A.17 Hydrosphere
A.17 Hydrosphere supports researchers studying ocean physics, terrestrial hydrology, and precipitation, funding work on satellite measurements to advance understanding of water across Earth’s system.
Funder: NASA Research Opportunities (NSPIRES)
Due Dates: October 8, 2026 (Step-1) | January 28, 2027 (Step-2)
Summary: Supports research on the physics, distribution, movement, and transformation of Earth’s water across oceans, land, and the atmosphere.
Key Information: Step-2 proposals without an on-time, compliant Step-1 proposal will be returned without review.
Description
A.17 Hydrosphere is a NASA Research Announcement within Research Opportunities in Space and Earth Sciences 2025 (ROSES-2025), managed by NASA’s Science Mission Directorate and Earth Science Division. It solicits research in ocean physics, terrestrial hydrology, and precipitation science to advance understanding of water across the Earth system.
The opportunity specifically targets measurements of ocean salinity, snow depth, and precipitation from commercial satellites. These topics enhance NASA investments in the Fate of River Export and Surface Hydrology field campaign, the NISAR mission, and the Commercial Satellite Data Acquisition program. A fourth subelement encourages research extending these topics into other Earth science disciplines, both within and beyond the three core disciplines.
