@article {2618,
	title = {Paleoceanography of northeastern Fram Strait since the last glacial maximum: Palynological evidence of large amplitude changes},
	journal = {Quaternary Science Reviews},
	volume = {195},
	year = {2018},
	month = {Jan-09-2018},
	pages = {133 - 152},
	abstract = {Sea-surface conditions in northeastern Fram Strait since the last glacial maximum (LGM) were reconstructed from cores MSM5/5-712-2 and PS2863/1-2 based on palynological assemblages, ecological preferences of dinocysts and application of the modern analog technique. Dinocyst in LGM sediments are sparse, but their assemblages reflect mild summer conditions. Given the regional context and evidence from other tracers, the dinocyst assemblages of the LGM could relate to regional fluxes of dinocysts during exceptional mild summers. From 19 to 14.7 ka, dinocyst data suggest very cold conditions with extensive sea-ice cover, while abundant reworked palynomorphs indicate intense glacial erosion. An abrupt transition at 14.7-14.5 ka was marked by a peak in summer temperatures coinciding with a rapidly deposited sediment layer related to a regional meltwater plume event in western Svalbard. From 14.7 to 12.6 ka, large seasonal temperature contrasts with mild summers and cold winters together with low salinity indicate continuous melting of the
Svalbard Barents Sea ice sheet fostered by warm climate. At 12.6 ka, the regional onset of the Younger Dryas was marked by cooling and increased salinity. On a regional scale, the 12.6-12 ka interval corresponds to an important transition involving enhanced circulation of Arctic waters around Svalbard and establishment of coastal fronts along its northern and western margins. Modern-like oceanic conditions with relatively high salinity and low seasonal temperature contrast developed at about 7.6 ka. Since then, a slight cooling is observed, especially in winter. This study offers a comprehensive picture of the deglacial phases in eastern Fram Strait with unique data on the sea surface salinity, which controls surface water stratification and plays an important role in ocean circulation. (C) 2018 Elsevier Ltd. All rights reserved.
},
	issn = {02773791},
	doi = {10.1016/j.quascirev.2018.06.030},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0277379117303979https://api.elsevier.com/content/article/PII:S0277379117303979?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0277379117303979?httpAccept=text/plain},
	author = {Falardeau, Jade and de Vernal, Anne and Spielhagen, Robert F.}
}
@article {53,
	title = {Long-term hydrological changes in the northeastern Gulf of Mexico (ODP-625B) during the Holocene and late Pleistocene inferred from organic-walled dinoflagellate cysts},
	journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
	volume = {414},
	year = {2014},
	pages = {178-191},
	abstract = {Palynological analyses are used in conjunction with oxygen isotopes and Mg/Ca ratios in foraminifers in order to document the response of dinoflagellate cysts (dinocysts) assemblages to changing climate conditions in the northeastern Gulf of Mexico over the Holocene and late Pleistocene. During MIS 6, but also during the cooler phases of MIS 5, Impagidinium species and Operculodinium centrocarpum were dominating the assemblages. By contrast, during the last interglacial (LIG) and the Holocene, assemblages were mainly composed of Spiniferites taxa and characterized by high relative abundance of Spiniferites mirabilis-hyperacanthus, Operculodinium israelianum and/or Polysphaeridium zoharyi. These two periods exhibit ~ 1-2 {\textdegree}C difference in temperature as inferred from Mg/Ca ratios and show significantly distinct assemblages, with higher percentages of S. mirabilis during the LIG and higher percentages of P. zoharyi during the Holocene. This likely denotes important differences in the hydrogeographical conditions (e.g. surface circulation, bathymetric configuration) between the present and last interglacial. The importance of environmental parameters other than temperature and salinity for dinocyst assemblage dynamics is furthermore illustrated.},
	issn = {0031-0182},
	doi = {10.1016/j.palaeo.2014.08.019},
	url = {http://www.sciencedirect.com/science/article/pii/S0031018214004258},
	author = {Limoges, Audrey and de Vernal, Anne and Van Nieuwenhove, Nicolas}
}
@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}
}
