Otemma
Published July 7, 2026 | Version v1
Dataset Embargoed

Meltwater discharge, suspended sediment and bedload, air temperature and precipitation at the Otemma Glacier terminus (2020, 2021 and 2022 melt seasons)

Description

This dataset extends existing timeseries from the Otemma Glacier terminus on meltwater discharge (Müller and Miesen, 2022), suspended sediment and bedload flux (Mancini et al., 2023), and air temperature and precipitation (Müller, 2022) into the 2022 melt season.

Water and sediment flux measurements were performed at gauging station GS1 (aka Station 1) located in the main proglacial river, approx. 0.35 downstream of the glacier terminus. Air temperature and precipitation data were collected at the "Glacier snout station" adjacent to GS1. Data collection specifics for the 2022 melt season are provided in the report2022.pdf.

Extended flux data are also provided for 2020 and 2021 given the difference in analytical scope between Mancini et al. (2023b) and Jenkin et al. (in prep). The dataset archived at Mancini et al., 2023 has been post-processed for comparative analysis between two different gauging stations (upstream GS1 and downstream GS2), while the work currently in development requires the most temporally complete timeseries of subglacial sediment export at the upstream GS1. Compared to the previously published dataset, the data provided here for GS1 in 2020 and 2021 include: (i) short extensions of the timeseries, (ii) removal of a suspended sediment clipping threshold, (iii) gap filling for suspended sediment in 2020 using real, quality-controlled measured data.

DATA:
river.csv - water and sediment flux timeseries from GS1 with columns:
year: yyyy
frac_day: fractional day of the year referenced to Swiss local time. During the melt season this corresponds to CEST (UTC+2). For example, frac_day = 177.5 in 2021 corresponds to 26 June 2021 12:00:00 (local time).
dt: measurement interval [mins]
Qw: meltwater discharge [m3/s]
Qss: suspended sediment flux [kg/s]
Qb: bedload flux [kg/s]
Qxx_lo or Qxx_hi: the lower and upper uncertainty bounds for Qw, Qss, Qb [kg/s]

weather.csv - air temperature and precipitation timeseries spanning 18 Nov 2021 to 16 Aug 2022  from 'Glacier snout station' with columns:
datetime: local time (UTC+01 with DST) [yyyy-mm-dd hh:mm:ss] 
temperature: air temperature [°C]
precipitation: liquid or solid precipitation [mm w.eq.]

Files

Embargoed

The files will be made publicly available on February 1, 2027.

Reason: The authors have a publication in preparation that uses these data. Access restrictions will be lifted upon publication. Prior versions may have been accessed under their original licence, having been released publicly while the article was in peer review. For scholarly courtesy, we ask users to contact the authors before publishing analyses based on these data while the associated manuscript is in preparation.

Additional details

Funding

Swiss National Science Foundation
Glacier recession, glacial sediment export and the morphodynamics of proglacial forefields 188734

References

  • Mancini, D., Dietze, M., Jenkin, M., Miesen, F.M., Lane, S.N., 2023. Suspended sediment load and bedload flux from the Glacier d'Otemma proglacial forefield (summers 2020 and 2021). https://doi.org/10.5281/zenodo.8380815
  • Müller, T., Miesen, F., 2022. Stream discharge, stage, electrical conductivity & temperature dataset from Otemma glacier forefield, Switzerland (from July 2019 to October 2021). https://doi.org/10.5281/zenodo.6202732
  • Müller, T., 2022. Weather dataset from Otemma glacier forefield, Switzerland (from 14 July 2019 to 18 November 2021). https://doi.org/10.5281/zenodo.6106778
  • Mancini, D., Dietze, M., Müller, T., Jenkin, M., Miesen, F., Roncoroni, M., Nicholas, A.P., Lane, S.N., 2023b. Filtering of the Signal of Sediment Export From a Glacier by Its Proglacial Forefield. Geophysical Research Letters 50, e2023GL106082. https://doi.org/10.1029/2023GL106082