Advisor: Dr. Melissa Lafrenière
My research objective is to couple dissolved organic matter biogeochemistry with microbial data to better understand how permafrost thaw and disturbance alters carbon cycling dynamics. Greenhouse gas production from thawed permafrost carbon is known to be controlled by the organic carbon composition, the microbial community structure, and their response to thaw. However, due to their complexity these mechanisms remain poorly understood. This research aims to improve understanding of how these mechanisms affect greenhouse gas production in the Canadian High Arctic, with implications towards better understanding circumpolar permafrost carbon cycling.
Keywords: Biogeochemistry, carbon, organic matter, soil, microbiology
Advisor: Dr. Scott Lamoureux
The overall goal of my research is to understand and quantitatively determine how the Arctic and Alpine environments have responded and currently respond to climate variability. This remains the cornerstone to assess how these highly sensitive environments will evolve with future climate change. To target this goal, I am greatly interested in the study of varved lake sediments (annual deposits) from the Canadian High Arctic and the European Alps.
Keywords: Climate change, lake sediments, varve-sedimentology, limnogeology, paleoclimatology
My research aims to better understand the impact of the Arctic warming and permafrost degradation on the carbon cycle in soils and rivers. At Queen’s University as part of the ADAPT project, I work on assessing the amount and the optical properties of the dissolved organic matter that will become available to microbial activity and export with permafrost degradation. This study intends to provide the first wide picture of the composition of the organic compounds stored in the Canadian permafrost.
Key words: Canadian Arctic, Permafrost Carbon Feedback, Dissolved Organic Matter, Absorbance and Fluorescence, PARAFAC
Advisor: Dr. Scott Lamoureux
My Post-Doctoral Fellowship utilizes skills obtained during my PhD to examine the broad scale impacts of permafrost hazards, and the landscape controls associated with their development at a regional scale for the Northwest Territories. Climate change continues to be a serious concern and challenge for communities and infrastructure development in the Canadian Arctic. Of particular concern are hazards associated with permafrost degradation, changing water quality and the stability and maintenance of transport routes and industrial infrastructure. Through this research I aim to make a vital contribution that will help inform planning and policy development in order to facilitate mitigation and adaptation to climate change.
Advisor: Dr. Myrna Simpson
Jun-Jian is currently a postdoc in Professor Myrna Simpson’s group. He is interested in organic matter biogeochemistry in the context of natural and anthropogenic disturbances.