Long-Path DOAS measurements of boundary layer trace gas mixing ratios at Neumayer III station, Antarctica from January 2016 to August 2018 ...

• Main Authors: Nasse, Jan-Marcus, Frieß, Udo, Schaefer, Thomas, Jurányi, Zsófia, Hoffmann, Helene, Weller, Rolf
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2023
• Subjects: absorption spectroscopy; atmospheric remote sensing; bromine; chlorine; DOAS; iodine; Neumayer; tropospheric halogens; tropospheric trace gases; Air chemistry observatory; Neumayer_based; NEUMAYER III; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.900919; https://doi.pangaea.de/10.1594/PANGAEA.900919

From January 2016 until August 2018, an automated Long-Path Differential Optical Absorption Spectroscopy (LP-DOAS) instrument was operated at the German research station Neumayer III (NMIII) in coastal Antarctica to measure trace gas mixing ratios in the boundary layer close to the ground (average altitude above the snow surface: 4m). Two different atmospheric light paths with total lengths of 3100 m and 5900m were available and used depending on the spectral window and visibility.Detectable species were bromine monoxide (BrO), bromine dioxide (OBrO), molecular bromine (Br2), chlorine monoxide (ClO), chlorine dioxide (OClO), iodine monoxide (IO), iodine dioxide (OIO), molecular iodine (I2), sulphur dioxide (SO2), nitrogen dioxide (NO2), nitrous acid (HONO), nitrate (NO3), and ozone (O3). The evaluated data was filtered based on RMS (root mean square) thresholds of optical density residuals of the DOAS fits (see individual data sets for respective values). Detection limits based on a 3-sigma criterion were ... : To calculate the mixing ratios provided in the data set, the meteorological data sets given in the "Related to" sections were used. ...