Data Description

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Citation:
Werner, K et al. (2011): (Fig. 4) Multiproxy data set of box core MSM5/5-712-1. doi:10.1594/PANGAEA.761540,
Supplement to: Werner, Kirstin; Spielhagen, Robert F; Bauch, Dorothea; Hass, H Christian; Kandiano, Evgeniya S; Zamelczyk, Katarzyna (2011): Atlantic Water advection to the eastern Fram Strait - multiproxy evidence for late Holocene variability. Palaeogeography, Palaeoclimatology, Palaeoecology, 308(3-4), 264-276, doi:10.1016/j.palaeo.2011.05.030
Abstract:
A multiproxy data set of an AMS radiocarbon dated 46 cm long sediment core from the continental margin off western Svalbard reveals multidecadal climatic variability during the past two millennia. Investigation of planktic and benthic stable isotopes, planktic foraminiferal fauna, and lithogenic parameters aims to unveil the Atlantic Water advection to the eastern Fram Strait by intensity, temperatures, and salinities. Atlantic Water has been continuously present at the site over the last 2,000 years. Superimposed on the increase in sea ice/icebergs, a strengthened intensity of Atlantic Water inflow and seasonal ice-free conditions were detected at ~ 1000 to 1200 AD, during the well-known Medieval Climate Anomaly (MCA). However, temperatures of the MCA never exceeded those of the 20th century. Since ~ 1400 AD significantly higher portions of ice rafted debris and high planktic foraminifer fluxes suggest that the site was located in the region of a seasonal highly fluctuating sea ice margin. A sharp reduction in planktic foraminifer fluxes around 800 AD and after 1730 AD indicates cool summer conditions with major influence of sea ice/icebergs. High amounts of the subpolar planktic foraminifer species Turborotalia quinqueloba in size fraction 150-250 µm indicate strengthened Atlantic Water inflow to the eastern Fram Strait already after ~ 1860 AD. Nevertheless surface conditions stayed cold well into the 20th century indicated by low planktic foraminiferal fluxes. Most likely at the beginning of the 20th century, cold conditions of the terminating Little Ice Age period persisted at the surface whereas warm and saline Atlantic Water already strengthened, hereby subsiding below the cold upper mixed layer. Surface sediments with high abundances of subpolar planktic foraminifers indicate a strong inflow of Atlantic Water providing seasonal ice-free conditions in the eastern Fram Strait during the last few decades.
Project(s):
Coverage:
Latitude: 78.915662 * Longitude: 6.767167
Minimum Age: -0.057 ka BP * Maximum Age: 2.070 ka BP
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 0.5 m
Event(s):
MSM05/5_712-1 * * Latitude: 78.915662 * Longitude: 6.767167 * Date/Time: 2007-08-04T09:00:00 * Elevation: -1491.0 m * Recovery: 0.47 m * Location: Fram Strait * * Campaign: MSM05/5 * * Basis: Maria S. Merian * * Device: Giant box corer *
Comment:
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rock *DepthmGeocode
2AGE *Ageka BPGeocode
3Age *Agea ADWerner, Kirstin *
4Foraminifera, planktic flux *Foram plankt flux#/cm2/kaWerner, Kirstin *Calculated, see reference(s) *size fraction 100-250 µm
5Accumulation rate, ice rafted debris by number *Acc rate IRD#/cm2/kaWerner, Kirstin *Calculated, see reference(s) *size fraction 150-250 µm
6Silt-Mean, sortable *Mean silt sµmWerner, Kirstin *
7Size fraction 1.000-0.063 mm *1 mm-63 µm%Werner, Kirstin *
8Ice rafted debris *IRD#/gWerner, Kirstin *
9Sea surface salinity *SSSWerner, Kirstin *Calculated, see reference(s) *Summer, (d18O = 0.4708 x S -16.195), 100-500 m water depth
10Neogloboquadrina pachyderma sinistral, d13C *N. pachyderma s d13Cper mil PDBWerner, Kirstin *Mass spectrometer Finnigan MAT 253 *
11Neogloboquadrina pachyderma sinistral, d18O *N. pachyderma s d18Oper mil PDBWerner, Kirstin *Mass spectrometer Finnigan MAT 253 *
12Cibicidoides wuellerstorfi, d13C *C. wuellerstorfi d13Cper mil PDBWerner, Kirstin *Mass spectrometer Finnigan MAT 253 *
13Cibicidoides wuellerstorfi, d18O *C. wuellerstorfi d18Oper mil PDBWerner, Kirstin *Mass spectrometer Finnigan MAT 253 *
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Size:
971 data points

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