Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses
Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim of this paper is to provide the first reconstruction of accumulation rates, sediment and carbon bud...
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Copernicus Publications
2021
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ftdoajarticles:oai:doaj.org/article:3c508d1c68114e8eb693fe8f51120afa 2023-05-15T14:56:53+02:00 Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses S. A. Vyse U. Herzschuh G. Pfalz L. A. Pestryakova B. Diekmann N. Nowaczyk B. K. Biskaborn 2021-08-01T00:00:00Z https://doi.org/10.5194/bg-18-4791-2021 https://doaj.org/article/3c508d1c68114e8eb693fe8f51120afa EN eng Copernicus Publications https://bg.copernicus.org/articles/18/4791/2021/bg-18-4791-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-4791-2021 1726-4170 1726-4189 https://doaj.org/article/3c508d1c68114e8eb693fe8f51120afa Biogeosciences, Vol 18, Pp 4791-4816 (2021) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/bg-18-4791-2021 2022-12-31T12:53:41Z Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim of this paper is to provide the first reconstruction of accumulation rates, sediment and carbon budgets from a lacustrine sediment core from Lake Rauchuagytgyn, Chukotka (Arctic Siberia). We combined multiple sediment biogeochemical and sedimentological parameters from a radiocarbon-dated 6.5 m sediment core with lake basin hydroacoustic data to derive sediment stratigraphy, sediment volumes and infill budgets. Our results distinguished three principal sediment and carbon accumulation regimes that could be identified across all measured environmental proxies including early Marine Isotope Stage 2 (MIS2) (ca. 29–23.4 ka cal BP), mid-MIS2–early MIS1 (ca. 23.4–11.69 ka cal BP) and the Holocene (ca. 11.69–present). Estimated organic carbon accumulation rates (OCARs) were higher within Holocene sediments (average 3.53 g OC m −2 a −1 ) than Pleistocene sediments (average 1.08 g OC m −2 a −1 ) and are similar to those calculated for boreal lakes from Quebec and Finland and Lake Baikal but significantly lower than Siberian thermokarst lakes and Alberta glacial lakes. Using a bootstrapping approach, we estimated the total organic carbon pool to be 0.26 ± 0.02 Mt and a total sediment pool of 25.7 ± 1.71 Mt within a hydroacoustically derived sediment volume of ca. 32 990 557 m 3 . The total organic carbon pool is substantially smaller than Alaskan yedoma, thermokarst lake sediments and Alberta glacial lakes but shares similarities with Finnish boreal lakes. Temporal variability in sediment and carbon accumulation dynamics at Lake Rauchuagytgyn is controlled predominantly by palaeoclimate variation that regulates lake ice-cover dynamics and catchment glacial, fluvial and permafrost processes through time. These processes, in turn, affect catchment and within-lake primary productivity as well as catchment soil development. ... Article in Journal/Newspaper Arctic Chukotka Ice permafrost Thermokarst Siberia Directory of Open Access Journals: DOAJ Articles Arctic Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Biogeosciences 18 16 4791 4816 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. A. Vyse U. Herzschuh G. Pfalz L. A. Pestryakova B. Diekmann N. Nowaczyk B. K. Biskaborn Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim of this paper is to provide the first reconstruction of accumulation rates, sediment and carbon budgets from a lacustrine sediment core from Lake Rauchuagytgyn, Chukotka (Arctic Siberia). We combined multiple sediment biogeochemical and sedimentological parameters from a radiocarbon-dated 6.5 m sediment core with lake basin hydroacoustic data to derive sediment stratigraphy, sediment volumes and infill budgets. Our results distinguished three principal sediment and carbon accumulation regimes that could be identified across all measured environmental proxies including early Marine Isotope Stage 2 (MIS2) (ca. 29–23.4 ka cal BP), mid-MIS2–early MIS1 (ca. 23.4–11.69 ka cal BP) and the Holocene (ca. 11.69–present). Estimated organic carbon accumulation rates (OCARs) were higher within Holocene sediments (average 3.53 g OC m −2 a −1 ) than Pleistocene sediments (average 1.08 g OC m −2 a −1 ) and are similar to those calculated for boreal lakes from Quebec and Finland and Lake Baikal but significantly lower than Siberian thermokarst lakes and Alberta glacial lakes. Using a bootstrapping approach, we estimated the total organic carbon pool to be 0.26 ± 0.02 Mt and a total sediment pool of 25.7 ± 1.71 Mt within a hydroacoustically derived sediment volume of ca. 32 990 557 m 3 . The total organic carbon pool is substantially smaller than Alaskan yedoma, thermokarst lake sediments and Alberta glacial lakes but shares similarities with Finnish boreal lakes. Temporal variability in sediment and carbon accumulation dynamics at Lake Rauchuagytgyn is controlled predominantly by palaeoclimate variation that regulates lake ice-cover dynamics and catchment glacial, fluvial and permafrost processes through time. These processes, in turn, affect catchment and within-lake primary productivity as well as catchment soil development. ... |
format |
Article in Journal/Newspaper |
author |
S. A. Vyse U. Herzschuh G. Pfalz L. A. Pestryakova B. Diekmann N. Nowaczyk B. K. Biskaborn |
author_facet |
S. A. Vyse U. Herzschuh G. Pfalz L. A. Pestryakova B. Diekmann N. Nowaczyk B. K. Biskaborn |
author_sort |
S. A. Vyse |
title |
Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
title_short |
Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
title_full |
Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
title_fullStr |
Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
title_full_unstemmed |
Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses |
title_sort |
sediment and carbon accumulation in a glacial lake in chukotka (arctic siberia) during the late pleistocene and holocene: combining hydroacoustic profiling and down-core analyses |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-4791-2021 https://doaj.org/article/3c508d1c68114e8eb693fe8f51120afa |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Arctic Glacial Lake |
geographic_facet |
Arctic Glacial Lake |
genre |
Arctic Chukotka Ice permafrost Thermokarst Siberia |
genre_facet |
Arctic Chukotka Ice permafrost Thermokarst Siberia |
op_source |
Biogeosciences, Vol 18, Pp 4791-4816 (2021) |
op_relation |
https://bg.copernicus.org/articles/18/4791/2021/bg-18-4791-2021.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-18-4791-2021 1726-4170 1726-4189 https://doaj.org/article/3c508d1c68114e8eb693fe8f51120afa |
op_doi |
https://doi.org/10.5194/bg-18-4791-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
16 |
container_start_page |
4791 |
op_container_end_page |
4816 |
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1766328944178495488 |