Biomarker records in sediment core MD99-2272 from North of Iceland Shelf ...

We present a sea-ice record back to 15 ka (cal. ka BP) based on the sea-ice biomarker IP25, phytoplankton biomarker brassicasterol and terrestrial biomarker long-chain n-alkanols in piston core MD99-2272 from the North Icelandic shelf. During the Bølling/Allerød (14.7-12.9 ka), the North Icelandic s...

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Bibliographic Details
Main Authors: Xiao, Xiaotong, Zhao, Meixun, Knudsen, Karen Luise, Sha, Longbin, Eiriksson, Jón, Gudmundsdóttir, Esther Ruth, Jiang, Hui, Guo, Zhigang
Format: Dataset
Language:English
Published: PANGAEA 2017
Subjects:
DEPTH, sediment/rock
AGE
2,6,10,14-Tetramethyl-7-3-methylpent-4-enylpentadecane per unit sediment mass
24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass
n-Alkanol long chain alcohols C26+C28+C30 per unit sediment mass
Phytoplankton biomarker Brassicasterol IP25 index
Calypso Corer
MD114
Marion Dufresne 1995
Esther
Knudsen
Iceland
Nordic Seas
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.885432
https://doi.pangaea.de/10.1594/PANGAEA.885432
Description
Summary:We present a sea-ice record back to 15 ka (cal. ka BP) based on the sea-ice biomarker IP25, phytoplankton biomarker brassicasterol and terrestrial biomarker long-chain n-alkanols in piston core MD99-2272 from the North Icelandic shelf. During the Bølling/Allerød (14.7-12.9 ka), the North Icelandic shelf was characterized by extensive spring sea-ice cover linked to reduced flow of warm Atlantic Water and dominant Polar water influence, as well as strong meltwater input in the area. This pattern showed an anti-phase relationship with the ice-free/less ice conditions in marginal areas of the eastern Nordic Seas, where the Atlantic Water inflow was strong, and contributed to an enhanced deep-water formation. Prolonged sea-ice cover with occasional occurrence of seasonal sea ice prevailed during the Younger Dryas (12.9-11.7 ka) interrupted by a brief interval of enhanced Irminger Current and deposition of the Vedde Ash, as opposed to abruptly increased sea-ice conditions in the eastern Nordic Seas. The seasonal ... : Supplement to: Xiao, Xiaotong; Zhao, Meixun; Knudsen, Karen Luise; Sha, Longbin; Eiriksson, Jón; Gudmundsdóttir, Esther Ruth; Jiang, Hui; Guo, Zhigang (2017): Deglacial and Holocene sea-ice variability north of Iceland and response to ocean circulation changes. Earth and Planetary Science Letters, 472, 14-24 ...

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