Spectroscopic Measurements of Ammonia Total Column at the Atmospheric Monitoring Station of St. Petersburg State University

Abstract

The possibility of long-term monitoring of the NH₃ total column in the atmosphere from results of ground-based measurements of direct solar radiation in the mid-IR range was demonstrated based on an analysis of high-resolution FTIR-spectra recorded at the St. Petersburg State University atmospheric monitoring station in 2009–2022. Random and systematic uncertainties of the NH₃ total column were estimated. Results of 14-year FTIR monitoring of NH₃ in the atmosphere are presented and compared with data from independent satellite and ground-based measurements.