The Tropical Pacific Observing System (TPOS) provides critical in situ and satellite observations of the ocean-atmosphere coupled system to improve global prediction (e.g., ENSO) across timescales. There have been significant advancements to the observing system, including a more capable TAO array, increased Argo float coverage, and plans for key process studies - i.e., the TPOS Equatorial Experiment (TEPEX). Despite these advances, there remains a major observing gap in the western Pacific. This absence of moorings poses an immediate risk to our ability to observe, understand and forecast ocean-atmosphere coupled variability.

This session invites presentations on the fundamental observations underpinning TPOS, TEPEX field campaign activities, and the use of TPOS data for improved process understanding and model improvement. We particularly welcome contributions that address the impacts of the Western Pacific deficit and collaborative strategies to bridge this gap utilizing conventional or emerging technologies (e.g., uncrewed systems).

• GC - Global Environmental Change
• OS - Ocean Sciences