Agricultural emissions are one of the largest poorly-measured categories in U.S. atmospheric science. Farms and feedlots produce methane, ammonia, ozone precursors, and particulate matter at scale, but ground-level monitoring networks were designed for urban and industrial sources. FarmFlux is NASA's attempt to close that gap from the air. The mission will fly a Dynamic Aviation A200 aircraft at low altitude over farmland near Greeley, Colorado, in October 2026, carrying more than a dozen sensors simultaneously measuring multiple pollutants and their atmospheric interactions. This is not a single-gas survey — it's a multi-species emissions profile designed to capture the complex chemistry that occurs when agricultural outputs mix with ambient air. Greeley is not a random choice. Weld County, Colorado, sits at the intersection of intensive cattle feedlot operations and irrigated cropland, making it one of the densest agricultural emissions environments in the western United States. The data collected here will serve as a baseline for a sector that has historically self-reported or been modeled from sparse ground stations. The campaign then moves to Amarillo, Texas, in late October through early November 2026 — another feedlot-heavy region — before scaling up significantly. From March to July 2027, a NASA P-3 Orion aircraft will fly research missions over Midwest croplands and California's Central Valley during the growing season, when fertilizer application and crop metabolism drive peak emissions. The institutional structure matters. FarmFlux is jointly led by NASA Goddard, Colorado State University, and Boston University — combining federal remote-sensing capability with two universities that have deep agricultural and atmospheric science programs. Colorado State in particular has decades of livestock emissions research. This is not NASA parachuting into a new domain; it's a partnership that brings domain expertise to the sensor platform. The policy implications are downstream but significant. EPA regulation of agricultural emissions has been politically fraught partly because the data foundation is thin. Independent, high-resolution airborne measurements from a NASA-led mission would give regulators — and farmers — a much clearer picture of what's actually entering the atmosphere, at what concentrations, and from which sources. That data either confirms existing models or rewrites them. What FarmFlux does not do, at least in this phase, is mandate anything. This is pure measurement infrastructure — generative science that builds the knowledge base without which policy is guesswork. The value will be determined by whether the data is made publicly available, whether it integrates with satellite observations, and whether it survives the transition from campaign to long-term monitoring.
