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TitleReconstitutions hydroclimatiques basées sur les séries dendroisotopiques
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBégin, C; Savard, M MORCID logo; Marion, J; Nicault, A; Gingras, M
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. 143-151, 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
NTS22M; 22N; 22O; 23B; 23C; 32D; 23E; 23F; 23G; 23J; 23K; 23L; 32M; 32N; 32O; 32P; 33A; 33B; 33C; 33D; 33E; 33F; 33G; 33H; 33I; 33J; 33K; 33L
AreaComplexe La Grande; Nitchequon; Schefferville; Rivière Caniapiscau; Labrador; Wabush Lake; Ashuanipi River; Churchill River
Lat/Long WENS -79.5000 -66.0000 55.0000 51.0000
Subjectsenvironmental geology; hydrogeology; geochemistry; Nature and Environment; Science and Technology; Recent; climatology; paleoclimatology; dendrochronology; stable isotope studies; carbon isotopes; oxygen isotopes; watersheds; hydrologic environment; meteorology; temperature; precipitation; statistical analyses; correlations; surface waters; rivers; discharge rates; Le projet ARCHIVES; 1815 Tambora Volcanic Eruption; Climate change; Hydrology; Boreal ecosystems; Forests; Wood; Biology; Environmental indicators; Phanerozoic; Cenozoic; Quaternary
Illustrationstime series; plots; bar graphs; photographs
ProgramClimate Change Geoscience Extreme Events
Released2021 06 28
AbstractThe close relationship between stable carbon and oxygen isotopes in growth rings of black spruce trees and regional climatic conditions allows us to reconstruct over the last two centuries, two hydroclimatic parameters providing the best statistical correlation with isotopic values, namely the maximum summer temperature (June-August Tmax) and the summer discharge (July to November) of major regional rivers. The reconstructed 200 years series shows contrasting conditions marked by alternating climatic ambiances typically associated with Quebec boreal summers, where warm and dry conditions alternate with cold and wet periods. The series also documents specific climate events such as the cooling that followed the Tambora eruption in 1815. The reconstructed hydroclimatic series were then validated by comparing them to long datasets measured at larger scale, and to other series reconstructed from independent proxies. Results from this analysis suggest that mid and long-term hydroclimatic variations of the central part of the Quebec-Labrador peninsula, as reconstructed from dendroisotopes, were not only controlled by northern Québec climate systems, but also by major weather systems controlling the level of rivers of northeastern North America.

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