Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments
Landscapes in high northern latitudes are assumed to be highly sensitive to future global change, but the rates and long-term trajectories of changes are rather uncertain. In the boreal zone, fires are an important factor in climate–vegetation interactions and biogeochemical cycles. Fire regimes are...
Published in: | Climate of the Past |
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Copernicus Publications
2020
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Online Access: | https://doi.org/10.5194/cp-16-799-2020 https://www.clim-past.net/16/799/2020/cp-16-799-2020.pdf https://doaj.org/article/ecc88f2ef604470cbcae1a6830cebc8a |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ecc88f2ef604470cbcae1a6830cebc8a 2023-05-15T18:40:40+02:00 Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments E. Dietze K. Mangelsdorf A. Andreev C. Karger L. T. Schreuder E. C. Hopmans O. Rach D. Sachse V. Wennrich U. Herzschuh 2020-04-01 https://doi.org/10.5194/cp-16-799-2020 https://www.clim-past.net/16/799/2020/cp-16-799-2020.pdf https://doaj.org/article/ecc88f2ef604470cbcae1a6830cebc8a en eng Copernicus Publications doi:10.5194/cp-16-799-2020 1814-9324 1814-9332 https://www.clim-past.net/16/799/2020/cp-16-799-2020.pdf https://doaj.org/article/ecc88f2ef604470cbcae1a6830cebc8a undefined Climate of the Past, Vol 16, Pp 799-818 (2020) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/cp-16-799-2020 2023-01-22T18:03:49Z Landscapes in high northern latitudes are assumed to be highly sensitive to future global change, but the rates and long-term trajectories of changes are rather uncertain. In the boreal zone, fires are an important factor in climate–vegetation interactions and biogeochemical cycles. Fire regimes are characterized by small, frequent, low-intensity fires within summergreen boreal forests dominated by larch, whereas evergreen boreal forests dominated by spruce and pine burn large areas less frequently but at higher intensities. Here, we explore the potential of the monosaccharide anhydrides (MA) levoglucosan, mannosan and galactosan to serve as proxies of low-intensity biomass burning in glacial-to-interglacial lake sediments from the high northern latitudes. We use sediments from Lake El'gygytgyn (cores PG 1351 and ICDP 5011-1), located in the far north-east of Russia, and study glacial and interglacial samples of the last 430 kyr (marine isotope stages 5e, 6, 7e, 8, 11c and 12) that had different climate and biome configurations. Combined with pollen and non-pollen palynomorph records from the same samples, we assess how far the modern relationships between fire, climate and vegetation persisted during the past, on orbital to centennial timescales. We find that MAs attached to particulates were well-preserved in up to 430 kyr old sediments with higher influxes from low-intensity biomass burning in interglacials compared to glacials. MA influxes significantly increase when summergreen boreal forest spreads closer to the lake, whereas they decrease when tundra-steppe environments and, especially, Sphagnum peatlands spread. This suggests that low-temperature fires are a typical characteristic of Siberian larch forests also on long timescales. The results also suggest that low-intensity fires would be reduced by vegetation shifts towards very dry environments due to reduced biomass availability, as well as by shifts towards peatlands, which limits fuel dryness. In addition, we observed very low MA ratios, which we ... Article in Journal/Newspaper Tundra Siberia Unknown Climate of the Past 16 2 799 818 |
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envir geo |
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envir geo E. Dietze K. Mangelsdorf A. Andreev C. Karger L. T. Schreuder E. C. Hopmans O. Rach D. Sachse V. Wennrich U. Herzschuh Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
topic_facet |
envir geo |
description |
Landscapes in high northern latitudes are assumed to be highly sensitive to future global change, but the rates and long-term trajectories of changes are rather uncertain. In the boreal zone, fires are an important factor in climate–vegetation interactions and biogeochemical cycles. Fire regimes are characterized by small, frequent, low-intensity fires within summergreen boreal forests dominated by larch, whereas evergreen boreal forests dominated by spruce and pine burn large areas less frequently but at higher intensities. Here, we explore the potential of the monosaccharide anhydrides (MA) levoglucosan, mannosan and galactosan to serve as proxies of low-intensity biomass burning in glacial-to-interglacial lake sediments from the high northern latitudes. We use sediments from Lake El'gygytgyn (cores PG 1351 and ICDP 5011-1), located in the far north-east of Russia, and study glacial and interglacial samples of the last 430 kyr (marine isotope stages 5e, 6, 7e, 8, 11c and 12) that had different climate and biome configurations. Combined with pollen and non-pollen palynomorph records from the same samples, we assess how far the modern relationships between fire, climate and vegetation persisted during the past, on orbital to centennial timescales. We find that MAs attached to particulates were well-preserved in up to 430 kyr old sediments with higher influxes from low-intensity biomass burning in interglacials compared to glacials. MA influxes significantly increase when summergreen boreal forest spreads closer to the lake, whereas they decrease when tundra-steppe environments and, especially, Sphagnum peatlands spread. This suggests that low-temperature fires are a typical characteristic of Siberian larch forests also on long timescales. The results also suggest that low-intensity fires would be reduced by vegetation shifts towards very dry environments due to reduced biomass availability, as well as by shifts towards peatlands, which limits fuel dryness. In addition, we observed very low MA ratios, which we ... |
format |
Article in Journal/Newspaper |
author |
E. Dietze K. Mangelsdorf A. Andreev C. Karger L. T. Schreuder E. C. Hopmans O. Rach D. Sachse V. Wennrich U. Herzschuh |
author_facet |
E. Dietze K. Mangelsdorf A. Andreev C. Karger L. T. Schreuder E. C. Hopmans O. Rach D. Sachse V. Wennrich U. Herzschuh |
author_sort |
E. Dietze |
title |
Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
title_short |
Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
title_full |
Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
title_fullStr |
Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
title_full_unstemmed |
Relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern Siberia reconstructed from monosaccharide anhydrides in Lake El'gygytgyn sediments |
title_sort |
relationships between low-temperature fires, climate and vegetation during three late glacials and interglacials of the last 430 kyr in northeastern siberia reconstructed from monosaccharide anhydrides in lake el'gygytgyn sediments |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-799-2020 https://www.clim-past.net/16/799/2020/cp-16-799-2020.pdf https://doaj.org/article/ecc88f2ef604470cbcae1a6830cebc8a |
genre |
Tundra Siberia |
genre_facet |
Tundra Siberia |
op_source |
Climate of the Past, Vol 16, Pp 799-818 (2020) |
op_relation |
doi:10.5194/cp-16-799-2020 1814-9324 1814-9332 https://www.clim-past.net/16/799/2020/cp-16-799-2020.pdf https://doaj.org/article/ecc88f2ef604470cbcae1a6830cebc8a |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-16-799-2020 |
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Climate of the Past |
container_volume |
16 |
container_issue |
2 |
container_start_page |
799 |
op_container_end_page |
818 |
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