Beaded streams: A case study in the Blackstone Uplands, Yukon Canada.

2018-01-14T05:19:58Z (GMT) by Emma Ciric Pascale Roy-léveillée
Ciric, E, Roy-Leveillee, P (2017) Beaded Streams: A case study in the Blackstone Uplands, Yukon, Canada. Canadian Association of Geographers 2017: Towards a Just and Sustainable World, May 29-June2, 2017, Toronto, ON.


Abstract:
Beaded streams are a type of thermokarst expression resulting from ice wedge degradation found on gently
sloping terrain. They have been studied in Arctic ecosystems underlain by continuous permafrost. This research
examined beaded streams in the Blackstone Uplands (YT), a sub-arctic tundra landscape of the discontinuous
permafrost zone. Analysis of beaded streams on satellite imagery and aerial photography taken in the 1950s
indicated that beaded stream development is closely linked to the degradation of ice wedge polygon networks,
and results in can result in pronounced changes in vegetation cover as beaded streams mature. In July 2016, a
beaded stream from this study area was visited in the field to determine its depth as well as physical observations.