Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability
© 2015 Elsevier Ltd. Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geoche...
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ftkazanuniv:oai:dspace.kpfu.ru:net/101587 2023-05-15T16:41:29+02:00 Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability Biskaborn B. Subetto D. Savelieva L. Vakhrameeva P. Hansche A. Herzschuh U. Klemm J. Heinecke L. Pestryakova L. Meyer H. Kuhn G. Diekmann B. 2015 http://dspace.kpfu.ru/xmlui/handle/net/101587 unknown Quaternary Science Reviews http://dspace.kpfu.ru/xmlui/bitstream/net/101587/1/SCOPUS02773791-2015-SID84940781735-p1.pdf 0277-3791 http://dspace.kpfu.ru/xmlui/handle/net/101587 SCOPUS02773791-2015-SID84940781735 Aquatic and terrestrial ecosystems Diatoms Holocene Thermal Maximum Lake-ice cover Pollen Summer and winter temperature Article in Press 2015 ftkazanuniv 2022-01-01T09:35:22Z © 2015 Elsevier Ltd. Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geochemistry, and diatom and pollen data from lake-sediment cores covering the last 38,000cal. years. Our results show major changes in pyrite content and fragilarioid diatom species distributions, indicating prolonged seasonal lake-ice cover between ~13,500 and ~8900cal. years BP and possibly during the 8200cal. years BP cold event. A pollen-based climate reconstruction generated a mean July temperature of 17.8°C during the Holocene Thermal Maximum (HTM) between ~8900 and ~4500cal. years BP. Naviculoid diatoms appear in the late Holocene indicating a shortening of the seasonal ice cover that continues today. Our results reveal a strong correlation between the applied terrestrial and aquatic indicators and natural seasonal climate dynamics in the Holocene. Planktonic diatoms show a strong response to changes in the lake ecosystem due to recent climate warming in the Anthropocene.We assess other palaeolimnological studies to infer the spatiotemporal pattern of the HTM and affirm that the timing of its onset, a difference of up to 3000 years from north to south, can be well explained by climatic teleconnections. The westerlies brought cold air to this part of Siberia until the Laurentide ice-sheet vanished 7000 years ago. The apparent delayed ending of the HTM in the central Siberian record can be ascribed to the exceedance of ecological thresholds trailing behind increases in winter temperatures and decreases in contrast in insolation between seasons during the mid to late Holocene as well as lacking differentiation between summer and winter trends in paleolimnological reconstructions. Other/Unknown Material Ice Sheet Siberia Kazan Federal University Digital Repository |
institution |
Open Polar |
collection |
Kazan Federal University Digital Repository |
op_collection_id |
ftkazanuniv |
language |
unknown |
topic |
Aquatic and terrestrial ecosystems Diatoms Holocene Thermal Maximum Lake-ice cover Pollen Summer and winter temperature |
spellingShingle |
Aquatic and terrestrial ecosystems Diatoms Holocene Thermal Maximum Lake-ice cover Pollen Summer and winter temperature Biskaborn B. Subetto D. Savelieva L. Vakhrameeva P. Hansche A. Herzschuh U. Klemm J. Heinecke L. Pestryakova L. Meyer H. Kuhn G. Diekmann B. Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
topic_facet |
Aquatic and terrestrial ecosystems Diatoms Holocene Thermal Maximum Lake-ice cover Pollen Summer and winter temperature |
description |
© 2015 Elsevier Ltd. Although the climate development over the Holocene in the Northern Hemisphere is well known, palaeolimnological climate reconstructions reveal spatiotemporal variability in northern Eurasia. Here we present a multi-proxy study from north-eastern Siberia combining sediment geochemistry, and diatom and pollen data from lake-sediment cores covering the last 38,000cal. years. Our results show major changes in pyrite content and fragilarioid diatom species distributions, indicating prolonged seasonal lake-ice cover between ~13,500 and ~8900cal. years BP and possibly during the 8200cal. years BP cold event. A pollen-based climate reconstruction generated a mean July temperature of 17.8°C during the Holocene Thermal Maximum (HTM) between ~8900 and ~4500cal. years BP. Naviculoid diatoms appear in the late Holocene indicating a shortening of the seasonal ice cover that continues today. Our results reveal a strong correlation between the applied terrestrial and aquatic indicators and natural seasonal climate dynamics in the Holocene. Planktonic diatoms show a strong response to changes in the lake ecosystem due to recent climate warming in the Anthropocene.We assess other palaeolimnological studies to infer the spatiotemporal pattern of the HTM and affirm that the timing of its onset, a difference of up to 3000 years from north to south, can be well explained by climatic teleconnections. The westerlies brought cold air to this part of Siberia until the Laurentide ice-sheet vanished 7000 years ago. The apparent delayed ending of the HTM in the central Siberian record can be ascribed to the exceedance of ecological thresholds trailing behind increases in winter temperatures and decreases in contrast in insolation between seasons during the mid to late Holocene as well as lacking differentiation between summer and winter trends in paleolimnological reconstructions. |
format |
Other/Unknown Material |
author |
Biskaborn B. Subetto D. Savelieva L. Vakhrameeva P. Hansche A. Herzschuh U. Klemm J. Heinecke L. Pestryakova L. Meyer H. Kuhn G. Diekmann B. |
author_facet |
Biskaborn B. Subetto D. Savelieva L. Vakhrameeva P. Hansche A. Herzschuh U. Klemm J. Heinecke L. Pestryakova L. Meyer H. Kuhn G. Diekmann B. |
author_sort |
Biskaborn B. |
title |
Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
title_short |
Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
title_full |
Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
title_fullStr |
Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
title_full_unstemmed |
Late Quaternary vegetation and lake system dynamics in north-eastern Siberia: Implications for seasonal climate variability |
title_sort |
late quaternary vegetation and lake system dynamics in north-eastern siberia: implications for seasonal climate variability |
publishDate |
2015 |
url |
http://dspace.kpfu.ru/xmlui/handle/net/101587 |
genre |
Ice Sheet Siberia |
genre_facet |
Ice Sheet Siberia |
op_source |
SCOPUS02773791-2015-SID84940781735 |
op_relation |
Quaternary Science Reviews http://dspace.kpfu.ru/xmlui/bitstream/net/101587/1/SCOPUS02773791-2015-SID84940781735-p1.pdf 0277-3791 http://dspace.kpfu.ru/xmlui/handle/net/101587 |
_version_ |
1766031922770739200 |