Session 01 - Short Summary

This session invites abstracts examining the processes and feedback mechanisms linking the Arctic to lower latitudes—whether through meridional atmospheric/oceanic transport or coupled ocean-atmosphere interactions. Both observational and modeling studies on this topic are welcome. Regarding the ocean, the wintertime decline of Arctic sea ice is most pronounced in the Barents and Kara Seas, which can be viewed as both a cause and a consequence of anomalous oceanic and atmospheric heat and moisture convergence. Advection of anomalous ocean signals, such as fresh water export from the Arctic, can reach the North Atlantic via two separate and relatively rapid pathways. In terms of the atmosphere, marine cold-air outbreaks (MCAOs) and warm-air intrusions (WAIs) account for a significant portion of heat and moisture transport between the Arctic and low latitudes. Yet, these processes and their coupling remain inadequately represented in Earth system and weather models. Abstracts presenting results from investigations of the above processes and feedbacks using regional and Earth system models as well as data from recent field campaigns investigating MCAOs and WAIs—such as HALO-(AC)³, MOSAiC, CAESAR, COMBLE, ACAO, and M-Phase—are welcome.