Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions
To evaluate the present sea ice changes in a longer‐term perspective, the knowledge of sea ice variability on preindustrial and geological time scales is essential. For the interpretation of proxy reconstructions it is necessary to understand the recent signals of different sea ice proxies from vari...
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ftdatacite:10.23689/fidgeo-4382 2023-05-15T14:37:35+02:00 Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions Kolling, Henriette M. Stein, Ruediger Fahl, Kirsten Sadatzki, Henrik De Vernal, Anne Xiao, Xiaotong 2020 https://dx.doi.org/10.23689/fidgeo-4382 https://e-docs.geo-leo.de/handle/11858/8728 en eng FID GEO Text Article article-journal ScholarlyArticle 2020 ftdatacite https://doi.org/10.23689/fidgeo-4382 2021-11-05T12:55:41Z To evaluate the present sea ice changes in a longer‐term perspective, the knowledge of sea ice variability on preindustrial and geological time scales is essential. For the interpretation of proxy reconstructions it is necessary to understand the recent signals of different sea ice proxies from various regions. We present 260 new sediment surface samples collected in the (sub‐)Arctic Oceans that were analyzed for specific sea ice (IP25) and open‐water phytoplankton biomarkers (brassicasterol, dinosterol, and highly branched isoprenoid [HBI] III). This new biomarker data set was combined with 615 previously published biomarker surface samples into a pan‐Arctic database. The resulting pan‐Arctic biomarker and sea ice index (PIP25) database shows a spatial distribution correlating well with the diverse modern sea ice concentrations. We find correlations of PBIP25, PDIP25, and PIIIIP25 with spring and autumn sea ice concentrations. Similar correlations with modern sea ice concentrations are observed in Baffin Bay. However, the correlations of the PIP25 indices with modern sea ice concentrations differ in Fram Strait from those of the (sub‐)Arctic data set, which is likely caused by region‐specific differences in sea ice variability, nutrient availability, and other environmental conditions. The extended (sea ice) biomarker database strengthens the validity of biomarker sea ice reconstructions in different Arctic regions and shows how different sea ice proxies combined may resolve specific seasonal sea ice conditions. : Key Points: IP25 provides information about modern sea ice cover on a (sub‐)Arctic‐wide scale. All PIP25 indices correlate well with spring and autumn sea ice concentrations on a (sub‐)Arctic‐wide scale. The combination of biomarker data and dinoflagellate cysts may yield an approach to reconstruct sea ice conditions during different seasons. : EC | Seventh Framework Programme (FP7) http://dx.doi.org/10.13039/100011102 : European Research Council http://dx.doi.org/10.13039/501100000781 : Deutsche Forschungsgemeinschaft (DFG) http://dx.doi.org/10.13039/501100001659 Text Arctic Baffin Bay Baffin Bay Baffin Fram Strait Phytoplankton Sea ice DataCite Metadata Store (German National Library of Science and Technology) Arctic Baffin Bay |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
To evaluate the present sea ice changes in a longer‐term perspective, the knowledge of sea ice variability on preindustrial and geological time scales is essential. For the interpretation of proxy reconstructions it is necessary to understand the recent signals of different sea ice proxies from various regions. We present 260 new sediment surface samples collected in the (sub‐)Arctic Oceans that were analyzed for specific sea ice (IP25) and open‐water phytoplankton biomarkers (brassicasterol, dinosterol, and highly branched isoprenoid [HBI] III). This new biomarker data set was combined with 615 previously published biomarker surface samples into a pan‐Arctic database. The resulting pan‐Arctic biomarker and sea ice index (PIP25) database shows a spatial distribution correlating well with the diverse modern sea ice concentrations. We find correlations of PBIP25, PDIP25, and PIIIIP25 with spring and autumn sea ice concentrations. Similar correlations with modern sea ice concentrations are observed in Baffin Bay. However, the correlations of the PIP25 indices with modern sea ice concentrations differ in Fram Strait from those of the (sub‐)Arctic data set, which is likely caused by region‐specific differences in sea ice variability, nutrient availability, and other environmental conditions. The extended (sea ice) biomarker database strengthens the validity of biomarker sea ice reconstructions in different Arctic regions and shows how different sea ice proxies combined may resolve specific seasonal sea ice conditions. : Key Points: IP25 provides information about modern sea ice cover on a (sub‐)Arctic‐wide scale. All PIP25 indices correlate well with spring and autumn sea ice concentrations on a (sub‐)Arctic‐wide scale. The combination of biomarker data and dinoflagellate cysts may yield an approach to reconstruct sea ice conditions during different seasons. : EC | Seventh Framework Programme (FP7) http://dx.doi.org/10.13039/100011102 : European Research Council http://dx.doi.org/10.13039/501100000781 : Deutsche Forschungsgemeinschaft (DFG) http://dx.doi.org/10.13039/501100001659 |
format |
Text |
author |
Kolling, Henriette M. Stein, Ruediger Fahl, Kirsten Sadatzki, Henrik De Vernal, Anne Xiao, Xiaotong |
spellingShingle |
Kolling, Henriette M. Stein, Ruediger Fahl, Kirsten Sadatzki, Henrik De Vernal, Anne Xiao, Xiaotong Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
author_facet |
Kolling, Henriette M. Stein, Ruediger Fahl, Kirsten Sadatzki, Henrik De Vernal, Anne Xiao, Xiaotong |
author_sort |
Kolling, Henriette M. |
title |
Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
title_short |
Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
title_full |
Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
title_fullStr |
Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
title_full_unstemmed |
Biomarker Distributions in (Sub)‐Arctic Surface Sediments and Their Potential for Sea Ice Reconstructions |
title_sort |
biomarker distributions in (sub)‐arctic surface sediments and their potential for sea ice reconstructions |
publisher |
FID GEO |
publishDate |
2020 |
url |
https://dx.doi.org/10.23689/fidgeo-4382 https://e-docs.geo-leo.de/handle/11858/8728 |
geographic |
Arctic Baffin Bay |
geographic_facet |
Arctic Baffin Bay |
genre |
Arctic Baffin Bay Baffin Bay Baffin Fram Strait Phytoplankton Sea ice |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Fram Strait Phytoplankton Sea ice |
op_doi |
https://doi.org/10.23689/fidgeo-4382 |
_version_ |
1766309818970144768 |