The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada

Climate changes over the past two millennia in the central part of the Gulf of St. Lawrence are documented in this paper with the aim of determining and understanding the natural climate variability and the impact of anthropogenic forcing at a regional scale. The palynological content (dinocysts, pollen, and spores) of the composite marine sediment core MSM46-03 collected in the Laurentian Channel was used to reconstruct oceanographic and climatic changes with a multidecadal temporal resolution. Sea-surface conditions, including summer salinity and temperature, sea-ice cover, and primary productivity, were reconstructed from dinocyst assemblages. Results revealed a remarkable cooling trend of about 4°C after 1230 cal yr BP (720 CE) and a culmination with a cold pulse dated to 170–40 cal yr BP (1780–1910 CE), which likely corresponds to the regional signal of the Little Ice Age. This cold interval was followed by a rapid warming of about 3°C. In the pollen assemblages, the decrease of Pinus abundance over the past 1700 yr suggests changes in wind regimes, likely resulting from increased southerly incursions of cold and dry Arctic air masses into southeastern Canada.

Abrupt climate change · Alkenone · Arctic · Climate change · Climatology · Dinocyst · Effects of global warming · Geography · Global warming · Holocene · Palynology · Physical geography · Pollen · Ecology · Geology · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and environmental studies · Oceanography

• Climate-driven Holocene ecohydrological and carbon dynamics from maritime peatlands of the Gulf of St. Lawrence, eastern Canada

  Open Access•Léonie Perrier, Michelle Garneau et al.•The Holocene•2022

  Añadir item

• Multi-proxy reconstruction of climate changes in the Lower St. Lawrence Estuary, Canada, during the Middle and Late-Holocene

  Open Access•Xiner Wu, Mathieu Lemay-Tougas et al.•The Holocene•2023

  Añadir item

• High-resolution forest and fire dynamics from Fish Lake, New Brunswick, Canada, during the last millennium

  Open Access•Ryan Collins, Ryan J Collins et al.•The Holocene•2026

  Añadir item

• Holocene Vegetation Dynamics of Anticosti Island, Québec, and Consequences of Remoteness on Ecological Succession

  Open Access•Martin Lavoie, Louise Filion•Quaternary Research•2001

  Añadir item

• Continental-scale temperature variability during the past two millennia

  Open Access•Moinuddin Ahmed, PAGES 2k Consortium et al.•Nature Geoscience•2013

  Añadir item

• A Reconstruction of Regional and Global Temperature for the Past 11,300 Years

  Open Access•Shaun A Marcott, Jeremy D Shakun et al.•Science•2013

  Añadir item

• A long-term numerical solution for the insolation quantities of the Earth

  Open Access•J Laskar, Philippe Robutel et al.•Astronomy & Astrophysics•2004

  Añadir item

• Years of Cosmic Radiation and Solar Activity From Ice Cores and Tree Rings

  Open Access•Friedhelm Steinhilber, Jose A Abreu et al.•Proceedings of the National…•2012

  Añadir item

• Complexity of Holocene Climate as Reconstructed from a Greenland Ice Core

  Open Access•S R O'Brien, Suzanne O’Brien et al.•Science•1995

  Añadir item

• Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly

  Open Access•M Mann, Michael E Mann et al.•Science•2009

  Añadir item

• Flexible paleoclimate age-depth models using an autoregressive gamma process

  Open Access•Martijn Blaauw, Maarten Blaauw et al.•Bayesian Analysis•2011

  Añadir item

• Climate, History And The Modern World

  Hubert H Lamb•Climate, History And The Modern…•2002

  Añadir item

• Dark Ages Cold Period

  Open Access•Samuli Helama, P D Jones et al.•The Holocene•2017

  Añadir item

• Late-Holocene sea-surface conditions offshore Newfoundland based on dinoflagellate cysts

  Open Access•Sandrine Solignac, Marit-Solveig Seidenkrantz et al.•The Holocene•2011

  Añadir item

• Late-Holocene atmospheric dust deposition in eastern Canada (St. Lawrence North Shore)

  Open Access•Steve Pratte, Michelle Garneau et al.•The Holocene•2016

  Añadir item

• IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP

  Open Access•Paula J Reimer, Edouard Bard et al.•Radiocarbon•2013

  Añadir item