The National Oceanic and Atmospheric Administration (NOAA) intends to negotiate a sole source contract with the Information and Research Institute of Meteorology, Hydrology and Environment (IRIMHE) in Mongolia for the collection of climate research quality atmospheric air samples at the GML Global Greenhouse Gas Reference Network site in Dornogovi province. This procurement aims to ensure the continuity of high-quality atmospheric measurements, which have been collected at this site since 1992, and is critical for maintaining the integrity of NOAA's long-term data records. The contract period is set from the date of award until December 31, 2029, and interested parties who believe they can meet the requirements may submit documentation to the primary contact, Isabel Vigil, at isabel.vigil@noaa.gov, within 15 days of this notice.