Nordicana D52 / DOI : 10.5885/45603CE-21852993EE434926

Organic matter content and grain size distribution in lake sediment cores, Bylot Island, Nunavut, Canada.

Daniel Fortier^{1, 3}, Frédéric Bouchard^{2, 3}, Zhaoyi Zhang^{1, 3}, Stéphanie Coulombe^{1, 3}
¹Département de géographie, Université de Montréal
²Géosciences Paris Sud (GEOPS), Université Paris Saclay
³Centre d'études nordiques (CEN)

Abstract

This dataset presents an estimation of the organic matter content (by loss-on-ignition) and particle size (grain size analysis) in two lake sediment cores (109 cm, 114 cm) from two different lakes located on Bylot Island, Nunavut, Canada. The cores were collected in June 2015 at « Gull Lake » (also named BYL-66 in other publications) and lake K (also named BYL-36) from the still-present ice cover with a 7 cm-diameter percussion corer (Aquatic Research Instruments). First, samples were collected at each cm along the cores, then freeze-dried and combusted (550 °C for 4 h) to remove the organic fraction. Second, a part of these samples was grouped into stratigraphic sub-units based on visual descriptions of the core. These samples were analyzed for their grain size distribution, either by sieving for coarser material (sand, gravel), or by hydrometry for finer sediment (clay, silt). For lake K, the finer fraction of the subsamples were analyzed by laser diffraction.

Data citation

Fortier, D., Bouchard, F., Zhang Z., Coulombe,S. 2021. Organic matter content and grain size distribution in lake sediment cores, Bylot Island, Nunavut, Canada., v. 1.1 (2015-2015). Nordicana D52, doi: 10.5885/45603CE-21852993EE434926.

Location map

Key references

Bouchard, F., Fortier, D., Paquette, M., Boucher, V., Pienitz, R., and Laurion, I.: Thermokarst lake inception and development in syngenetic ice-wedge polygon terrain during a cooling climatic trend, Bylot Island (Nunavut), eastern Canadian Arctic, The Cryosphere, 14, 2607–2627, https://doi.org/10.5194/tc-14-2607-2020, 2020. DOI: 10.5194/tc-14-2607-2020.

Contributors

Pienitz, Reinhard (Département de géographie, Université Laval & Centre d'études nordiques (CEN))

Laurion, Isabelle (Centre Eau Terre Environnement, Institut national de la recherche scientifique (INRS-ETE) & Centre d'études nordiques (CEN))

Acknowledgements

Audrey Veillette (U. Montréal), Vilmantas Preskienis (INRS-ETE) and Maxime Tremblay (UQTR) collected the sediment core in the field. Arianne Lafontaine and Andréanne Lemay (U. Montréal) conducted laboratory work for grain size analysis of the sediments (sieving and hydrometry).