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TitleReconstitution des apports en eau et influence de la circulation atmosphérique sur la variabilité spatiotemporelle de l'hydrologie
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorNicault, A; Boucher, É; Perreault, L; Guiot, J
SourceUtilisation 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. 162-171, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Utilisation des archives naturelles pour la reconstitution du passé hydro-climatique
File formatpdf
ProvinceQuebec; Newfoundland and Labrador
NTS12M; 13D; 13E; 13L; 13M; 22M; 22N; 22O; 22P; 23; 32M; 32N; 32O; 32P; 33
AreaComplexe La Grande; Rivière Caniapiscau; Churchill Falls; Labrador
Lat/Long WENS -79.5000 -62.0000 55.0000 51.0000
Subjectsenvironmental geology; hydrogeology; Nature and Environment; Science and Technology; Economics and Industry; Recent; climatology; paleoclimatology; hydrologic environment; hydrologic budget; water levels; dendrochronology; modelling; models; meteorology; temperature; precipitation; watersheds; statistical analyses; correlations; energy resources; hydroelectric power; Le projet ARCHIVES; Picea mariana; Atlantic Multidecadal Oscillation; North Atlantic Oscillation; Arctic Oscillation; Methodology; Climate change; Hydrology; Boreal ecosystems; Forests; Trees; Biology; Water supply; Environmental indicators; Phanerozoic; Cenozoic; Quaternary
Illustrationsplots; time series; tables; bar graphs
ProgramClimate Change Geoscience Extreme Events
Released2021 06 28
AbstractThe annual and summer water supplies were reconstructed over the four large catchments, LG2, LG4, Caniaspiscau and Churchill-Falls in Quebec-Labrador, using tree-ring proxies (chronologies of ring widths, maximum density and isotopic ratios delta-13C and delta-18O over the period 1800-2000). These reconstructions have made it possible to highlight important contrasts in terms of hydrological regimes between the east and west of the peninsula and to relay them with atmospheric circulation indices. The variability of water levels in the western region, mainly LG2, is very significantly correlated with the Atlantic Multidecadal Oscillation (AMO) while the variability of the water supplies of the easternmost basins (Churchill-Falls) is strongly correlated with the winter (December, January and February) North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) indices and with 'Pacific' indices such as ENSO over the first part of the 20th century.

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