Department of Earth & Planetary Sciences
3450 University St.
Canada H3A 0E8
Email: bjorn.sundby [at] mcgill.ca
Early diagenesis of sediments in environments ranging from salt marshes to the deep basins in the Arctic Ocean. Dr. Sundby's research focuses on redox chemistry but is relevant to any element whose distribution in sediments is in some way related to the carbon cycle. Their include major elements such as Fe and Mn, nutrient elements such as N, P, and Si, and trace elements such as Cd, Mo, U, and Re. The interactions between living oranisms (bacteria, animals and plants) and sediments receive special attention. Recent and ongoing projects include the use of a solid state voltametric microelectrode to measure redox species directly in sediment porewater; recent changes in sediment chemistry in the deep Arctic Ocean basins as a result of global warming; the cycle of lead in the root zone of salt marsh sediments; the coupled geochemistry of Mn, N and I in sediments; geochemistry of Mo, Cd, U and Re in view of their use as paleo redox-tracers.
Luther III, G.W., Madison, A.S., Mucci, A., Sundby, B., and Oldham, V.B., (2015). A kinetic approach to assess the strengths of ligands bound to soluble Mn(III). Marine Chemistry, 173, 93-99.
Sundby, B., Lecroart, P., Anschutz, P., Katsev, S., and Mucci, A., (2015). When deep diagenesis in Arctic Ocean sediments compromises manganese-based geochronology. Marine Geology, 366, 62-68.
Madison, A.S., Tebo, B.M., Mucci, A., Sundby, B., and Luther III, G.W., (2013). Abundant porewater Mn(III) is a major component of the sedimentary redox system. Science, 341, 875-878.
Richard, D., Sundby, B., and Mucci, A., (2013). Kinetics of manganese adsorption, desorption, and oxidation in coastal marine sediments. Limnology and Oceanography, 58(3), 987-996, doi: 10.4319/lo.2013.58.3.0987.