Julien Laliberté, PhD

Oceanographer, Physical Sciences

Remote sensing of oceanic and coastal marine environments

Current research and/or projects

I use satellite remote sensing of oceans and coastal waters as a mean to monitor the marine ecosystem. I am interested in the propagation of sunlight into the atmosphere-snow-ice-ocean system. I have also developped a particular interest for remote sensing, hydrological optics and field sampling. Since 2015, I work for the Department of Fisheries and Oceans Canada where I seek to reinforce our knowledge of phytoplankton temporal and spatial variability in the Estuary and Gulf of St. Lawrence using ocean color remote sensing.

Research and/or project statements

I derive a chlorophyll-a satellite product based on an extensive database of in situ data for the Estuary and Gulf of the St. Lawrence.

Professional activities / interests

Key publications

Stroeve, J.C., Veyssiere, G., Nab, C., Light, B., Perovich, D., Laliberté, J., Campbell K., Landy J., Mallett R., Barrett A., Liston, G.E., Haddon A., and Wilkinson, J. (2024). Mapping potential timing of ice algal blooms from satellite. Geophysical Research Letters, 51, e2023GL106486. https://doi.org/10.1029/2023GL106486.
Mukherjee, S., Hedley, J., Fichot, C., Laliberté, J. and Bélanger, S. (2023). Optical closure in highly absorptive coastal waters: significance of inelastic scattering processes. Optics Express, 31(21), 35178. https://doi.org/10.1364/OE.501732.
Laliberté, J. and Larouche, P. (2023). Chlorophyll-a concentration climatology, phenology, and trends in the optically complex waters of the St. Lawrence Estuary and Gulf. Journal of Marine Systems, 238, 103830, https://doi.org/10.1016/j.jmarsys.2022.103830.
Ardyna, M., Hamilton, D., Harmel, T., Lacour, L., Bernstein, D., Laliberté, J., Horvat, C., Laxenaire, R., Mills, M., van Dijken, G., Polyakov, I., Claustre, H., Mahowald, N., and Arrigo, K. (2022). Wildfire aerosol deposition likely amplified a summertime Arctic phytoplankton bloom. Nature - Communications Earth & Environment 3, 201. https://doi.org/10.1038/s43247-022-00511-9.
Laliberté, J., Rehm, E., Hamre, B., Goyens, C., Perovich, D.K., and Babin, M. (2022). A method to derive satellite PAR albedo time series over first-year sea ice in the Arctic Ocean. Elementa: Science of the Anthropocene 10(1). https://doi.org/10.1525/elementa.2020.00080.
Laliberté, J., Bélanger, S. and Babin, M. (2021). Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere. Elementa: Science of the Anthropocene 9(1). https://doi.org/10.1525/elementa.2020.00083.
Massicotte et al. (2020). Green Edge ice camp campaigns: understanding the processes controlling the under-ice Arctic phytoplankton spring bloom. Earth System Science Data, 12: 151–176. https://doi.org/10.5194/essd-12-151-2020.
Laliberté, J., Larouche, P., Devred, E. and Craig, S. (2018). Chlorophyll-a Concentration Retrieval in the Optically Complex Waters of the St. Lawrence Estuary and Gulf Using Principal Component Analysis. Remote Sensing, 10(2), 265. https://doi.org/10.3390/rs10020265.
Laliberté, J., Bélanger, S. and Frouin R. (2016). Evaluation of satellite-based algorithms to estimate photosynthetically available radiation (PAR) reaching the ocean surface at high northern latitudes. Remote Sensing of Environment. 184: 199-211, https://doi.org/10.1016/j.rse.2016.06.014.