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THAW 2014

THAW header

THermokarst Aquatic ecosystems Workshop: Freshwater ecosystems in changing permafrost landscapes will be held in Quebec City 12-15 March 2014.

PAGE21 related researchers present their science both in poster and oral presentations.


Afternoon/ evening People arrive 
17h00-19h00 Icebreaker - Observatoire de la Capitale, 1037 De La Chevrotière, Québec, QC G1R 5E9

THURSDAY 13 March - DAY 1

8h30-9h30 Theme 1 Plenary / Guido Grosse: Thermokarst lake dynamics - A review
10h00-12h00 Oral presentations

10h00 Walter Anthony, K. - Methane emissions from 50 years of thermokarst in Alaskan lakes

10h15 Fedorova, I. - Vulnerability of polar lakes according to investigation of Yamal Peninsula, the Lena River delta, and East Antarctica oases

10h30 Johansson, E. - Water balance and hydrological interactions between catchment, lake and talik in a periglacial landscape

10h45 Kirpotin, S. - Western Siberian peatlands as indicator and regulator of climatic changes on global scale

11h00 Lamoureux, S. - Erosion and downstream transport of sediment from permafrost slope disturbances: recovery times and biogeochemical implications

11h15 Wrona, F. - Effects of a changing cryosphere on the hydrology, geochemistry and ecology of Western Arctic tundra lakes

11h30 Kouarev, A. - Hydrology of permafrost-affected Siberian wetlands from satellite and in-situ observations

11h45 Liljedahl, A.K. - Observed pan-Arctic ice wedge degradation in continuous permafrost and modeled effects on watershed-scale hydrology
13h00-14h00 Theme 2 Plenary / Breck Bowden: Interactions among biogeochemistry, hydrology, and stream ecology in permafrost-dominated Arctic watersheds
14h00-15h00 Oral presentations

14h00  Amyot, M. - Thaw ponds as sites of methyl Hg accumulation and photodemethylation in eastern Canada

14h15  Buell, M-C. - Quantifying carbon emissions from tundra ponds and identifying their role in the tundra carbon cycle

14h30  Canário, J. - Thermokarst lakes as potential sources of contaminants to Subarctic aquatic ecosystems

14h45  Gooseff, M. - Implications to aquatic ecosystems from thermokarst on previously stable stream banks in Taylor Valley, Antarctica
15h30 Elevator speeches* - 2 minutes presentations of certain posters
16h30-19h00 Poster session - In the cafeteria in the adjacent building, Pavillon Abitibi-Price
Following PAGE21 researchers will present a poster:

FRIDAY 14 March - DAY 2

8h30-9h30 Theme 3 Plenary / Jan Karlsson: Food web dynamics and biomass production in lakes at high latitudes: effects of climate change and permafrost thawing?
10h00-12h00 Oral presentations

10h00 Hobbie, J. - No significant warming trend has been detected at the Alaska LTER site since 1989 but ecological effects are obvious

10h15 Crump,B. - Microbial diversity in Arctic freshwaters overlying permafrost is structured by inoculation of microbes from soils

10h30 Comte, J. - Bacterial biogeographic patterns in permafrost thaw ponds and implications for greenhouse gas emissions

10h45 Kohler, T. - Nutrient availability influences microbial mat biomass and elemental composition in Taylor Valley, Antarctica

11h00 Lento, J. - Impacts of permafrost slump activity on stream benthic macroinvertebrate communities

11h15 Steven, B. - Response of High Arctic soil bacteria to intermittent water pulses in permafrost water tracks

11h30 Cory, R.M. - The fate of carbon draining permafrost soils is controlled by photochemical reactions in addition to microbial degradation in arctic surface waters

SATURDAY 15 March- DAY 3

8h30-9h30 Oral presentations

8h30 MacIntyre, S. - Comparative physical limnology of Arctic lakes: implications for fluxes of greenhouse gases

8h45 Turner, K. - Characterizing the past and present hydrology of a lake-rich thermokarst landscape (Old Crow Flats, Yukon) and its relations to climate and land-cover

9h15 Fortier, D. - Morphometry and evolution of thermal erosion gullies in the valley of the glacier C-79, Bylot Island, Canadian Arctic archipelago
10h00-12h00 Discussion groups block 2

Wrap-up discussions from 3 rapporteurs
14h00-14h30 Closing remarks
* An ELEVATOR SPEECH is a short summary used to quickly and simply define your research and its significance. Researchers are asked to summarize their poster by speaking for up to 2 minutes and showing 2 slides