Erika Hille. Ph.D. Student (co-supervised with Dr. Scott Lamoureux)
My research focuses on how landscape, hydrologic, and climatic conditions influence the water quality of Arctic streams and rivers. More specifically, I am examining spatial variability in the seasonal hydrochemistry of four Arctic rivers situated in contrasting permafrost landscapes (coastal tundra, low arctic polygonal, ice glaciated marginal, forested interior plain). Three rivers are located in the Beaufort Delta Region. The fourth is located on Baffin Island, in the Eastern Arctic. This information will be used to develop a conceptual framework that characterizes the sensitivity and response of aquatic systems to permafrost thaw.
In addition to being a PhD student, I work at the Western Arctic Research Centre (WARC) in Inuvik, Northwest Territories. In my role at WARC, I spend a lot of time working with community members, government, Indigenous, and co-management organizations to develop research programs that are relevant to the people of the Beaufort-Delta region. As a vital resource, understanding and mitigating the effects of climate change on freshwater systems is consistently a research priority. It’s my hope that this research can be used by community leaders to make informed decisions about northern freshwater resources.
Cedelle Pereira, M.Sc. Student
My research focuses on understanding how landscape characteristics, permafrost disturbances, and hydrological processes control the transformation and transport of dissolved organic and dissolved inorganic carbon in High Arctic headwater streams.
In addition, my research aims to better comprehend how dissolved organic matter characteristics and composition vary with landscape cover. My work is situated at the Cape Bounty Arctic Watershed Observatory (CBAWO) on Melville Island, Nunavut.
I am hopeful that working at a long-term integrated research facility, will allow me to advance my research and analytical skills in order to provide quantitative information that will facilitate the development of watershed scale models that can be used to evaluate how changes in land cover types, hydrology and permafrost disturbance, influence carbon dynamics in surface waters.
Veronique Landriault, M.Sc. Student (co-supervised with Dr. Chris Omelon)
My research will focus on the impact of permafrost thaw on water quality and aquatic ecosystems in High Arctic rivers, and will try to understand how permafrost-derived nutrients (including carbon, nitrogen, and phosphorous) in lakes and rivers, will impact aquatic food web dynamics and primary productivity in surface waters around Resolute, Nunavut.
With nitrogen and phosphorous being limiting nutrients in these oligotrophic environments, any addition of nutrients from climate-induced permafrost thaw stands to cause shifts in the primary productivity and food webs in these environments.
This research is funded through research grants from ArcticNet and NSERC; and has as its core the aim to engage in collaborations with the community of Resolute Bay to develop baseline water and permafrost data to support local decision-making.
Lee Nguyen, M.Sc. Student
Water quality and availability are critical in determining sources of drinking water. As climate change amplifies warming in the Arctic, surface water sources (rain and snow) and groundwater dynamics in permafrost regions are changing alongside it.
My research aims to identify and characterize potential groundwater fluxes in Iqaluit, Nunavut to better understand these subsurface processes, and how they are likely to impact water quality and seasonality and volume of surface runoff in rivers around Iqaluit.
Undergraduate Student Researchers
Chloe Earnshaw-Osler, BSc.H Student
I am a fourth-year undergraduate student specializing in environmental chemistry. As a result of an NSERC summer USRA award, I was fortunate to work alongside MSc student, Lee Nguyen and in collaboration with student researchers and collaborators at the Nunavut Research Institute, as part of a research project funded by Polar Knowledge Canada, entitles “Partnership for understanding environmental change impacts on water security and water quality in Iqaluit, NU”. My undergraduate thesis research is investigating the dissolved metal concentrations in streams and groundwater in the Niaqunguk (Apex) river watershed. This data will be used to gain an understanding of how the transport of metals is influenced by land cover type and permafrost in this region.
Sydney Campbell, BSc.H. Student
I am a fourth year undergraduate student majoring in Environmental Science, with a minor in Economics. I have recived summer funding under the Queen’s University SWEP program, which is allowing me to conduct field work, investigating the stream discharge and water chemistry in the Mecham, McMaster, and North rivers in Resolute Bay, Nunavut. My goal is to understand how dissolved metal and nutrient quantities change as permafrost thaws and the active layer deepens throughout the summer season across watersheds with a gradient of vegetation cover. This research will provides insights to the relationship between water chemistry, landscape and active layer characteristics. Understanding the chemical relationship between water and landscape characteristics (vegetation cover) is critical for water governance and decision making as vegetation cover, active layer depth and duration evolve with climate change. This research is funded by ArcticNet Network Centres of Excellence, Northern Scientific Training Program (NSTP) and NSERC grants.
