Tropical Antarctic Teleconnections (TATE) Action Group

In spite of distinct connections between tropical and Antarctic climates, particularly over the South Pacific with the West Antarctic/Antarctic Peninsula regions, connection mechanisms are not fully explored. For example, atmospheric waves show spatial and temporal (seasonal, interannual) variations in both regions. All these variations of waves have important roles in the tropical-Antarctic connections between weather and climate over the different parts of the world with the Antarctic sea ice extent. Coupling of tropical forcing with the Southern Annular Mode (SAM) also impacts the weather and climate throughout the Southern Hemisphere. For example, extreme weather events in subtropical South America result from interactions between the tropical and the Antarctic regions.

The Action Group on Tropical Antarctic Teleconnections (TATE) aims to promote international collaboration, to enhance the coordination, and to encourage the participation in improving our current understanding of the mechanisms of tropical-Antarctic teleconnections. TATE is distinct from, but complementary to, the AntClim21 Scientific Research Programme in that it is concerned mainly with the processes linking the tropics to Antarctica which are not well understood yet are key to the future trajectory of Antarctic climate. AntClim21 is a much broader effort with an emphasis on implementing the coupled climate modelling for the 21st century.