Simons Foundation Opportunities

The letter-of-intent deadline is 6 October 2026 at 12:00 noon Eastern Time. Invited full proposals are due 17 February 2027 at 12:00 noon Eastern Time. Standard awards may request up to US$1.5 million inclusive of 20% indirect costs over three years, with the foundation estimating up to 13 awards beginning 1 August 2027. Priority areas include materials for stratospheric aerosol injection and cirrus cloud thinning, laboratory characterization, approaches to minimize cirrus formation, turbulence modeling and improved global-scale modeling. Social-science research and in-situ aerosol-release field experiments are outside this call.

Proposals may involve up to three PIs. PIs and participants may be based at U.S. or non-U.S. institutions subject to the official country and institution restrictions. University PIs must hold a tenured, tenure-track or equivalent position in a department with a PhD program. PIs at national laboratories or nonacademic institutions must be PhD-level full-time non-visiting research or senior scientists or equivalent. The foundation strongly encourages applications from scientists in the Global South.