Past Postdoctoral Fellows
|2019||Dr. Joanne Heslop||Robert Gilbert PDF||Permafrost thaw and disturbance impacts on dissolved organic matter biogeochemistry and greenhouse gas production|
|2017||Dr. Julien Fouché||Distribution and characteristics of dissolved organic matter in permafrost|
|2013||Dr. Scott Montross||Control of geology and permafrost disturbance on aqueous geochemical signatures and microbial community composition|
|2010||Dr. Ted Lewis||Climatic and permafrost change impacts on fluvial sediment and solute loads|
Past Graduate Students
|2022||Nanor Momejian||Ph.D.||Controls on DOC flux in continuous permafrost watersheds|
Landscape controls on dissolved fluvial carbon concentration across High Arctic headwater streams.
|2021||Karine Rioux||M.Sc.||Abrupt permafrost collapse by thermal erosion enhances carbon and solute exports|
|2020||Daniel Lamhonwah||Ph.D.||Hydrological and hydrochemical responses to thawing permafrost in the Canadian Arctic|
|2019||Matt Gilman||M.Sc.||Subsurface flow delivery to a small High Arctic river|
|2018||Gillian Thiel||M.Sc.||Dissolved organic matter lability in High Arctic pons and soils|
|2016||Elizabeth Kjikjerkovska||M.Sc.||Long-term hydroclimatic change and interannual variability in water sources, Apex River (Iqaluit), Baffin Island, Nunavut.|
|2014||Vivian Wasiuta||Ph.D.||Sulfur and reactive nitrogen deposited in the alpine of the Southern Canadian Rockies: quantification and assessment of the main factors influencing deposition|
|2014||Nicole Louiseize||M.Sc.||Impact of active layer detachments on seasonal dynamics of nitrogen export in High Arctic watersheds|
|2012||Erin Doxsey-Whitfield||M.Sc.||Magnitude and controls of microbial nitrate production in the streams and till of a glaciated alpine catchment, Canadian Rocky Mountains, Alberta|
|2010||Emil Laurin||M.Sc.||The impact of experimental snow augmentation on soil thermal regimes and nutrient fluxes from High Arctic headwater catchments|
|2008||Brock McCleod||M.Sc.||The Influence of Snowcover Distribution and Variable Melt Regimes on the Transport of Nutrients from Two High Arctic Watersheds|
Past Undergraduate Student Researchers
|2021||Roslin Chen||Co-op, U Ottawa||Developing ultrafiltration methods for the size fractionation of dissolved organic matter|
|Sophie Perett||BAH Sheffield UK||Control of surface vegetation cover on dissolved organic matter optical characteristics in High Arctic watersheds|
|Emma Bramley||BAH Durham UK||Long term and seasonal controls on trace metals in an Arctic watershed, Iqaluit NU|
|2020||Madeline Healey||BScH GPHY||Seasonal and landscape controls on inorganic N fluxes in High Arctic watersheds|
|2018||Hannah Boomer||BScH GPHY||Hydrochemical response of Arctic Lakes to climate variability, near Iqaluit NU|
|2016||Bridget Rusk||BScH GPHY||Characterization of the geochemical processes and importance of subsurface water input at the confluence of the Apex River, Iqaluit, NU.|
|Gillian Thiel||BScH ENSC||Investigating seasonal hydrology and its relationship with microbiological indicators in the Apex River watershed (Iqaluit, Nunavut)|
|2015||Katie Burd||BScH GPHY||Examining the source and flux of organic matter in the Apex River, Nunavut|
|Josh Papernick||BScH GPHY||The influence of permafrost disturbances and subsurface water sources on dissolved inorganic nitrogen in High Arctic Watersheds.|
|Luke Steer||BScH ENSC||The effects of seasonality on runoff generation and stream water origin in the Apex River watershed|
|2014||Lily Chan||BAH GPHY||Nitrogen and dissolved organic matter composition in active layer soils affected by permafrost disturbances|
|2013||Krysten Rutherford||BASc||Seasonal hydrology and permafrost disturbance as controls on the composition of dissolved organic matter (DOM) in High Arctic headwater streams|
|2011||Heather Munro||BASc||Impact of active layer detachments on dissolved organic carbon in five High Arctic subcatchments|