From interannual to multidecadal time scales, there is strong climate variability over both the tropical and extratropical regions of the globe. Several modes of both extratropical atmospheric circulation (NAM/AO, NPO, PNA, NAO, SAM/AAO, etc.) and sea surface temperature (AMO, PDO, North Pacific Gyre Oscillation (NPGO), North Atlantic tripole (NAT), etc.) have been proposed to explain the extratropical climate variability. These modes have profound impacts on the global and regional climates (i.e., temperature, precipitation, frequency of high-impact weather/climate events such as hurricane/typhoon, drought/flood and cold/heat waves, etc.). The associated dynamics and physical processes, such as the ocean-atmosphere interaction, coupled oceanic-atmospheric bridge, atmospheric internal dynamics and oceanic dynamics, are important for understanding the tropical-extratropical climate variability and thus have implications for the interannual to decadal predictability. However, the relevant dynamics and processes are not very well represented in current climate system models. Often this is due to a lack of observations of the processes being modelled. Contributions are welcome from, but not limited to, research on observational, theoretical and modeling studies on the following topics:
1. Physical processes and dynamics in the atmosphere/ocean and atmosphere-ocean coupling associated with the tropical-extratropical climate variability on time scales from years to multi-decades.
2. The impacts and teleconnections of the tropical-extratropical climate variability on a broad range of time scales and underlying physical mechanisms.
3. Comparison of observed and simulated tropical-extratropical climate variability and its climate impacts.
4. Predictability, prediction and projection of tropical-extratropical atmospheric and oceanic variability at various time scales.

Co-organized as AS1.20/OS1.32
Convener: Cheng Sun | Co-conveners: Fred Kucharski, Jianping Li, In-Sik Kang, Fei-Fei Jin, Joke Lübbecke, Marta Martín-Rey, Belen Rodríguez de Fonseca
| Thu, 11 Apr, 10:45–12:30, 14:00–18:00
Room E2
| Attendance Thu, 11 Apr, 08:30–10:15
Hall X5

Thursday, 11 April 2019 | Room E2

Chairperson: Cheng Sun, Fred Kucharski
11:15–11:30 |
| solicited
Ruiqiang Ding
11:30–11:45 |
Marianna Benassi, Stefano Materia, Paolo Ruggieri, and Silvio Gualdi
11:45–12:00 |
| Highlight
Tsubasa Takigawa, Yu Kosaka, Bunmei Taguchi, and Lea Svendsen
12:00–12:15 |
| Highlight
Lea Svendsen, Noel Keenlyside, Yu Kosaka, and Bunmei Taguchi
12:15–12:30 |
Martín Jacques-Coper, Daniel Veloso, Amanda Valencia, Eric C.J. Oliver, and Aldo Montecinos
Lunch break
Chairperson: Joke Lübbecke, Marta Martín-Rey
14:00–14:15 |
| solicited
Noel Keenlyside
14:15–14:30 |
Elsa Mohino, Belen Rodriguez-Fonseca, C. Roberto Mechoso, Teresa Losada, and Irene Polo
14:45–15:00 |
John Bruun, Katy Sheen, Jozef Skakala, Spiros Evangelou, Matt Collins, and Ruth Geen
15:00–15:15 |
Hyacinth Nnamchi, Mojib Latif, Noel Keenlyside, and Joakim Kjellsson
15:15–15:30 |
Marie-Lou Bachelery, Serena Illig, and Mathieu Rouault
15:30–15:45 |
Andrew Friedman, Gabriele Hegerl, Andrew Schurer, Shih-Yu Lee, Wenwen Kong, and John Chiang
Coffee break
Chairperson: Jianping Li, Belén Rodríguez de Fonseca
16:15–16:30 |
| solicited
Michael Ghil, Yizhak Feliks, and Justin Small
17:00–17:15 |
Dario Nicolì, Alessio Bellucci, Doroteaciro Iovino, Paolo Ruggieri, and Silvio Gualdi
17:30–17:45 |
Jiwoo Lee, Kenneth Sperber, Peter Gleckler, Céline Bonfils, and Karl Taylor