Dissolved methane, carbon dioxide and limnological data from subarctic rivers, northern Québec, Canada

Subarctic rivers of northern Québec (Nunavik, Canada) unveil a potential pathway for waterborne release of greenhouse gases generated through mobilization of organic matter in the large ambient reservoir of permafrost carbon (see e.g. Nordicana D48). In the warming Arctic, this contribution may substantially alter the current parameterization of global carbon balance and the corresponding climate feedbacks. This Nordicana D archive presents the concentrations of dissolved greenhouse gases (methane, carbon dioxide, and nitrous oxide) that were measured in water sampled in the Great Whale River (GWR), Sasapimakwananisikw (SAS) River, the Sheldrake River, and their major tributaries, in summer and winter (GWR). Additional data are presented for dissolved oxygen concentration, temperature, pH, salinity, turbidity, and conductivity. The concentrations of the dissolved greenhouse gases were determined by (1) gas chromatography of gas samples extracted by headspace equilibration in a 2L flask (details in Matveev et al 2019), and (2) direct measurement with methane and carbon dioxide profilers (METS) by Franatech GmbH (details in Matveev et al 2018). The water column values of dissolved oxygen concentration, temperature, pH, salinity, turbidity and conductivity were determined with either Hydrolab DS5, RBR Concerto, and/or YSI EXO2 profilers.

Fonseca Coelho, Lígia (MIT Portugal, Bioengineering)

Gonzalez Moguel, Regina (McGill University, Earth and Planetary Sciences)

Vieira, Gonçalo (CEN & Centro de Estudos Geográficos, IGOT - Universidade de Lisboa)

Freitas, Pedro (Centro de Estudos Geográficos, IGOT - Universidade de Lisboa)

Bansept, Marc-Antoine (Université Laval, Department of Biochemistry, Microbiology and Bioinformatics)

Nordicana D4 - Données des stations climatiques de la région de Whapmagoostui-Kuujjuarapik au Nunavik, Québec, Canada / Climate station data from Whapmagoostui-Kuujjuarapik Region in Nunavik, Quebec, Canada

Nordicana D9 - Données des stations climatiques d'Umiujaq au Nunavik, Québec, Canada / Climate station data from the Umiujaq region in Nunavik, Quebec, Canada

Nordicana D48 - Concentrations de méthane, de dioxyde de carbone et d’oxygène dans des mares de thermokarst des tourbières à palses du nord du Québec, Canada / Concentrations of dissolved methane, carbon dioxide and oxygen in thermokarst lakes and ponds in palsa peatlands, northern Québec, Canada

Nordicana D92 - Données limnologiques et de pigments de l’eau de surface de la Grande Rivière de la Baleine et eaux environnantes. / Limnological and pigment data from the Great Whale River and surrounding surface waters.

Nordicana D125 - Données limnologiques et de pigments de la colonne d’eau sous la glace de la Grande Rivière de la Baleine et sa plume sur la baie d’Hudson. / Winter under-ice limnological and pigment data of the Great Whale River and its freshwater plume into Hudson Bay.

Published

Version 1.1.0 (2019-2019) - Updated January 22, 2024

Version 1.0 (2019-2019) - Updated October 5, 2020