ROSES 2025: A.17 Hydrosphere

The close date above is the date for the Step-2 proposal due date. The Step-1 proposal due date is October 8, 2026. Step-2 proposals cannot be submitted if a Step-1 proposal was not submitted. NOTICE: September 18, 2026. Several corrections have been made: (1) Information about the 2027–2028 winter field campaign has been updated in Section 5, (2) Details on the redacted and anonymized budget requirements have been added to Table A.17-1, and (3) Text on Biographical Sketches and Current and Pending Support in Table A.17-2 has been improved. New text is in bold and deleted text is struck through NOTICE: Amended September 2, 2026. This amendment adds this new program element to ROSES-2025. Step-1 proposals are due October 8, 2026, and Step-2 proposals are due January 28, 2027. Any proposal not preceded by an on-time compliant Step-1 proposal will be returned without review. A briefing for potential proposers to this program element will occur Monday, September 14, from 2-3 PM Eastern Time. Connection information will be posted under "other documents" on the NSPIRES page for this program element. Proposals submitted to this program will be evaluated using dual anonymous peer review, see Section 8.2 of this program element. The Scientific/Technical/Management section of proposals is limited to 10 pages. Proposers to this program element are strongly encouraged to use the optional Earth Science Division template for the required summary table of work effort at https://science.nasa.gov/researchers/templates-for-earth-science-division-appendix-a-roses-proposals. This synopsis is a generic summary that is posted for each of the many individual "program elements" in NASA’s Research Opportunities in Space and Earth Sciences (ROSES) – 2025 solicitation. For specific information on this particular program element download and read the PDF of the text of this program element by going to Tables 2 or 3 of ROSES at https://solicitation.nasaprs.com/ROSES2025table2 and