Audrey Veillette presents: Stabilisation post-dégradation et modification à long terme du pergélisol

February 19, 2016 in Conference, post

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Me and my poster at the Center for Northern Studies annual colloquium. Photo credit : Daniel Fortier

It is at the annual colloquium of the Center for Northern Studies (CNS), that took place in Trois-Rivières, that I presented for the first time the preliminary results of my masters’ research to a scientific public! My poster focuses on the morphological traits of a stabilized permafrost following perturbation by thermo erosion. On Bylot Island, many thermo erosion gullies incise the studied valley; the gullies remain in the landscape once stabilized, after a few decades. This stabilization generates new characteristics for surface permafrost; hence it is important to understand better the new state of permafrost. Preliminary results indicate an increased presence of ice if the upper permafrost, which modifies the quantity of latent heat in the soil, having effects on its thermal stability! For the next few weeks, I will be working in the lab to quantify this latent heat.

During the colloquim, I also had the chance to discuss about thermo erosion with the passionate François Costard, as well as learn about a variety of ongoing Nordic research work. Thanks to the CNS 🙂

 

PosterCEN_AV2016-96dpi

 

Talk of Gautier Davesne at the annual meeting of the Centre for Northern Studies!

February 18, 2016 in Conference, post

Gautier Davesne presented some results of his M.Sc. researches at the annual meeting of the Centre for Northern Studies on Thursday 11th February. Its presentation, entitled « The thermal regime of mountain permafrost at the summit of Mont Jacques Cartier in the Gaspé Peninsula, Québec, Canada: a 37-year record showing an overall warming trend », showed that mountain permafrost at the Mont Jacques-Cartier summit responded very quickly to the warming of the air temperature since the end of 1970s. Its internal temperature is presently close to the melting point. The disappearance of the permafrost body is expected to occur around 2040 if the warming trend continue in the future, inducing major impacts on the local alpine geosystem.

Présentation PowerPoint

Evolution (5-year running mean to filter inter-annual variability) of the modelled mean annual air temperature (MAAT) and measured mean ground annual temperature (MAGT) at the Mont Jacques-Cartier summit.

Audrey Veillette recently joined the CEN!

March 25, 2015 in post

Audrey Veillette is a M.Sc. candidate since January 2015 and is now a member of the Centre for Northern Studies (CEN) (see her profile page here!). Her master’s project focuses on the cryostratigraphy of thermo-erosion gullies on Bylot Island and aims to quantify the impact of gullies on energy and material flow within the geosystems. Audrey will focus her attention on the stabilization characteristics of gullies through cryostratigraphic analysis.

Massive ice drilling, Bylot Island (Nunavut) in the summer of 2013. Étienne Godin and Audrey Veillette.