Articles | Volume 13, issue 4
https://doi.org/10.5194/cp-13-411-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-13-411-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Influence of North Pacific decadal variability on the western Canadian Arctic over the past 700 years
François Lapointe
CORRESPONDING AUTHOR
Centre – Eau Terre Environnement, Institut National de la Recherche
Scientifique Université du Québec, Québec, G1K 9A9, Canada
GEOTOP Research Centre, Montréal (Qc), H3C 3P8, Canada
Pierre Francus
Centre – Eau Terre Environnement, Institut National de la Recherche
Scientifique Université du Québec, Québec, G1K 9A9, Canada
GEOTOP Research Centre, Montréal (Qc), H3C 3P8, Canada
Scott F. Lamoureux
Department of Geography and Planning, Queen's University, Kingston, ON
K7L 3N6, Canada
Mathias Vuille
Department of Atmospheric and Environmental Sciences, University at
Albany, Albany, New York 12222, USA
Jean-Philippe Jenny
Centre – Eau Terre Environnement, Institut National de la Recherche
Scientifique Université du Québec, Québec, G1K 9A9, Canada
Max Planck Institute for Biogeochemistry, 10, 07745 Jena, Germany
Raymond S. Bradley
Northeast Climate Science Center, and Climate System Research Center,
Department of Geosciences, University of Massachusetts, Amherst, 01003,
USA
Charly Massa
Department of Geography, University of Hawai`i at Mānoa, Honolulu,
HI 96822, USA
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Clim. Past, 21, 2407–2439, https://doi.org/10.5194/cp-21-2407-2025, https://doi.org/10.5194/cp-21-2407-2025, 2025
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This study explores storm patterns in eastern Canada's Magdalen Islands over 4000 years, using coastal peatlands to understand past storm activity. Our findings reveal key storm periods, including during the Little Ice Age, linked to broader climatic shifts like the Atlantic Multidecadal Variability. By comparing our results with other North American records, we show how peat data can complement other coastal storm archives and improve our understanding of past storms.
François Lapointe, Antoine Gagnon-Poiré, Pierre Francus, Patrick Lajeunesse, and Clarence Gagnon
Clim. Past, 21, 1595–1610, https://doi.org/10.5194/cp-21-1595-2025, https://doi.org/10.5194/cp-21-1595-2025, 2025
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A new 1500-year-long sediment record made of annual laminations (varves) from Grand Lake, Labrador, reveals past hydroclimatic conditions. The Medieval Climate Anomaly (~1050–1225 CE) had thicker varves indicating more precipitation, while the Little Ice Age (1400–1875 CE) had thinner varves, suggesting a dryer climate. Teleconnections show that Grand Lake is influenced by winter North Atlantic Oscillation (NAO), hence making this record a promising candidate for future NAO reconstructions.
Marie-Eugénie Meusseunan Pascale Jamba, Pierre Francus, Antoine Gagnon-Poiré, and Guillaume St-Onge
Geochronology, 7, 83–111, https://doi.org/10.5194/gchron-7-83-2025, https://doi.org/10.5194/gchron-7-83-2025, 2025
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This article presents a non-destructive method for studying laminated sediments with X-ray micro-computed tomography (μCT). It aims to study the possibility of using μCT as an analytical tool to analyse varved sediments in the context of paleoclimatic studies. As a result, µCT offers the possibility of doing fast analysis and constitutes a powerful tool to improve the quality of results through the access of a 3D view, allowing for choosing the most representative part of a varved record.
Maxime P. Boreux, Scott F. Lamoureux, and Brian F. Cumming
Hydrol. Earth Syst. Sci., 25, 6309–6332, https://doi.org/10.5194/hess-25-6309-2021, https://doi.org/10.5194/hess-25-6309-2021, 2021
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The investigation of groundwater–lake-water interactions in highly permeable boreal terrain using several indicators showed that lowland lakes are embedded into the groundwater system and are thus relatively resilient to short-term hydroclimatic change, while upland lakes rely more on precipitation as their main water input, making them more sensitive to evaporative drawdown. This suggests that landscape position controls the vulnerability of lake-water levels to hydroclimatic change.
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Short summary
Using a unique annually-laminated record (varve) from the western Canadian High Arctic, we found a significant relationship between our varve record and instrumental and reconstructed Pacific Decadal Oscillations (PDOs). The negative (positive) PDO (North Pacific Index) phases increase precipitation as low sea-ice extent, warmer temperature and winds reach our region more efficiently. Our results imply that future negative PDO phases will likely impact the already rapidly warming Arctic.
Using a unique annually-laminated record (varve) from the western Canadian High Arctic, we found...
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