Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn
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 glacial-interglacial cyc...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:406149dcaa3e4409a12b9745efc6bed1 2023-05-15T14:52:28+02:00 Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn L. Cunningham H. Vogel V. Wennrich O. Juschus N. Nowaczyk P. Rosén 2013-03-01 https://doi.org/10.5194/cp-9-679-2013 http://www.clim-past.net/9/679/2013/cp-9-679-2013.pdf https://doaj.org/article/406149dcaa3e4409a12b9745efc6bed1 en eng Copernicus Publications doi:10.5194/cp-9-679-2013 1814-9324 1814-9332 http://www.clim-past.net/9/679/2013/cp-9-679-2013.pdf https://doaj.org/article/406149dcaa3e4409a12b9745efc6bed1 undefined Climate of the Past, Vol 9, Iss 2, Pp 679-686 (2013) geo anthro-bio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/cp-9-679-2013 2023-01-22T19:27:00Z 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 glacial-interglacial cycles during the last three million years. Low-resolution 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 Unknown Arctic Greenland Climate of the Past 9 2 679 686 |
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English |
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geo anthro-bio |
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geo anthro-bio L. Cunningham H. Vogel V. Wennrich O. Juschus N. Nowaczyk P. Rosén Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn |
topic_facet |
geo anthro-bio |
description |
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 glacial-interglacial cycles during the last three million years. Low-resolution 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 |
L. Cunningham H. Vogel V. Wennrich O. Juschus N. Nowaczyk P. Rosén |
author_facet |
L. Cunningham H. Vogel V. Wennrich O. Juschus N. Nowaczyk P. Rosén |
author_sort |
L. Cunningham |
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://doi.org/10.5194/cp-9-679-2013 http://www.clim-past.net/9/679/2013/cp-9-679-2013.pdf https://doaj.org/article/406149dcaa3e4409a12b9745efc6bed1 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Climate of the Past, Vol 9, Iss 2, Pp 679-686 (2013) |
op_relation |
doi:10.5194/cp-9-679-2013 1814-9324 1814-9332 http://www.clim-past.net/9/679/2013/cp-9-679-2013.pdf https://doaj.org/article/406149dcaa3e4409a12b9745efc6bed1 |
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undefined |
op_doi |
https://doi.org/10.5194/cp-9-679-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
679 |
op_container_end_page |
686 |
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