Preprints
https://doi.org/10.5194/amt-2022-298
https://doi.org/10.5194/amt-2022-298
 
07 Nov 2022
07 Nov 2022
Status: this preprint is currently under review for the journal AMT.

Comparison of atmospheric CO, CO2 and CH4 measurements at Schneefernerhaus and the mountain ridge at Zugspitze

Antje Hoheisel1, Cedric Couret2, Bryan Hellack2, and Martina Schmidt1 Antje Hoheisel et al.
  • 1Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
  • 2German Environment Agency UBA, Germany

Abstract. The CO, CO2, and CH4 mole fractions have been measured since 2002 at the Environmental Research Station Schneefernerhaus (ZSF), which is located approximately 300 m below the summit of Mount Zugspitze. Although the station is located remotely at an altitude of 2666 m a.s.l., local pollution events by snow blowers and snow groomers can be detected in the high temporal resolution time series of seconds or minutes. Therefore, a time-consuming flagging process, carried out manually by the station manager, is necessary.

To examine local influences and the effectiveness of data flagging, a 290 m long intake line to the higher Zugspitz ridge was used to measure CO, CO2 and CH4 mole fractions at a potentially less polluted location between October 2018 and October 2020. The comparison of these two time series shows that the mountain ridge measurement is almost unaffected by local pollution. It also demonstrates that the influence of local pollution events on the Schneefernerhaus measurements is successfully removed by the station manager. Only a small deviation up to 0.24 ppm can be observed during the day between the CO2 time series of Schneefernerhaus and the mountain ridge in winter, probably due to anthropogenic sources.

Antje Hoheisel et al.

Status: open (until 28 Dec 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Antje Hoheisel et al.

Antje Hoheisel et al.

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Short summary
High-precision CO2, CH4 and CO measurements have been carried out at Zugspitze for decades. New technologies now make it possible to analyse these gases with high temporal resolution. This allows for detection of local pollution. For this purpose, measurements have been performed on the mountain ridge (ZGR) and are compared to routine measurements at Schneefernerhaus (ZSF). Careful manual flagging of pollution events in the ZSF data lead to consistency with the hardly influenced ZGR time series.