Atmospheric and Hydrospheric Sciences(A)
Session Sub-categoryOcean Sciences & Ocean Environment
Session IDA-OS10
TitleAtlantic climate variability, and its global impacts and predictability
Short TitleAtlantic variability
Main ConvenerNameIngo Richter
AffiliationJAMSTEC Japan Agency for Marine-Earth Science and Technology
Co-Convener 1NameNoel S Keenlyside
AffiliationGeophysical Institute Bergen
Co-Convener 2NameCarlos R Mechoso
AffiliationUniversity of California Los Angeles
Co-Convener 3NameYoshimitsu Chikamoto
AffiliationUtah State University
Session LanguageEE
ScopeThe Atlantic Ocean is subject to pronounced climate variations that occur on a wide range of time scales and can be globally connected to variations in other oceans and over continents. Atlantic multi-decadal variability (AMV) associated with the Atlantic meridional overturning circulation (AMOC) has long been known to have global impacts. In particular, AMV has been linked to changes in the Indian, Asian and South American summer monsoons, and also to changes in the Pacific associated with the "global hiatus". Interannual variability in the equatorial and subtropical Atlantic has also been shown to influence global climate, including over Asia. The freshening of the North Atlantic by melting of the Greenland ice cap is expected to influence all ocean basins via atmospheric bridges. Likewise, misrepresentation of the AMOC in climate models has been associated with model biases in the entire Northern Hemisphere. This session seeks observational, modeling, and theoretical studies on the mechanisms that determine the Atlantic mean climate and variability, as well as the predictability and global impacts of such variability. We also seek studies that evaluate climate model performance in the region. Topics include atmosphere-ocean-cloud interactions in the tropical Atlantic and their remote impacts; relationships between tropical and mid/high latitude variability; air-sea interaction along the Gulf Stream and its influence on cyclones and storm track evolution; variability in the Benguela upwelling region; influence of Agulhas leakage on the South Atlantic; coupled climate models biases in the region and their impacts; AMOC and long-term climate change.
Presentation FormatOral and Poster presentation
Co-Sponsoring Societies
(Society Members)
The Oceanographic Society of Japan
Invited Authors
  • Jules Balazs Kajtar (College of Engineering, Mathematics, and Physical Sciences, University of Exeter, UK)
  • Fred Kucharski (Abdus Salam International Centre for Theoretical Physics, Earth System Physics Section, Strada Costiera 11, 34151, Trieste, Italy)
Time Presentation No Title Presenter Abstract
Oral Presentation May 20 AM1
09:00 - 09:15 AOS10-01Understanding the multidecadal Northern Hemisphere climate variability from the perspective of Damped Stratosphere/Troposphere/Atlantic-Ocean coupled Oscillation.Nour-Eddine Omrani Abstract
09:15 - 09:30 AOS10-02The North Atlantic Oscillation as a driver of multidecadal variability of the AMOC, the AMO, and Northern Hemisphere climateThomas L Delworth Abstract
09:30 - 09:45 AOS10-03Dependence of the mechanisms associated with a potential multi-decadal AMOC-AMO-NAO feedback loop in MIROC modelAyako Yamamoto Abstract
09:45 - 10:00 AOS10-04Atlantic Multidecadal Variability in CESM1.0Edwin Schneider Abstract
10:00 - 10:15 AOS10-05Tropical Atlantic warming impacts on subdecadal variability in the PacificTakashi Mochizuki Abstract
10:15 - 10:30 AOS10-06Model under-representation of decadal Pacific trade wind trends and its link to tropical Atlantic biasJules Balazs Kajtar Abstract
Oral Presentation May 20 AM2
10:45 - 11:00 AOS10-07Tropical Atlantic warming as a possible trigger for the recent decadal trend in global monsoonYouichi Kamae Abstract
11:00 - 11:15 AOS10-08Tropical Atlantic influence on South Asian monsoon and Indo-Pacific regionFred Kucharski Abstract
11:15 - 11:30 AOS10-09Revisiting the effect of equatorial Pacific sea surface temperature variability on Atlantic Nino/Nina eventsHiroki Tokinaga Abstract
11:30 - 11:45 AOS10-10Equatorial Atlantic interannual variability in a CGCMShunya Koseki Abstract
11:45 - 12:00 AOS10-11Longitudinal variations of SST event characteristics in the tropical Atlantic and Pacific oceansTina Dippe Abstract
12:00 - 12:15 AOS10-12Examining forecast drift in the tropical AtlanticIngo Richter Abstract
Presentation No Title Presenter Abstract
Poster Presentation May 20 Core Time
AOS10-P01 South Atlantic Anti-Cyclone as a driver of Atlantic NiƱo variability Noel S Keenlyside Abstract
AOS10-P02 Extratropical influences on equatorial Atlantic variability Ingo Richter Abstract
AOS10-P03 Prediction and projection with anomaly coupling Shunya Koseki Abstract