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de Vernal, Anne; Hillaire-Marcel, Claude; Turon, Jean-Louis; Matthiessen, Jens (2000): Dinocyst assemblages of site HM52-43 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.79362, Supplement to: de Vernal, A et al. (2000): Reconstruction of sea-surface temperature, salinity, and sea-ice cover in the northern North Atlantic during the last glacial maximum based on dinocyst assemblages. Canadian Journal of Earth Sciences, 37(5), 725-750, https://doi.org/10.1139/cjes-37-5-725

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Abstract:
Past sea-surface conditions over the northern North Atlantic during the last glacial maximum were examined from the study of 61 deep-sea cores. The last glacial maximum time slice studied here corresponds to an interval between Heinrich layers H2 and H1, and spanning about 20-16 ka on a 14C time scale. Transfer functions based on dinocyst assemblages were used to reconstruct sea-surface temperature, salinity, and sea-ice cover. The results illustrate extensive sea-ice cover along the eastern Canadian margins and sea-ice spreading, only during winter, over most of the northern North Atlantic. On the whole, much colder winter prevailed, despite relatively mild conditions in August (10-15°C at most offshore sites), thus suggesting a larger seasonal contrast of temperatures than today. Lower salinity than at present is reconstructed, especially along the eastern Canadian and Scandinavian margins, likely because of meltwater supply from the surrounding ice sheets. These reconstructions contrast with those established by CLIMAP on the basis of planktonic foraminifera. These differences are discussed with reference to the stratigraphical frame of the last glacial maximum, which was not the coldest phase of the last glacial stage. The respective significance of dinocyst and foraminifer records is also examined in terms of the thermohaline characteristics of surface waters and the vertical structure of upper water masses, which was apparently much more stratified than at present in the northern North Atlantic, thus preventing deep-water formation.
Project(s):
Multiproxy Approach for the Reconstruction of the Glacial Ocean surface (MARGO)
Coverage:
Latitude: 64.250000 * Longitude: 0.733333
Minimum DEPTH, sediment/rock: 0.68 m * Maximum DEPTH, sediment/rock: 0.82 m
Event(s):
HM52-43 (52-43) * Latitude: 64.250000 * Longitude: 0.733333 * Elevation: -2781.0 m * Location: northern North Atlantic * Method/Device: Gravity corer (GC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 DEPTH, sediment/rockDepth sedmGeocode
2 Nematosphaeropsis labyrinthusN. labyrinthus%de Vernal, AnneCounting, dinoflagellate cysts
3 Peridinium faeroenseP. faeroense%de Vernal, AnneCounting, dinoflagellate cysts
4 Trinovantedinium capitatumT. capitatum%de Vernal, AnneCounting, dinoflagellate cysts
5 Algidasphaeridium minutumA. minutum%de Vernal, AnneCounting, dinoflagellate cysts
6 Brigantedinium spp.Brigantedinium spp.%de Vernal, AnneCounting, dinoflagellate cysts
7 Peridinoid typePerid-T%de Vernal, AnneCounting, dinoflagellate cysts
8 Polykrikos schwarziiP. schwarzii%de Vernal, AnneCounting, dinoflagellate cysts
9 Multispinula quantaM. quanta%de Vernal, AnneCounting, dinoflagellate cysts
10 Alexandrium excavatumA. excavatum%de Vernal, AnneCounting, dinoflagellate cysts
11 Bitectatodinium tepikienseB. tepikiense%de Vernal, AnneCounting, dinoflagellate cysts
12 Impagidinium aculeatumI. aculeatum%de Vernal, AnneCounting, dinoflagellate cysts
13 Impagidinium patulumI. patulum%de Vernal, AnneCounting, dinoflagellate cysts
14 Impagidinium paradoxumI. paradoxum%de Vernal, AnneCounting, dinoflagellate cysts
15 Impagidinium sphaericumI. sphaericum%de Vernal, AnneCounting, dinoflagellate cysts
16 Operculodinium centrocarpumO. centrocarpum%de Vernal, AnneCounting, dinoflagellate cysts
17 Operculodinium centrocarpumO. centrocarpum%de Vernal, AnneCounting, dinoflagellate cystssensu Wall & Dale 1966
18 Spiniferites spp.Spiniferites spp.%de Vernal, AnneCounting, dinoflagellate cysts
19 Spiniferites bentoriS. bentori%de Vernal, AnneCounting, dinoflagellate cysts
20 Spiniferites ramosusS. ramosus%de Vernal, AnneCounting, dinoflagellate cysts
21 Spiniferites elongatusS. elongatus%de Vernal, AnneCounting, dinoflagellate cysts
22 Spiniferites membranaceusS. membranaceus%de Vernal, AnneCounting, dinoflagellate cysts
23 Spiniferites mirabilisS. mirabilis%de Vernal, AnneCounting, dinoflagellate cysts
24 Lingulodinium machaerophorumL. machaerophorum%de Vernal, AnneCounting, dinoflagellate cysts
25 Pyxidinopsis reticulataP. reticulata%de Vernal, AnneCounting, dinoflagellate cysts
26 Ataxiodinium choaneA. choane%de Vernal, AnneCounting, dinoflagellate cysts
27 Impagidinium pallidumI. pallidum%de Vernal, AnneCounting, dinoflagellate cysts
28 Algidasphaeridium minutum var. cesareA. minutum var. cesare%de Vernal, AnneCounting, dinoflagellate cysts
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
216 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Depth sed [m]		2 
N. labyrinthus [%]		3 
P. faeroense [%]		4 
T. capitatum [%]		5 
A. minutum [%]		6 
Brigantedinium spp. [%]		7 
Perid-T [%]		8 
P. schwarzii [%]		9 
M. quanta [%]		10 
A. excavatum [%]		11 
B. tepikiense [%]		12 
I. aculeatum [%]		13 
I. patulum [%]		14 
I. paradoxum [%]		15 
I. sphaericum [%]		16 
O. centrocarpum [%]		17 
O. centrocarpum [%]
(sensu Wall & Dale 1966)		18 
Spiniferites spp. [%]		19 
S. bentori [%]		20 
S. ramosus [%]		21 
S. elongatus [%]		22 
S. membranaceus [%]		23 
S. mirabilis [%]		24 
L. machaerophorum [%]		25 
P. reticulata [%]		26 
A. choane [%]		27 
I. pallidum [%]		28 
A. minutum var. cesare [%]
0.680.01.70.02.55.80.00.00.00.054.20.00.00.00.030.80.00.00.04.20.80.00.00.00.00.00.00.0
0.700.05.60.00.04.00.00.00.00.046.40.00.00.00.035.20.02.40.02.42.40.00.01.60.00.00.00.0
0.720.00.00.00.07.90.00.00.00.054.30.00.00.00.028.60.00.00.08.60.00.70.00.00.00.00.00.0
0.740.00.00.00.09.20.00.00.00.058.80.00.00.00.030.50.00.00.01.50.00.00.00.00.00.00.00.0
0.760.96.40.00.91.80.00.00.00.048.20.00.00.00.032.70.00.00.08.20.90.00.00.00.00.00.00.0
0.780.00.70.00.06.30.00.00.70.057.60.00.00.00.031.90.00.00.02.10.70.00.00.00.00.00.00.0
0.800.00.70.02.74.70.00.00.00.053.70.00.00.00.029.50.00.70.07.40.00.00.00.70.00.00.00.0
0.820.01.30.01.30.00.00.00.00.046.80.00.00.00.049.40.00.00.00.00.01.30.00.00.00.00.00.0