Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record
Knowledge about the timing, amplitude and spatial gradients of Holocene environmental variability in the circum-Baltic region is key to understanding its responses to ongoing climate change. Based on a multi-dating and proxy approach, we reconstruct changes in productivity using total organic carbon...
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2023
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5015056 2023-05-15T17:25:26+02:00 Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record Czymzik, M. Tjallingii, R. Plessen, B. Feldens, P. Theuerkauf, M. Moros, M. Schwab, M. Nantke, C. Pinkerneil, S. Brauer, A. Arz, H. 2023 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056_1/component/file_5015087/5015056.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-19-233-2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056_1/component/file_5015087/5015056.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Climate of the Past info:eu-repo/semantics/article 2023 ftgfzpotsdam https://doi.org/10.5194/cp-19-233-2023 2023-01-30T00:33:07Z Knowledge about the timing, amplitude and spatial gradients of Holocene environmental variability in the circum-Baltic region is key to understanding its responses to ongoing climate change. Based on a multi-dating and proxy approach, we reconstruct changes in productivity using total organic carbon (TOC) contents in sediments of Lake Kälksjön (KKJ) from west–central Sweden spanning the last 9612 (+255 − 114) years. An exception is the period from 1878 CE until today, in which sedimentation was dominated by anthropogenic lake level lowering and land use. In-lake productivity was higher during periods of warmer winters with shortened ice cover and prolonged growing seasons. A multi-millennial increase in productivity throughout the last ∼ 9600 years is associated with progressively warmer winters in northwestern Europe, likely triggered by the coinciding increase in Northern Hemisphere winter insolation. Decadal to centennial periods of higher productivity in KKJ tend to correspond to warmer winters during a more positive North Atlantic Oscillation (NAO) polarity, as reconstructed for the last 8000 years. In consequence, we assume our decadal to centennial productivity record from KKJ sediments for the complete ∼ 9600 years to provide a qualitative record of NAO polarity. A shift towards higher productivity variability at ∼ 5450 cal a BP is hypothesized to reect a reinforcement of NAO-like atmospheric circulation variability, possibly driven by more vigorous changes in North Atlantic deep-water formation. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic North Atlantic oscillation GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Climate of the Past 19 1 233 248 |
institution |
Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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ftgfzpotsdam |
language |
unknown |
description |
Knowledge about the timing, amplitude and spatial gradients of Holocene environmental variability in the circum-Baltic region is key to understanding its responses to ongoing climate change. Based on a multi-dating and proxy approach, we reconstruct changes in productivity using total organic carbon (TOC) contents in sediments of Lake Kälksjön (KKJ) from west–central Sweden spanning the last 9612 (+255 − 114) years. An exception is the period from 1878 CE until today, in which sedimentation was dominated by anthropogenic lake level lowering and land use. In-lake productivity was higher during periods of warmer winters with shortened ice cover and prolonged growing seasons. A multi-millennial increase in productivity throughout the last ∼ 9600 years is associated with progressively warmer winters in northwestern Europe, likely triggered by the coinciding increase in Northern Hemisphere winter insolation. Decadal to centennial periods of higher productivity in KKJ tend to correspond to warmer winters during a more positive North Atlantic Oscillation (NAO) polarity, as reconstructed for the last 8000 years. In consequence, we assume our decadal to centennial productivity record from KKJ sediments for the complete ∼ 9600 years to provide a qualitative record of NAO polarity. A shift towards higher productivity variability at ∼ 5450 cal a BP is hypothesized to reect a reinforcement of NAO-like atmospheric circulation variability, possibly driven by more vigorous changes in North Atlantic deep-water formation. |
format |
Article in Journal/Newspaper |
author |
Czymzik, M. Tjallingii, R. Plessen, B. Feldens, P. Theuerkauf, M. Moros, M. Schwab, M. Nantke, C. Pinkerneil, S. Brauer, A. Arz, H. |
spellingShingle |
Czymzik, M. Tjallingii, R. Plessen, B. Feldens, P. Theuerkauf, M. Moros, M. Schwab, M. Nantke, C. Pinkerneil, S. Brauer, A. Arz, H. Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
author_facet |
Czymzik, M. Tjallingii, R. Plessen, B. Feldens, P. Theuerkauf, M. Moros, M. Schwab, M. Nantke, C. Pinkerneil, S. Brauer, A. Arz, H. |
author_sort |
Czymzik, M. |
title |
Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
title_short |
Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
title_full |
Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
title_fullStr |
Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
title_full_unstemmed |
Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
title_sort |
mid-holocene reinforcement of north atlantic atmospheric circulation variability from a western baltic lake sediment record |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056_1/component/file_5015087/5015056.pdf |
genre |
North Atlantic Deep Water North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic Deep Water North Atlantic North Atlantic oscillation |
op_source |
Climate of the Past |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-19-233-2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056_1/component/file_5015087/5015056.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-19-233-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
1 |
container_start_page |
233 |
op_container_end_page |
248 |
_version_ |
1766116861456416768 |