by Godin.E

Maxime Tremblay awarded of a EnviroNord scholarship will present his master thesis research project in the community of Pond Inlet

May 27, 2015 in post by Godin.E

Maxime Tremblay, with EnviroNord support, will stay in Pond Inlet from the 26th to the 30th of May to present his master project on the woolly willow on Bylot Island. He will also present his project at the local radio and will hold a stand at the COOP of the village. He will also participate to the science classes at Nasivvik highschool to reach the youth and to expose them his research.

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Glacial lake sediments: nice paleoenvironmental archives.

May 25, 2015 in @en, focus-en by fbouchard

Fig1-map

Figure 1: Location and context around kettle lake ‘BYL36’. The lake, containing sediments dated at 10.8 ka BP, is located just to the north-east (slightly upstream) of a terminal moraine dated at 9.8 ka BP (photos: V. Preskienis [upper] et GeoEye-1 [lower]).

The Holocene history of glacier valleys on Bylot Island, since the last glaciation, has been reconstructed by carefully studying the landscape features. For example, in the valley of glacier C-79 (map, Figure 1), the maximum advance of the glacier was dated at 9860 ± 140 BP (before present), and it was suggested that the glacier front was in contact with shallow marine waters (Allard, 1996). This interpretation is based on mollusc shells found in marine clay and dated using the radiocarbon (14C) technique, which would give a ‘calibrated’ age of 11 440 ± 380 cal BP.

 

During the summer of 2014, Geocryolab members used a novel method of bathymetric mapping in order to characterize the morphology of a glacial lake located in the valley (see other post about the sonar-GPS system). It is a kettle lake, formed by the melting of ground ice buried in soil after glacier retreat, and located near the position of the glacier front mentioned above (Fig1). A > 30-cm long sediment core (Fig2) was collected from the deepest part of the lake (~ 12 m), and 14C dating at the base of these lacustrine sediments gave an age of 10 825 ± 45 BP, or 12 730 ± 50 cal BP once calibrated. The exact nature of these sediments still has to be confirmed, but this shows the great potential of studying sedimentary archives contained in lakes. Which makes our friend ‘Zodiac Sherpa’ (Fig3) very optimistic.

Fig2 Sediment core

Figure 2: Sediment core collected from the deepest part (~ 12 m) of kettle lake ‘BYL36’ (photo: F. Bouchard).

Fig3 Sediment Coring Sherpa

Figure 3 : Motivated young researcher who wisely checks, before jumping to the next coring site with a zodiac on his back, if he has all the equipment he needs. We can see the percussion corer just behind him (photo: V. Preskienis).

 

 

 

 

 

 

 

 

 

 

For further information:

Allard, M. (1996) : Geomorphological changes and permafrost dynamics: Key factors in changing arctic ecosystems. An example from Bylot Island, Nunavut, Canada. Geoscience Canada, 23, 205-212.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

by Kate G.

Geocryolab at the AGU Joint Assembly 2015 in Montreal

May 6, 2015 in @en, post by Kate G.

This week took place in Montreal the Joint Assembly of the AGU-GAC-MAC-CGU.

Daniel Fortier, Etienne Godin and Fred Bouchard presented yesterday a session (oral and poster) entitled Dynamics of Permafrost Regions in a Warming World: Processes, Landforms, Biogeosystems I.

Program

Program of the session “Dynamics of Permafrost Regions in a Warming World: Processes, Landforms, Biogeosystems I”

During this session, Manuel Verpaelst presented his MSc project on Mass Movement by solifluction and Syngenetic Dynamic of Permafrost in the High Arctic, Ward Hunt Island, Canadian High Arctic.

Lyna Lapointe Elmrabti, Sabine Veuille and Katerine Grandmont each presented a poster during the Joint Assembly on the following subjects :

Lyna: Paleoenvironmental records from alaskan Late Pleistocene yedoma permafrost : A case study from the Itkillik river

Sabine: Quantifying Heat Advection by Groundwater Flow in the Active Layer: Laboratory

Katerine: Simulations et Impact of Land Cover Disturbances on Permafrost Landscapes in Yukon, Case Studies.

For more information and the complete notices, consult the full program of the conference HERE.

2015-05-05 17.39.31

Sabine V presenting her porster – AGU Montreal 2015

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Katerine G presenting her poster – AGU Montreal 2015

 

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Etienne G, Sabine V et Manuel V – AGU Montreal 2015

 

Audrey Veillette: Recipient of a NSTP scholarship for the upcoming 2015 field season

May 6, 2015 in post by Davesne.G

Congratulations to Audrey Veillette, who was awarded a Northern Scientific Training Program (NSTP) grant. Audrey will continue his study of the thermo-erosional gullies at Bylot Island from the 20 May 2015.

AVeillette

Audrey on the field at Bylot Island in summer 2013

 

Michel Paquette awarded a PFSN grant for his 2015 summer field work!

May 4, 2015 in post by Davesne.G

Congratulations to Michel Paquette, who was awarded a Northern Scientific Training Program grant for his 2015 summer season field work on Ward Hunt Island. This summer he will look at preferential flowpaths through patterned ground and their effect on nutrient mobilisation, sources and sinks.

We wish you a good 2015 field work Michel!

MPaquette

Michel on the field in Ward Hunt Island (summer 2013)