The importance of freeze–thaw cycles for lateral tracer transport in ice-wedge polygons

Abstract A significant portion of the Arctic coastal plain is classified as polygonal tundra and plays a vital role in soil carbon cycling. Recent research suggests that lateral transport of dissolved carbon could exceed vertical carbon releases to the atmosphere. However, the details of lateral subsurface flow in polygonal tundra have not been well studied. We incorporated a subsurface transport process into an existing state-of-the-art hydrothermal model. The model captures the physical effects of freeze–thaw cycles on lateral flow in polygonal tundra. The new modeling capability enables non-reactive tracer movement within subsurface. We utilized this new capability to investigate the impact of freeze–thaw cycles on lateral flow in the polygonal tundra. Our study indicates the important role of freeze–thaw cycles and the freeze-up effect in lateral tracer transport, suggesting that dissolved species could be transported from the middle of the polygon to the sides within a couple of thaw seasons. Introducing lateral carbon transport into the climate models could substantially reduce the uncertainty associated with the impact of thawing permafrost.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
The importance of freeze–thaw cycles for lateral tracer transport in ice-wedge polygons ; volume:16 ; number:3 ; year:2022 ; pages:851-862 ; extent:12
The Cryosphere ; 16, Heft 3 (2022), 851-862 (gesamt 12)

Creator
Jafarov, Elchin E.
Svyatsky, Daniil
Newman, Brent
Harp, Dylan
Moulton, David
Wilson, Cathy

DOI
10.5194/tc-16-851-2022
URN
urn:nbn:de:101:1-2022031704292392148250
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:38 AM CEST

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Associated

  • Jafarov, Elchin E.
  • Svyatsky, Daniil
  • Newman, Brent
  • Harp, Dylan
  • Moulton, David
  • Wilson, Cathy

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