PO54A:
Atlantic Meridional Overturning Circulation: Past, Present, and Future V Posters


Session ID#: 11538

Session Description:
The Atlantic Meridional Overturning Circulation (AMOC) comprises warm upper waters flowing northward, becoming colder and denser until they form deep water in the Nordic and Labrador Seas that then returns southward through the North and South Atlantic. The AMOC transports a substantial amount of heat from the tropics and Southern Hemisphere toward the North Atlantic, where the heat is then transferred to the atmosphere. Consequently, changes in the AMOC could have a profound impact on many aspects of the global climate system. Climate models in unforced control integrations, simulate a rich spectrum of internal AMOC variability on seasonal, through decadal and multidecadal, to multicentennial timescales. The AMOC is also thought to be externally driven, e.g. by solar variability and changing volcanic activity. Anthropogenic climate change may also impact the AMOC, and most climate models project a significant slowing by the end of the century.

We invite contributions on the AMOC of the past millennium, studies that describe the present state of the AMOC including its dynamics, mechanisms of property transport, short-term temporal and spatial variability, and work addressing the future evolution of the AMOC. Observational (proxy and instrumental) as well as modelling studies are welcome.

Primary Chair:  Mojib Latif, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Chairs:  Monika Rhein, MARUM, University of Bremen, Bremen, Germany, Stuart A Cunningham, Scottish Association for Marine Science, Oban, United Kingdom and Gokhan Danabasoglu, NCAR, Boulder, CO, United States
Moderators:  Mojib Latif, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Monika Rhein, University of Bremen, Institute of Environmental Physics, Bremen, Germany, Gokhan Danabasoglu, National Center for Atmospheric Research, Boulder, CO, United States and Stuart A Cunningham, The Scottish Association for Marine Science, Oban, United Kingdom
Student Paper Review Liaison:  Mojib Latif, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
4255 Numerical modeling [OCEANOGRAPHY: GENERAL]
4262 Ocean observing systems [OCEANOGRAPHY: GENERAL]
4513 Decadal ocean variability [OCEANOGRAPHY: PHYSICAL]
Co-Sponsor(s):
  • PC - Past, Present and Future Climate

Abstracts Submitted to this Session:

 
Atlantic Meridional Overturning Circulation (AMOC) geostrophic transport: Comparison of the RAPID time series with hydrography from 2004 to 2011 (90082)
Neela Morarji, National Oceanography Centre Southampton, Ocean and Earth Science, Southampton, United Kingdom, David Smeed, National Oceanography Center, Soton, Southampton, United Kingdom, Gerard D McCarthy, National Oceanography Centre, Southampton, United Kingdom and Eleanor Frajka-Williams, University of Southampton, United Kingdom
 
Absolute velocity and transport across the Extended Ellett Line in the subpolar North Atlantic (90216)
Elizabeth Comer1, Naomi P Holliday2 and Sheldon Bacon2, (1)National Oceanography Centre, Ocean and Earth Science, Southampton, United Kingdom, (2)National Oceanography Centre, Southampton, United Kingdom
 
Observed Transport Variations of the Main Upper AMOC Branch in the North Atlantic (90371)
Achim Roessler1, Monika Rhein2, Dagmar Kieke1 and Christian Mertens1, (1)University of Bremen, Bremen, Germany, (2)University of Bremen, Institute of Environmental Physics, Bremen, Germany
 
Changes of Florida Current Temperature and Salinity Transport and Impact on North Atlantic Circulation (90504)
Zoltan B Szuts, Applied Physics Laboratory University of Washington, Seattle, WA, United States and Christopher S Meinen, Atlantic Oceanographic and Meteorological Laboratory, Physical Oceanography Division, Miami, FL, United States
 
The Upper Branch of the AMOC in the Subpolar North Atlantic in Model and Observation (90652)
Tilia Breckenfelder1,2, Monika Rhein1,2, Achim Roessler3, Erik Behrens4, Claus W Boning5, Arne Biastoch5 and Christian Mertens3, (1)MARUM, University of Bremen, Bremen, Germany, (2)University of Bremen, Institute of Environmental Physics, Bremen, Germany, (3)University of Bremen, Bremen, Germany, (4)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (5)GEOMAR Helmholtz Centre for Ocean Research Kiel, FB1 Ocean Circulation and Climate Dynamics, Kiel, Germany
 
The AMOC and subpolar gyre circulation at the OSNAP section in summer 2014 (90865)
Naomi P Holliday, Brian King, Elaine McDonagh and Sheldon Bacon, National Oceanography Centre Southampton, United Kingdom
 
A weak AMOC in a cold climate: Causes and remedies for a bias in the low-resolution version of the UK Earth System Model (91019)
Colin Jones, National Centre for Atmospheric Science, Leeds, United Kingdom and Till Kuhlbrodt, NCAS, Department of Meteorology, University of Reading, Reading, United Kingdom
 
Contradictory Pathways between Labrador Sea Water Advection and Property Propagation (91524)
Sijia Zou and M Susan Lozier, Duke University, Durham, NC, United States
 
The Charlie-Gibbs Fracture Zone: A Crossroads of the Atlantic Meridional Overturning Circulation (91603)
Amy S Bower1, Heather H Furey1 and Xiaobiao Xu2, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Florida State University, Center for Ocean-Atmospheric Prediction Studies, Tallahassee, FL, United States
 
Line W measurements of the Deep Western Boundary Current reflect changes in Labrador Sea deep convection (91725)
Isabela Le Bras1,2, Ruth G Curry2, Igor Yashayaev3 and John Merrill Toole2, (1)MIT-WHOI Joint Program, Physical Oceanography, MA, United States, (2)WHOI, Woods Hole, MA, United States, (3)Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada
 
Why is the AMOC Monostable in Coupled General Circulation Models? (91796)
Wei Liu, Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, United States
 
Atlantic Multidecadal Variability climate impacts: Idealized Experiments with NCAR and GFDL coupled climate models (91913)
Frederic S Castruccio1, Yohan Ruprich-Robert2, Rym Msadek3, Stephen G Yeager1, Gokhan Danabasoglu1 and Thomas L Delworth2, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)GFDL/NOAA, Princeton, NJ, United States, (3)GFDL/NOAA Princeton University, Princeton, NJ, United States
 
Variability in Lagrangian-derived throughput from the subtropical to the subpolar gyres in the North Atlantic and its impact on inter-gyre heat transport (91944)
Nicholas Foukal, Duke University, Durham, NC, United States and M Susan Lozier, The Oceanography Society
 
From SYNOP to AMOC: Stirring by deep cyclones and the evolution of Denmark Strait Overflow Water observed at Line W (92346)
Magdalena Andres1, John Merrill Toole1, Daniel J Torres1, William M Smethie Jr2, Terrence M Joyce1 and Ruth G Curry1, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Lamont -Doherty Earth Observatory, Palisades, NY, United States
 
On the Multidecadal SST Variability in the Tropical North Atlantic (92916)
Who M Kim1, Ping Chang2, Gokhan Danabasoglu1 and Stephen G Yeager1, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)Texas A & M University College Station, College Station, TX, United States
 
Dynamics of the Basin-wide North Atlantic Deep Water Flux and Deep Western Boundary Current at 26.5°N (93201)
Jian Zhao, Woods Hole Oceanographic Institution, Woods Hole, MA, United States