@article {61,
	title = {Oceanographic regimes in the northwest Labrador Sea since Marine Isotope Stage 3 based on dinocyst and stable isotope proxy records},
	journal = {APEX II: Arctic Palaeoclimate and its Extremes},
	volume = {92},
	year = {2014},
	pages = {269-279},
	abstract = {Sea surface temperature (SST), salinity and density gradients in the upper water column of the northwest Labrador Sea have been reconstructed based on high resolution analysis of a core (HU2008-029-004PC) spanning the last \~{}36 ka, raised off Hudson Strait. The modern analogue technique was applied to dinocyst assemblages and combined with stable isotope data from Neogloboquadrina pachyderma left-coiled (Npl) for this purpose. Three oceanographic regimes were identified, broadly corresponding to the {\textquotedblleft}glacial{\textquotedblright}, {\textquotedblleft}deglacial{\textquotedblright} and {\textquotedblleft}postglacial{\textquotedblright} intervals. The site remained under the direct influence of the Laurentide Ice Sheet (LIS) margin until the postglacial and did not record the B{\o}lling-Aller{\o}d warming and weakly recorded the Younger Dryas event. The {\textquotedblleft}glacial{\textquotedblright} regime lasted until \~{}12.2 cal ka BP. It was characterized by generally low concentrations of dinocysts within an assemblage indicative of quasi-perennial sea ice. The {\textquotedblleft}deglacial{\textquotedblright} regime (ca 12.2{\textendash}8.3 cal ka BP) was marked by increased biogenic fluxes and more diversified dinocyst assemblages and possibly an enhanced subsurface inflow of North East Atlantic Deep Water. Warm summer (\~{}11 {\textdegree}C) but low winter (\~{}0 {\textdegree}C) sea surface temperatures, sea ice cover during about 3 months per year, and low summer salinity (\~{}28) suggest strong stratification in the upper water layer in relation to meltwater supply from the LIS. Following the final drainage of glacial Lake Agassiz through Hudson Strait, which is dated here at \~{}8.3 cal ka BP, and the subsequent LIS collapse, increased summer salinity (up to \~{}35) was accompanied by a reduced seasonal gradient of sea surface temperature from winter (\~{}3.8 {\textdegree}C) to summer (\~{}8.6 {\textdegree}C) suggesting enhanced penetration of North Atlantic Water. Weakened stratification of the surface water layer then allowed for winter convection and Labrador Sea Water formation, which is consistent with increased Npl-δ13C values in response to higher ventilation of the subsurface water layer.},
	issn = {0277-3791},
	doi = {10.1016/j.quascirev.2013.12.010},
	url = {http://www.sciencedirect.com/science/article/pii/S0277379113004915},
	author = {Gibb, Olivia T. and Hillaire-Marcel, Claude and de Vernal, Anne}
}
@mastersthesis {1309,
	title = {Foraminiferal indicators of paleoceanographic and sea-ice conditions in the Amundsen Gulf and Viscount Melville Sound, Canadian Arctic},
	volume = {M.Sc.},
	year = {2010},
	month = {2010},
	school = {DALHOUSIE UNIVERSITY},
	abstract = {Sediment cores were collected from the Canadian Arctic Archipelago to reconstruct the region{\textquoteright}s oceanographic and sea ice history via foraminiferal proxies. Foraminiferal species assemblages reflect changes in sea ice cover due to the dissolution of calcareous foraminifera during increased productivity in ice-free waters. The upper five cm of sediment of the core located in the Amundsen Gulf is characterized by a predominantly agglutinated foraminiferal assemblage that spanned the last century, indicative of a seasonally ice-free Amundsen Gulf. In contrast to the recent assemblage, a predominantly calcareous assemblage indicated carbonate preservation within the Amundsen Gulf during a period of perennial ice extending back to the 9th century AD. During the Medieval Warm Period and the Anthropocene, two recent periods of warmer climate, foraminiferal proxies indicated different sea ice regimes. These results suggest that the factors forcing sea ice extent have changed in recent decades.},
	keywords = {Biological oceanography, Environmental science, Paleoclimate Science, Paleontology},
	author = {Gibb, Olivia T.}
}
