The climate state of the Atlantic Ocean is known to exert a huge control and hence a decisive role on the surface climate over the neighbouring continents as well as that of the Arctic Ocean. Heat in the South Atlantic converges from both the Pacific and Indian Oceans and is carried northward to higher latitudes along the dynamically-rich oceanic current systems to key deep water formation regions where the atmosphere is in direct contact with the deep ocean. Understanding what drives the variability of the Atlantic Ocean on multiple time scales and long-term trends is thus imperative for more confident predictions of the climate in the future decades.

This session will offer the opportunity to focus on the dynamics, variability and trends along the key climatic current systems from the South Atlantic to the North Atlantic and into Arctic Ocean and how they are influenced by local-, large- or global-scale processes or teleconnections. We aim to bring together researchers using observations, ocean models and state-of-the-art climate models.

We welcome presentations addressing:

- Sources, dynamics, pathways and meridional connectivity of heat and freshwater anomalies from lower to higher latitudes
- Impact of large- and global-scale atmospheric modes on Atlantic Ocean circulation
- Variations and long-term trends in Atlantic overturning circulation and relationship to sea-level and sea-ice change

Invited speaker: Penny Holliday, National Oceanography Centre, UK

Co-organized as CL2.05
Convener: Léon Chafik | Co-conveners: Joakim Kjellsson, Iselin Medhaug, Gilles Reverdin
| Fri, 12 Apr, 08:30–10:15
Room 1.85
| Attendance Fri, 12 Apr, 10:45–12:30
Hall X4

Attendance time: Friday, 12 April 2019, 10:45–12:30 | Hall X4

Chairperson: Iselin Medhaug
X4.1 |
Stefanie Ypma, Nils Brüggemann, Sotiria Georgiou, Paul Spence, Henk Dijkstra, Julie Pietrzak, and Caroline Katsman
X4.3 |
Maintanence of the Lofoten Vortex by Eddy Mergers
Marta Trodahl, Pål Erik Isachsen, Nils Melsom Kristiansen, and Johan Nilsson
X4.5 |
| presentation
Benjamin Barton, Camille Lique, and Yueng-Djern Lenn
X4.6 |
Loic Houpert, Stuart Cunningham, Clare Johnson, Neil Fraser, Stefan Gary, Mark Inall, and Penny Holliday
X4.7 |
Thomas Martin, Annika Reintges, Mojib Latif, and Joakim Kjellsson
X4.8 |
Srinath Krishnan, Annica M.L. Ekman, Hans-Christen Hansson, Ilona Riipinen, Tanja Dallafior, and Anna Lewinschal