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TitleUnderestimation of the Tambora effects in North American taiga ecosystems
AuthorGennaretti, F; Boucher, E; Nicault, A; Gea-Izquierdo, G; Arseneault, D; Berninger, F; Savard, M MORCID logo; Bégin, C; Guiot, J
SourceEnvironmental Research Letters vol. 13, no. 3, 034017, 2018 p. 1-13, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20182303
PublisherIOP Publishing
Mediapaper; on-line; digital
File formatpdf; html
ProvinceQuebec; Newfoundland and Labrador; Ontario; Manitoba
NTS12; 13; 14; 21; 22; 23; 24; 31; 32; 33; 34; 41; 42; 43; 44; 52; 53; 54
Lat/Long WENS -95.0000 -60.0000 59.0000 45.0000
Subjectsenvironmental geology; geochemistry; tectonics; Nature and Environment; Science and Technology; dendrochronology; stable isotope studies; oxygen isotopes; carbon isotopes; ecosystems; tectonic history; volcanism; climatology; climate effects; meteorology; vegetation; anomalies; 1815 Tambora Volcano eruption; Taiga Shield Ecozone; Climate change; cumulative effects; Forests; Trees
Illustrationslocation maps; time series; tables; models; geoscientific sketch maps; profiles; bar graphs; plots
ProgramEnvironmental Geoscience Sources
Released2018 02 23
AbstractThe Tambora eruption (1815 AD) was one of the major eruptions of the last two millennia and has no equivalents over the last two centuries. Here, we collected an extensive network of early meteorological time series, climate simulation data and numerous, well-replicated proxy records from Eastern Canada to analyze the strength and the persistence of the Tambora impact on the regional climate and forest processes. Our results show that the Tambora impacts on the terrestrial biosphere were stronger than previously thought, and not only affected tree growth and carbon uptake for a longer period than registered in the regional climate, but also determined forest demography and structure. Increased tree mortality, four times higher than the background level, indicates that the Tambora climatic impact propagated to influence the structure of the North American taiga for several decades. We also show that the Tambora signal is more persistent in observed data (temperature, river ice dynamics, forest growth, tree mortality) than in simulated ones (climate and forest-growth simulations), indicating that our understanding of the mechanisms amplifying volcanic perturbations on climates and ecosystems is still limited, notably in the North American taiga.

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