia Lucia Garzoli, NOAA/AONL/PhOD, Miami, FL, United States, Michael John Roberts, Department of Environmental Affairs, Cape Town, South Africa, Isabelle Jane Ansorge, university of Cape Town, Department of Oceanography, Cape Town, South Africa, Renellys C Perez, UM/CIMAS, Miami, FL, United States, Shenfu Dong, University of Miami, Miami, FL, United States, Thierry Terre, Ifremer, Laboratoire de Physique des Océans, Plouzané, France and Marcel Van den Berg, Department of Environmental Affairs, Oceans & Coasts Research Branch, Cape Town, South Africa
PO13D-02
Deep Western Boundary Current Variability at 34.5°S During 2009-2015 (87082)
Christopher S Meinen1, Silvia Lucia Garzoli2, Edmo J Campos3, Alberto R Piola4, Maria Paz Chidichimo5, Renellys C Perez6, Shenfu Dong7 and Olga T Sato3, (1)Atlantic Oceanographic and Meteorological Laboratory, Physical Oceanography Division, Miami, FL, United States, (2)UM/CIMAS & NOAA/AOML, Miami, FL, United States, (3)USP University of Sao Paulo, São Paulo, Brazil, (4)Servicio de Hidrografía Nava, Buenos Aires, Argentina, (5)National Scientific and Technical Research Council (CONICET) / SHN, Buenos Aires, Argentina, (6)UM/CIMAS, Miami, FL, United States, (7)University of Miami, Miami, FL, United States
PO13D-03
Interannual to Decadal Variability of Meridional Transports Across the SAMOC Basin Wide Array (SAMBA) in Simulations with an Eddy-resolving Global Ocean Model (87546)
Edmo J Campos and Tercio Ambrizzi, USP University of Sao Paulo, São Paulo, Brazil
PO13D-04
Atlantic Multi-decadal Oscillation covaries with Agulhas leakage (88164)
Arne Biastoch1, Jonathan V Durgadoo1, Adele K Morrison2, Erik van Sebille3, Wilbert Weijer4 and Stephen Matthew Griffies5, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)Princeton University, AOS Program, Princeton, NJ, United States, (3)Imperial College London, Grantham Institute, London, SW7, United Kingdom, (4)Los Alamos National Laboratory, Los Alamos, NM, United States, (5)Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
PO13D-05
Intraseasonal to Interannual Variability of the Brazil Current Transport Measured at 34.5°S - Baroclinic and Barotropic Contributions (88969)
Maria Paz Chidichimo, Argentine Scientific Research Council (CONICET); Hydrographic Service, Buenos Aires, Argentina, Alberto R Piola, Argentine Hydrographic Service, Buenos Aires, Argentina, Christopher S Meinen, Atlantic Oceanographic and Meteorological Laboratory, Physical Oceanography Division, Miami, FL, United States, Edmo J Campos, USP University of Sao Paulo, São Paulo, Brazil, Silvia Lucia Garzoli, NOAA/AONL/PhOD, Miami, FL, United States, Sabrina Speich, Ecole Normale Supérieure Paris, Paris, France, Renellys C Perez, UM/CIMAS, Miami, FL, United States, Shenfu Dong, University of Miami, Miami, FL, United States, Ricardo P Matano, Oregon State Univ, Corvallis, OR, United States and Vincent Combes, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
PO13D-06
On the Suitability of North Brazil Current Transport Estimates for Monitoring Basin-Scale AMOC Changes (88172)
Siren Ruhs1, Klaus Getzlaff1, Jonathan V Durgadoo2, Arne Biastoch2 and Claus W Boning2, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, (2)GEOMAR Helmholtz Centre for Ocean Research Kiel, FB1 Ocean Circulation and Climate Dynamics, Kiel, Germany
PO13D-07
Tracking AAIW Properties, Transformations and Paths in the South Atlantic from Argo Floats Data and a Global Ocean Model (91771)
Bruno Blanke, Laboratoire d'Océanographie Physique et Spatiale (LOPS), Brest, France
PO13D-08
Estimating the Southern Ocean Overturning Circulation in Thermohaline Coordinates (91670)
Dafydd Gwyn Evans1, Jan David Zika2, Sheldon Bacon2 and A. J. George Nurser3, (1)University of Southampton, Southampton, SO14, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)National Oceanography Centre, Marine Systems Modelling, Southampton, United Kingdom
See more of: Physical Oceanography/Ocean Circulation