(Table 1) Age determination of sediment core MD99-2284 ...

Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid r...

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Bibliographic Details
Main Authors: Dokken, Trond, Nisancioglu, Kerim H, Li, Camille, Battisti, David S, Kissel, Catherine
Format: Dataset
Language:English
Published: PANGAEA 2013
Subjects:
Sample ID
DEPTH, sediment/rock
Age, dated
Age, dated standard deviation
Calendar age
Age, maximum/old
Age, minimum/young
Age model
Calypso Corer
Age, 14C AMS
Age, 14C calibrated
MD114
Marion Dufresne 1995
Fennoscandian
Fugloy*
Greenland
Nordic Seas
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.820939
https://doi.pangaea.de/10.1594/PANGAEA.820939
Description
Summary:Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid return to stadial conditions. The mechanisms responsible for these millennial cycles are not fully understood but are widely thought to involve abrupt changes in Atlantic Meridional Overturning Circulation due to freshwater perturbations. Here we present a new, high-resolution multiproxy marine sediment core monitoring changes in the warm Atlantic inflow to the Nordic seas as well as in local sea ice cover and influx of ice-rafted debris. In contrast to previous studies, the freshwater input is found to be coincident with warm interstadials on Greenland and has a Fennoscandian rather than Laurentide source. Furthermore, the data suggest a different thermohaline structure for the Nordic seas during cold stadials in ... : Measured on N. pachyderma sin. Also shown in the table are two identified ash layers. The ages given for Fugloyarbanki Tephra (FMAZII) and Faroe Marine Ash Zone III (FMAZIII) are from Svensson et al. (2008). The ash ages are referred to in b2k (before year A.D. 2000). Samples with laboratory reference "TUa-" are measured at the Uppsala Accelerator in Sweden, but the samples have been prepared at the radiocarbon laboratory in Trondheim, Norway. Samples labeled "POZ-" are prepared and measured in the radiocarbon laboratory in Poznan, Poland. ...

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