untitledDaniel Lamhonwah

Supervisors: Dr. Scott Lamoureux and Dr. Melissa Lafrenière

As a cold regions hydrologist, I am interested in how climate change impacts on the permafrost environment (i.e. deep ground thaw, slope disturbances, and permafrost degradation) will alter the surface and subsurface flowpaths of water, and the quality of water in streams and rivers. How, where and when water flows are key controls to the mobilization of solutes, nutrients and sediments in an Arctic watershed. My work involves a variety of field and analytical methods including frozen soil core drilling, discharge monitoring, sampling of surface water, precipitation and ground water, and stable isotope ratio and ion concentration analyses. My main study site is Cape Bounty, Melville Island, NU, however my collaborative research with ADAPT (Arctic Development and Adaptation to Permafrost in Transition) has given me the opportunity to partner with several laboratories in Canada and work with permafrost samples from across the Canadian Arctic.

Nanfeng Liunanfeng

Supervisor: Dr. Paul Treitz

My research focuses on remote sensing of biophysical variables for arctic tundra environments. My study areas includes the Cape Bounty Arctic Watershed Observatory (CBAWO), Melville Island, NU and the Apex River Watershed (ARW), Baffin Island, NU (near Iqaluit). Specifically, I am focused on modelling PVC (Percent Vegetation Cover) and fPAR (the fraction of absorbed Photosynthetically Active Radiation) across these two contrasting sites using satellite vegetation indices. I am also developing field methods designed to collect rapid estimates of PVC (using field-based digital infrared photography) and seasonal measures of fPAR for different vegetation communities at these two study sites. This research will provide insight into the temporal and spatial variability of these biophysical variables for arctic vegetation types across an arctic latitudinal gradient.

14333192_10210816768842228_1481656819066853226_nCasey Beel apple-touch-icon-180x180

Supervisors: Dr. Scott Lamoureux and Dr. John Orwin

The aim of my research is to better understand Arctic landscape evolution through an improved understanding of suspended sediment transfer dynamics. In particular, I am interested in the downstream geomorphic response and recovery processes following recent permafrost disturbances in the Canadian High Arctic. To address this goal, my research evaluates sediment mobilization, storage, and transport processes, specifically in regard to hillslope-to-channel connectivity. I am also focused on improving our understanding of how inexpensive turbidimeters can be used to obtain higher-resolution, continuous records of suspended sediment concentrations. The outcome of this research will develop a conceptual framework to understand sediment delivery processes in this region of the Arctic, and provide quantitative baselines for evaluating future change across the Arctic.

apple-touch-icon-180x180Nanor Momejian

Supervisor: Dr. Melissa Lafrenière

My research will try to numerically model the seasonal change in Dissolved Organic Carbon (DOC) flux in surface runoff in high arctic watersheds. My goal is to develop a numerical approach in modeling this change to help understand impacts of climate change on permafrost environments. I will run the numerical model of the studied water on SWAT (Soil and Water Assessment Tool), which has proven to present hydrological and biogeochemical systems per HRU (Hydrological Response Units). The numerical model will be applied for the West River at Cape Bounty Arctic Watershed Observatory (CBAWO), with the aim to develop a tool/method that is appropriate for modeling the hydrology and the biogeochemistry of other high-arctic watersheds.

davidDavid Grewer

Supervisor: Dr. Myrna Simpson

My thesis focuses on the West catchment of the Cape Bounty Arctic Watershed Observatory where widespread active layer detachments occurred in 2007-2008. Through the molecular-level characterization of soil and sedimentary organic matter his work aims to reveal compositional shifts attributed to the disturbances.