Sensitivity of the CRCM atmospheric and the Gulf of St. Lawrence Ocean‐Ice models to each other

Faucher, Manon; Caya, Daniel; Saucier, François J.; Laprise, René

doi:10.3137/ao.420201

Cited by 5 publications

(3 citation statements)

References 10 publications

(14 reference statements)

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“…A regional ocean-ice model is also being coupled with CRCM for application in the Gulf of St. Lawrence [33] and Hudson Bay [87]. Most recently a version of CRCM incorporates the parameterisation package developed for CGCM3, which includes the Canadian land-surface scheme CLASS ( [102,103]).…”

Section: Parameterisation Of Subgrid-scale Physical Effects In the Crcmmentioning

confidence: 99%

Regional climate modelling

Laprise

2008

Journal of Computational Physics

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Section: Parameterisation Of Subgrid-scale Physical Effects In the Crcmmentioning

confidence: 99%

Regional climate modelling

Laprise

2008

Journal of Computational Physics

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247

155

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“…Along the Gulf of St. Lawrence North Shore, the climate is strongly influenced by the cold waters from the Labrador Current. In this region, seaice cover plays an important role in the regional climate by modifying wind strength, air temperature and cloud cover (Faucher et al, 2004). It is possible that the expansion of seaice cover and decreased SST in the Gulf of St. Lawrence during the Neoglacial cooling have amplified the atmospheric thermal response causing greater cooling in the Havre St-Pierre area.…”

Section: Paleoclimatic Interpretation Of the Water Table Variability mentioning

confidence: 99%

Evaluating long‐term regional climate variability in the maritime region of the St. Lawrence North Shore (eastern Canada) using a multi‐site comparison of peat‐based paleohydrological records

Magnan

Garneau

2014

J Quaternary Science

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This study presents paleohydrological reconstructions from ombrotrophic peatlands (bogs) along the north shore of the Estuary and the Gulf of St. Lawrence in eastern Canada. Past water table depths were reconstructed based on testate amoebae analyses within four peatlands from two maritime ecoclimatic regions (boreal and subarctic) using a new transfer function. The comparison of multiple peat-based paleohydrological records was used to distinguish climate-driven changes from variations related to site-specific factors. Coherence between the water table reconstructions at the regional scale suggests a common climatic influence on bog paleohydrology but there are inconsistencies which also suggest an influence of non-climatic factors (e.g. internal peatland processes and feedbacks). The surface drying and increased hydrological variability after 3000 cal a BP in the studied bogs coincide with the transition from the Holocene Climatic Optimum to the Neoglacial cooling documented by proxy climate records in eastern Canada. The bogs of Havre St-Pierre have experienced major drying during the late Holocene, indicating important annual-to-centennial water deficits at the peatland surface. Regional differences in the magnitude of the hydrological fluctuations may result from distinctive climatic conditions or could indicate that bog surface wetness in the Gulf of St. Lawrence was more sensitive to past climate changes.

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“…On one hand, the heat budget is modulated by insolation and exchanges between the surface ocean and the atmosphere. In particular, the winter sea-ice cover regulates the energy budget through its albedo and influences the exchanges of energy and water vapour at the ocean-atmosphere interface (Faucher et al, 2004; Wu et al, 1997). On the other hand, precipitation within the watershed determines the freshwater budget, salinity, and water mass stratification (Bourgault and Koutitonsky, 1999), while evaporation at the sea surface is a source of moisture to the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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

Lemay-Tougas

Vernal

et al. 2023

The Holocene

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The micropaleontological and palynological content, and geochemical and isotopic composition of a marine sediment core collected off Pointe-des-Monts in eastern Québec, Canada, reveal regional palaeoclimatic and paleoceanographic conditions in the Lower St. Lawrence Estuary over the last ~8200 years. The pollen and spore content allows comparison with the terrestrial palynostratigraphy, whereas dinoflagellate cysts and benthic foraminifera are used to reconstruct sea-surface conditions and bottom water properties, respectively. The dinocyst-based reconstructions indicate shifts between estuarine and oceanic conditions with important changes in sea-surface temperature, salinity, and primary productivity. Both the dinocyst assemblages and the quantitative sea-surface estimates highlight a distinct transition at ca. 4200 cal years BP. It is notably marked by a change towards higher salinity, which suggests reduced freshwater discharge, hence lower precipitation in the watershed, during the Late-Holocene. The isotopic composition (δ18O and δ13C) and assemblages of the benthic foraminifera indicate centennial to millennial frequency variability of bottom water properties, over a general trend towards decreasing temperatures and increasing ventilation from the beginning of the Middle Holocene until the last century. Since then, reverse trends with abrupt warming and decreasing dissolved oxygen content in bottom water have been observed.

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Sensitivity of the CRCM atmospheric and the Gulf of St. Lawrence Ocean‐Ice models to each other

Abstract: ABSTRACT

Cited by 5 publications

References 10 publications

Regional climate modelling

Regional climate modelling

Evaluating long‐term regional climate variability in the maritime region of the St. Lawrence North Shore (eastern Canada) using a multi‐site comparison of peat‐based paleohydrological records

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

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