What’s Next For Snow: Insights from the NASA Terrestrial Hydrology Program Community Snow Meeting

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Abstract
Earth's snow cover strongly influences the climate system and represents an important resource for agricultural, industrial, and domestic water use. The last decade of snow-focused research has improved our understanding of snow across scales. These efforts have culminated in new snow measurement instruments and methods, operational models for tracking snowpack evolution and forecasting snowmelt, multi-year and international snow and remote sensing field campaigns, and satellite mission proposals to measure snowpack water resources from space, with two recently submitted to NASA's Earth Explorer AO and the CSA Terrestrial Snow Mass Mission moving closer to a launch opportunity. Yet, shortcomings in each snowpack observation system still exist, including uncertainty in product performance, mission proposal advancement, and synergies across methods. The snow community aims to support and navigate next actionable steps toward improved and global-scale snow monitoring for climate and human purposes. Building from recent advances in snow research and operations and carrying momentum from the conclusion of the NASA SnowEx field campaigns, NASA's Terrestrial Hydrology Program sponsored a Community Snow Meeting in August 2024 in Boulder, Colorado, USA, with 200 total in-person and virtual meeting attendees. The meeting objectives were to outline existing and ongoing snowpack monitoring techniques, identify remaining knowledge gaps, and recommended next steps for the snow community. Here, we broadly summarize the state of numerous snow science sub-disciplines and share the collective insights and takeaways from the NASA Community Snow Meeting, intended to support ongoing and future pathways toward the next decade of snow science research and development.