Source and Chemistry of Hydroxymethanesulfonate (HMS) in Fairbanks, Alaska.

ABSTRACT: Fairbanks, Alaska, is a subarctic city with fine particle (PM_2.5) concentrations that exceed air quality regulations in winter due to weak dispersion caused by strong atmospheric inversions, local emissions, and the unique chemistry occurring under the cold and dark conditions. Here, we report on observations from the winters of 2020 and 2021, motivated by our pilot study that showed exceptionally high concentrations of fine particle hydroxymethanesulfonate (HMS) or related sulfur(IV) species (e.g., sulfite and bisulfite). We deployed online particle-into-liquid sampler-ion chromatography (PILS-IC) in conjunction with a suite of instruments to determine HMS precursors (HCHO, SO₂) and aerosol composition in general, with the goal to characterize the sources and sinks o

SUBMITTER: Campbell JR 

PROVIDER: S-EPMC9227704 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature