Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn
Abstract. To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El’gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacialinterglacial...
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ftunivbern:oai:boris.unibe.ch:45270 2023-08-20T04:04:02+02:00 Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn Cunningham, L. Vogel, Hendrik Wennrich, V. Juschus, O. Nowaczyk, N. Rosén, P. 2013 application/pdf https://boris.unibe.ch/45270/1/Cunningham_etal%282013%29TIV_LakeE.pdf https://boris.unibe.ch/45270/ eng eng Copernicus Publications https://boris.unibe.ch/45270/ info:eu-repo/semantics/openAccess Cunningham, L.; Vogel, Hendrik; Wennrich, V.; Juschus, O.; Nowaczyk, N.; Rosén, P. (2013). Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn. Climate of the past, 9(2), pp. 679-686. Copernicus Publications 10.5194/cp-9-679-2013 <http://dx.doi.org/10.5194/cp-9-679-2013> 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2013 ftunivbern https://doi.org/10.5194/cp-9-679-2013 2023-07-31T21:04:31Z Abstract. To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El’gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacialinterglacial cycles during the last three million years. Lowresolution studies at this lake have suggested that changes observed during Transition IV (the transition from marine isotope stage (MIS) 10 to MIS 9) are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high-resolution analyses of Transition IV from a terrestrial Arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica (BSi) production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and BSi records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements. Article in Journal/Newspaper Arctic Greenland BORIS (Bern Open Repository and Information System, University of Bern) Arctic Greenland Climate of the Past 9 2 679 686 |
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Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
550 Earth sciences & geology |
spellingShingle |
550 Earth sciences & geology Cunningham, L. Vogel, Hendrik Wennrich, V. Juschus, O. Nowaczyk, N. Rosén, P. Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
topic_facet |
550 Earth sciences & geology |
description |
Abstract. To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El’gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacialinterglacial cycles during the last three million years. Lowresolution studies at this lake have suggested that changes observed during Transition IV (the transition from marine isotope stage (MIS) 10 to MIS 9) are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high-resolution analyses of Transition IV from a terrestrial Arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica (BSi) production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and BSi records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements. |
format |
Article in Journal/Newspaper |
author |
Cunningham, L. Vogel, Hendrik Wennrich, V. Juschus, O. Nowaczyk, N. Rosén, P. |
author_facet |
Cunningham, L. Vogel, Hendrik Wennrich, V. Juschus, O. Nowaczyk, N. Rosén, P. |
author_sort |
Cunningham, L. |
title |
Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
title_short |
Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
title_full |
Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
title_fullStr |
Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
title_full_unstemmed |
Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
title_sort |
amplified bioproductivity during transition iv (332 000-342 000 yr ago): evidence from the geochemical record of lake el'gygytgyn |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://boris.unibe.ch/45270/1/Cunningham_etal%282013%29TIV_LakeE.pdf https://boris.unibe.ch/45270/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Cunningham, L.; Vogel, Hendrik; Wennrich, V.; Juschus, O.; Nowaczyk, N.; Rosén, P. (2013). Amplified bioproductivity during Transition IV (332 000-342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn. Climate of the past, 9(2), pp. 679-686. Copernicus Publications 10.5194/cp-9-679-2013 <http://dx.doi.org/10.5194/cp-9-679-2013> |
op_relation |
https://boris.unibe.ch/45270/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-9-679-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
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679 |
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686 |
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1774714461854105600 |