cc-by-4.0Yee Jun ThamNina SarnelaSiddharth IyerQinyi LiHélène AngotLauriane L. J. QuéléverIvo BeckTiia LaurilaLisa J. BeckMatthew BoyerJavier Carmona-GarcíaAna Borrego-SánchezDaniel Roca-SanjuánOtso PeräkyläRoseline C. ThakurXu-Cheng HeQiaozhi ZhaDean HowardByron BlomquistStephen ArcherLudovic BariteauKevin PosmanJacques HueberDetlev HelmigHans-Werner JacobiHeikki JunninenMarkku KulmalaAnoop S. MahajanAndreas MasslingHenrik SkovMikko SipiläJoseph S. FranciscoJulia SchmaleTuija JokinenAlfonso Saiz-Lopez2025-03-242023-02-202023-02-20https://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/10746The data includes: 1) Data for the time series of HClO3 and HClO4 together with relevant data from the Villum Research Station observations. 2) Data for the time series of HClO3 from Ny-Ålesund observation. 3) Data of the estimated cross-section and photolysis rate of HClO3 and HClO4. Data are also available from the corresponding authors upon request. Openchlorine oxyacidsData for Widespread detection of chlorine oxyacids in the Arctic atmosphere: Villum Research Station and Ny-Ålesund observationsdataset