Articles | Volume 14, issue 12
https://doi.org/10.5194/tc-14-4627-2020
https://doi.org/10.5194/tc-14-4627-2020
Research article
 | 
21 Dec 2020
Research article |  | 21 Dec 2020

Numerical modelling of permafrost spring discharge and open-system pingo formation induced by basal permafrost aggradation

Mikkel Toft Hornum, Andrew Jonathan Hodson, Søren Jessen, Victor Bense, and Kim Senger

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Cited articles

Åhman, R.: Studier av pingoer i Adventdalen och Reindalen på Spetsbergen, Lunds Univ. Naturgeografiska Institution, Rapp. och Not., 15, 27–44, 1973. 
Aitken, A. E. and Gilbert, R.: Holocene Nearshore Environments and Sea-Level History in Pangnirtung Fiord, Baffin Island, N.W.T., Canada, Arctic Alppine Res., 21, 34–44, 1989. 
Andersen, D. T., Pollard, W. H., McKay, C. P., and Heldmann, J.: Cold springs in permafrost on Earth and Mars, J. Geophys. Res.-Planets, 107, 5015, https://doi.org/10.1029/2000je001436, 2002. 
AQUAVEO™: Groundwater Modeling System 10.4.4, available at: https://www.aquaveo.com/software/gms-groundwater-modeling-system-introduction, last access: 1 December 2019. 
Bælum, K., Johansen, T. A., Johnsen, H., Rød, K., Ruud, B. O., and Braathen, A.: Subsurface structures of the Longyearbyen CO2 Lab study area in Central Spitsbergen (Arctic Norway) as mapped by reflection seismic data, Nor. Geol. Tidsskr., 92, 377–389, 2012. 
Short summary
In Arctic fjord valleys, considerable amounts of methane may be stored below the permafrost and escape directly to the atmosphere through springs. A new conceptual model of how such springs form and persist is presented and confirmed by numerical modelling experiments: in uplifted Arctic valleys, freezing pressure induced at the permafrost base can drive the flow of groundwater to the surface through vents in frozen ground. This deserves attention as an emission pathway for greenhouse gasses.