Biomarker analyses on sediment core BP00-07/07 from the southern Kara Sea (Arctic Ocean) ...
The Holocene is characterized by the late Holocene cooling trend as well as by internal short-term centennial fluctuations. As Arctic sea ice acts as a significant component (amplifier) within the climate system, investigating its past long- and short-term variability and controlling processes is be...
Main Authors: | , , |
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Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2017
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.871593 https://doi.pangaea.de/10.1594/PANGAEA.871593 |
Summary: | The Holocene is characterized by the late Holocene cooling trend as well as by internal short-term centennial fluctuations. As Arctic sea ice acts as a significant component (amplifier) within the climate system, investigating its past long- and short-term variability and controlling processes is beneficial for climate future predictions. This study presents the first biomarker-based (IP25 and PIP25) sea ice reconstruction from the Kara Sea (Core BP00-07/07), covering the last 8 ka. These biomarker proxies reflect conspicuous short-term sea ice variability during the last 6.5 ka that is identified unprecedentedly in the source region of Arctic sea ice by means of a direct sea ice indicator. Prominent peaks of extended sea ice cover occurred at ~3, ~2, ~1.3 and ~0.3 ka Spectral analysis of the IP25 record revealed ~400- and ~950-year cycles. These periodicities may be related to the Arctic/North Atlantic Oscillation (AO/NAO), but probably also to internal climate system fluctuations. This demonstrates that ... : Supplement to: Hörner, Tanja; Stein, Ruediger; Fahl, Kirsten (2017): Evidence for Holocene centennial variability in sea ice cover based on IP25 biomarker reconstruction in the southern Kara Sea (Arctic Ocean). Geo-Marine Letters, 37(5), 515-526 ... |
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