A portable lightweight in situ analysis (LISA) box for ice and snow analysis

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There are enormous costs involved in transporting snow and ice samples to home laboratories for "simple"analyses in order to constrain annual layer thicknesses and identify accumulation rates of specific sites. It is well known that depositional noise, incurred from factors such as wind drifts, seasonally biased deposition and melt layers 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 "lightweight in situ analysis"(LISA) box for ice, firn and snow analysis that is capable of constraining annual layers through the continuous flow analysis of meltwater conductivity and hydrogen 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 East Greenland Ice-core Project (EastGRIP) deep ice core drilling site in northern Greenland. Analysis of the top 2 m of snow from seven sites in northern Greenland allowed the reconstruction of regional snow accumulation patterns for the 2015-2018 period (summer to summer).

OriginalsprogEngelsk
TidsskriftCryosphere
Vol/bind15
Udgave nummer8
Sider (fra-til)3719-3730
ISSN1994-0416
DOI
StatusUdgivet - 2021

Bibliografisk note

Funding Information:
EGRIP is directed and organized by the Centre for Ice and Climate at the Niels Bohr Institute, University of Copenhagen. It is supported by funding agencies and institutions in Denmark (A. P. Møller Foundation, University of Copenhagen), USA (US National Science Foundation, Office of Polar Programs), Germany (Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research), Japan (National Institute of Polar Research and Arctic Challenge for Sustainability), Norway (University of Bergen and Trond Mohn Foundation), Switzerland (Swiss National Science Foundation), France (French Polar Institute Paul-Emile Victor, Institute for Geosciences and Environmental research), Canada (University of Manitoba) and China (Chinese Academy of Sciences and Beijing Normal University).

Funding Information:
Financial support. This research has been supported by the Alfred

Funding Information:
The research leading to these results has received funding from the European Research Council under the European Community’s Seventh Framework programme, (FP7/2007-2013)/ERC grant agreement no. 610055 as part of the ice2ice project, and from the European Union’s Horizon 2020 Research and Innovation programme, under grant agreement no. 820970 as part of the TiPES project. This paper is TiPES publication no. 49. Additional support was received from the Villum Investigator Project IceFlow (grant no. 16572).

Publisher Copyright:
© 2021 Helle Astrid Kjær et al.

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