We welcome abstracts on Atmospheric Rivers and extremes related to them in the climate system.  Atmospheric rivers (ARs) are narrow and elongated regions of horizontal water vapor transport that play important roles in the global water cycle and weather, water, and climate extremes. Increasing evidence shows that ARs have footprints and impacts in many regions across the world, and that they may undergo notable changes in future climate. The range of processes and the hazards/benefits associated with ARs represent a key challenge to both the science and applications communities. Meeting this challenge in the context of climate variations and change calls for better communication, understanding, and collaboration across a variety of disciplines. To highlight and enhance cross-boundary recognition of ARs as a particular type of extreme events, this session encourages contributions from multiple disciplines and those focusing on different geographic/socioeconomic locations. Expected topics include atmospheric, oceanic, hydrologic, ecologic, and other aspects of ARs under the current and future climates, the interactions between ARs and other weather/climate phenomena, and emerging applications of the AR science in the management of extreme events.