Raw values of boundary layer IO measurements at Neumayer III station, Antarctica from January 2016 to August 2018

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 a...

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Bibliographic Details
Main Authors: Nasse, Jan-Marcus, Frieß, Udo, Schaefer, Thomas, Jurányi, Zsófia, Hoffmann, Helene, Weller, Rolf
Format: Dataset
Language:English
Published: PANGAEA 2023
Subjects:
Air chemistry observatory
DATE/TIME
Date/time end
Date/time start
Detection level
Dronning Maud Land
Antarctica
Iodine monoxide
error
Iodine monoxide mixing ratio
Long-Path Differential Optical Absorption Spectroscopy (LP-DOAS)
Method comment
Neumayer_based
Neumayer_SPUSO
NEUMAYER III
SPUSO
Total atmospheric light path
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.900914
https://doi.org/10.1594/PANGAEA.900914
Description
Summary: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 used depending on visibility. The DOAS evaluation of IO was performed between 424.3 and 451.3 nm until February 15th, 2017 when another grating was used. After February 15th, 2017, the evaluation was performed between 411 and 438 m. Fits with residual optical density RMS (root mean square) values larger than 3.5e-4 (later 2.0e-4) were discarded. The resulting mean residual RMS are 2.2e-4 and 3.2e-4 (1.8e-4 later) respectively. The mean detection limit is 4.5 (2.6 later) pmol/mol. The data sets include the observations below the respective detection limit scattered around 0, which due to the spectral analysis with the DOAS approach can include negative values. Significant data points can be selected using the separately provided detection limits (3-sigma criterion - recommended). Alternatively, the total errors can be used. The mixing ratios provided here were calculated using meteorological data from Neumayer III station already published on PANGAEA. A list of data sets is included in the "Related to" section of the bibliography this data set is part of. The spectral raw data of the measurements is stored on the measurement data server of the Institute of Environmental Physics, University of Heidelberg.

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