Nora Casson


Nora Casson Title: Associate Professor, Canada Research Chair in Environmental Influences on Water Quality
Office: 2RC022
Building: Richardson College for the Environment
Phone: (204) 258-3052

Teaching Areas:
Catchment hydrology
Ecosystem ecology


GEOG-2218(3) Fluvial and Slope Processes
GEOG-3210(3) Hydrology
GEOG-3218(3) Global BioGeochemical Cycles
GEOG-3330(3) Research Methods in Geography

Research Interests:

Hydrological controls on stream nutrient export.
Landscape controls on stream and lake chemistry.
Interactions between hydrological and biogeochemical processes across ecosystems.


Orihel, D. M., H. M. Baulch, N. J. Casson, R. L. North, C. T. Parsons, D. C. Seckar, and J. J. Venkiteswaran, J. J. 2017. Internal phosphorus loading in Canadian fresh waters: a critical review and data analysisCanadian Journal of Fisheries and Aquatic Sciences 74(12): 2005–2029.

Enanga, E. M., N.J. Casson, T. Fairweather, and I. F. Creed. 2017. Nitrous oxide and dinitrogen: The missing flux in nitrogen budgets of forested catchments? Environmental Science and Technology 51(11): 6036–6043.

Crossman, J., M. C. Eimers, N. J. Casson, D. A. Burns, J. L. Campbell, G. E. Likens, M. J. Mitchell, S. J. Nelson, J. B. Shanley, S. A. Watmough, and K. L. Webster. 2016. Regional meteorological drivers and long term trends on winter-spring nitrate dynamics across watersheds in northeastern North America. Biogeochemistry 130(3): 247–265.

Enanga, E. M., I. F. Creed, T. Fairweather, and N. J. Casson. 2016. Snow covered soils produce N2O that is lost from forested catchments prior to snowmelt. Journal of Geophysical Research – Biogeosciences 121: 2356–2368

Stanley, E. H., N. J. Casson, S. T. Christel, J. T. Crawford, L. C. Loken, and S. K. Oliver. 2016. The ecology of methane in streams and rivers: patterns, controls, and global significance. Ecological Monographs 86(2): 146–171.

Enanga, E. M., I. F. Creed, N. J. Casson, and F. D. Beall. 2016. Summer storms trigger soil N2O efflux episodes in forested catchments. Journal of Geophysical Research – Biogeosciences 121: 95-108.

Crawford, J. T., L. C. Loken, N. J. Casson, C. Smith, A. G. Stone, and L. A. Winslow.  2015. High-speed limnology: Using advanced sensors to investigate spatial variability in biogeochemistry and hydrology. Environmental Science and Technology 49(1): 442–450.

Casson, N. J., M. C. Eimers, and S. A. Watmough. 2014. Controls on soil nitrification and stream nitrate export at two forested catchments. Biogeochemistry 121(2): 355–368.

Casson, N. J., M. C. Eimers, and S. A. Watmough. 2014. Sources of nitrate export during rain-on-snow events at forested catchments. Biogeochemistry 120(1-3): 23–36.

O'Brien H. D., M. C. Eimers, S. A. Watmough and N. J. Casson. 2013. Spatial and temporal patterns in total phosphorus in south-central Ontario streams: The role of wetlands and past disturbance. Canadian Journal of Fisheries and Aquatic Sciences 70(5): 766-774, doi:10.1139/cjfas-2012-0474.

Casson, N. J., M. C. Eimers, and S. A. Watmough. 2012. Impact of winter warming on the timing of nutrient export from forested catchments. Hydrological Processes 26: 2546–2554.

Casson, N. J., M. C. Eimers and S. A. Watmough. 2012. An assessment of the nutrient status of sugar maple in Ontario: Indications of phosphorus limitationEnvironmental Monitoring and Assessment 184(10): 5917–5927.

Casson, N. J., M. C. Eimers and J. M. Buttle. 2010. The contribution of rain-on-snow events to nitrate export in the forested landscape of south-central Ontario, CanadaHydrological Processes 24: 1985-1993.