Preprints
https://doi.org/10.5194/tc-2021-51
https://doi.org/10.5194/tc-2021-51

  02 Mar 2021

02 Mar 2021

Review status: a revised version of this preprint was accepted for the journal TC and is expected to appear here in due course.

A portable Lightweight In Situ Analysis (LISA) box for ice and snow analysis

Helle Astrid Kjær1, Lisa Lolk Hauge1, Marius Simonsen1, Zurine Yoldi1, Iben Koldtoft1, Maria Hörholdt2, Johannes Freitag2, Sepp Kipfstuhl1,2, Anders Svensson1, and Paul Vallelonga1,3 Helle Astrid Kjær et al.
  • 1Physics of Ice, Climate and Earth (PICE), Niels Bohr Institute, University of Copenhagen, Copenhagen 2200, Denmark
  • 2Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
  • 3UWA Oceans Institute, University of Western Australia, Crawley, WA, Australia

Abstract. Polar researchers spend enormous costs transporting snow and ice samples to home laboratories for simple analyses in order to constrain annual layer thicknesses and identifying accumulation rates of specific sites. It is well known that depositional noise, incurred from wind drifts, seasonally-biased deposition, melt layers and more, can influence individual snow and firn records and that multiple cores are required to produce statistically robust time series. Thus at many sites core samples are measured in the field for densification, but the annual accumulation and the content of chemical impurities are often represented by just one core to reduce transport costs. We have developed a portable Light weight in Situ Analysis (LISA) box for ice, firn and snow analysis capable of constraining annual layers through the continuous flow analysis of melt water conductivity and peroxide under field conditions. The box can run using a small gasoline-generator and weighs less than 50 kg. The LISA box was tested under field conditions at the deep ice core drilling site EastGRIP in Northern Greenland. Analysis of the top 2 metres of snow from 7 sites in Northern Greenland (Figure 1) allowed the reconstruction of regional snow accumulation patterns for the period 2015–2019.

Helle Astrid Kjær et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-51', Anonymous Referee #1, 18 Mar 2021
    • AC1: 'Reply on RC1', Helle Astrid Kjær, 25 May 2021
  • RC2: 'Comment on tc-2021-51', Anonymous Referee #2, 26 Apr 2021
    • AC2: 'Reply on RC2', Helle Astrid Kjær, 25 May 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-51', Anonymous Referee #1, 18 Mar 2021
    • AC1: 'Reply on RC1', Helle Astrid Kjær, 25 May 2021
  • RC2: 'Comment on tc-2021-51', Anonymous Referee #2, 26 Apr 2021
    • AC2: 'Reply on RC2', Helle Astrid Kjær, 25 May 2021

Helle Astrid Kjær et al.

Helle Astrid Kjær et al.

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Short summary
Ice core analysis are often done in home laboratories after costly transport of samples from the field. This limits the amounts of sample that is analysed. Here, as a first of its kind, we present a truly field portable continuous flow analysis (CFA) system for the analysis of impurities in snow, firn and ice cores while still in the field; the Light weight In Situ Analysis (LISA) box. Here LISA is demonstrated in Greenland to reconstruct accumulation, conductivity and peroxide in snow cores.