Biomarker analyses on sediment core BP00-07/07 from the southern Kara Sea (Arctic Ocean)
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2017
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| _version_ | 1867170996141686784 |
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| author | Hörner, Tanja Stein, Ruediger Fahl, Kirsten |
| author_facet | Hörner, Tanja Stein, Ruediger Fahl, Kirsten |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 sea ice belongs to a complex system that more likely depends on multiple internal forcing. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_871593 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Biomarker analyses on sediment core BP00-07/07 from the southern Kara Sea (Arctic Ocean) Hörner, Tanja Stein, Ruediger Fahl, Kirsten 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol, per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol, per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit sediment mass; Akademik Boris Petrov; AWI_Paleo; BP00; BP00-07/07; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO CNS-2000; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Kara Sea; Paleoenvironmental Reconstructions from Marine Sediments @ AWI 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 sea ice belongs to a complex system that more likely depends on multiple internal forcing. |
| title | Biomarker analyses on sediment core BP00-07/07 from the southern Kara Sea (Arctic Ocean) |
| topic | 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol, per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol, per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit sediment mass; Akademik Boris Petrov; AWI_Paleo; BP00; BP00-07/07; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO CNS-2000; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Kara Sea; Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
| url | https://doi.org/10.1594/PANGAEA.871593 |