NSF 25-510: Coupling, Energetics, and Dynamics of Atmospheric Regions (CEDAR)

Research Focus

The CEDAR program supports research to understand the behavior of Earth's upper atmosphere—from the middle atmosphere through the thermosphere, ionosphere, and exosphere—in terms of coupling, energetics, dynamics, and chemistry on regional and global scales. Research investigates how upper atmospheric responses arise from lower atmospheric perturbations (gravity waves, tides, planetary waves) and from solar radiation and particle inputs from above. The program also now includes comparative aeronomy studies of other planets' atmospheres in our solar system directly relevant to Earth's upper atmosphere. Projects employ ground-based and space-based observations, theory, modeling, data assimilation, and laboratory research. Novel approaches using artificial intelligence and machine learning tools, open data, and open science practices are encouraged. The program emphasizes a systems perspective of geospace, integrating observations and modeling to address mesosphere-ionosphere-thermosphere-exosphere coupling, horizontal regional coupling, and impacts from the lower atmosphere and magnetosphere.

At a Glance

• Who can apply: U.S. institutions of higher education (including community colleges), non-profit research organizations, for-profit companies, and federally recognized Tribal Nations. PIs may submit up to 2 proposals per target date.
• Funding & project length: Approximately $150,000 per year; projects typically 3 years (1–5 years with justification).
• Award mechanism: Standard Grant or Continuing Grant; 10–15 awards annually from $3,000,000 total program budget.
• Key dates: Full proposal target date March 5, 2025 (first Wednesday in March, annually thereafter).
• Best fit for: Atmospheric scientists, aeronomers, and geospace researchers using observations, modeling, and data analysis to study upper atmosphere dynamics, chemistry, and coupling across altitudes and regions.