Comparison of different gas extraction techniques to analyze CH4 and N2O compositions in gas trapped in permafrost ice wedges

Methane (CH4) and nitrous oxide (N2O) compositions in ground ice may provide information on their production mechanisms in permafrost. However, existing gas extraction methods have not been well tested. We tested conventional wet and dry gas extraction methods using ice wedges from Alaska and Siberi...

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Bibliographic Details
Main Authors: Yang, Ji-Woong, Ahn, Jinho, Iwahana, Go, Han, Sangyoung, Kim, Kyungmin, Fedorov, Alexander
Format: Dataset
Language:English
Published: Zenodo 2020
Subjects:
Ground ice
Permafrost
Methane
Nitrous Oxide
Arctic
Ice
permafrost
wedge*
Alaska
Siberia
Online Access:https://dx.doi.org/10.5281/zenodo.3701242
https://zenodo.org/record/3701242
Description
Summary:Methane (CH4) and nitrous oxide (N2O) compositions in ground ice may provide information on their production mechanisms in permafrost. However, existing gas extraction methods have not been well tested. We tested conventional wet and dry gas extraction methods using ice wedges from Alaska and Siberia, finding that both methods can extract gas from the easily extractable parts of the ice (e.g., gas bubbles), and yield similar results for CH4 and N2O mixing ratios. We also found insignificant effects of microbial activity during wet extraction. However, both techniques were unable to fully extract gas from the ground ice, presumably because gas molecules adsorbed onto or enclosed in soil aggregates are not easily extractable. Estimation of gas production in subfreezing environment of permafrost should consider such incomplete gas extraction. : This project was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) (NRF-2018R1A2B3003256 and NRF-2018R1A5A1024958) and the NASA ABoVE (Arctic Boreal and Vulnerability Experiment; grant no. NNX17AC57A). : {"references": ["Yang, J.-W., Ahn, J., Iwahana, G., Han, S., Kim, K., and Fedorov, A.: Brief Communication: The reliability of gas extraction techniques for analysing CH4 and N2O compositions in gas trapped in permafrost ice-wedges, The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-231, in review, 2019."]}

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