| Title | Les archives paléo-hydrologiques de Grand Lake, Labrador |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Fortin, D; Francus, P |
| Source | Utilisation des archives naturelles pour la reconstitution du passé hydro-climatique; by Bégin, C; Nicault, A; Bégin, Y; Geological Survey of Canada, Open File 8768, 2021 p. 188-193, https://doi.org/10.4095/328093  Open Access |
| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | French |
| Media | on-line; digital |
| Related | This publication is contained in Utilisation des archives
naturelles pour la reconstitution du passé hydro-climatique |
| File format | pdf |
| Province | Newfoundland and Labrador |
| NTS | 13F/07; 13F/08; 13F/09; 13F/10 |
| Area | Grand Lake; Labrador; Sheshatshiu; North West River |
| Lat/Long WENS | -61.0000 -60.0000 53.7500 53.2500 |
| Subjects | environmental geology; hydrogeology; surficial geology/geomorphology; stratigraphy; Nature and Environment; Science and Technology; surface waters; lakes; lake sediment cores; lake sediment thickness;
varves; laminations; climatology; paleoclimatology; hydrologic environment; runoff; paleoenvironment; floods; snow; Le projet ARCHIVES; lacustrine sediments; Climate change; Hydrology; Boreal ecosystems; Forests; Trees; Phanerozoic; Cenozoic;
Quaternary |
| Illustrations | photographs; time series |
| Program | Climate
Change Geoscience Extreme Events |
| Released | 2021 06 28 |
| Abstract | Sediments accumulated at the bottom of Grand Lake, located near the communities of North West River and the Innu First Nation of Sheshatshiu, Labrador, constitute an exceptional paleo-environmental
archive. Their thin annual layers (varves) were analyzed in a manner similar to the annual growth rings of trees. The varves are formed due to the great depth of the lake (> 200 meters) and the large quantity of fine particles carried by its main
tributary during flood periods. Analysis of sediments collected from various locations on the lake-bottom indicates that the varve thickness has declined over the past 150 years and that the interannual variability of floods has also decreased
considerably during this period. We attribute these changes to a decrease in snow cover and in the intensity of the spring melt during the study period. |
| GEOSCAN ID | 328093 |
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