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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ftcopernicus:oai:publications.copernicus.org:cp104939 2023-05-15T17:31:32+02:00 Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record Czymzik, Markus Tjallingii, Rik Plessen, Birgit Feldens, Peter Theuerkauf, Martin Moros, Matthias Schwab, Markus J. Nantke, Carla K. M. Pinkerneil, Silvia Brauer, Achim Arz, Helge W. 2023-01-26 application/pdf https://doi.org/10.5194/cp-19-233-2023 https://cp.copernicus.org/articles/19/233/2023/ eng eng doi:10.5194/cp-19-233-2023 https://cp.copernicus.org/articles/19/233/2023/ eISSN: 1814-9332 Text 2023 ftcopernicus https://doi.org/10.5194/cp-19-233-2023 2023-01-30T17:22:42Z 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 ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>+</mo><mn mathvariant="normal">255</mn><mo>/</mo><mo>-</mo><mn mathvariant="normal">114</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="64pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="a3653381b53c4bc26b401e0834f2e355"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-19-233-2023-ie00001.svg" width="64pt" height="14pt" src="cp-19-233-2023-ie00001.png"/></svg:svg> ) 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 reflect a reinforcement of ... Text North Atlantic North Atlantic oscillation Copernicus Publications: E-Journals Climate of the Past 19 1 233 248 |
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Copernicus Publications: E-Journals |
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English |
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 ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>+</mo><mn mathvariant="normal">255</mn><mo>/</mo><mo>-</mo><mn mathvariant="normal">114</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="64pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="a3653381b53c4bc26b401e0834f2e355"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-19-233-2023-ie00001.svg" width="64pt" height="14pt" src="cp-19-233-2023-ie00001.png"/></svg:svg> ) 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 reflect a reinforcement of ... |
format |
Text |
author |
Czymzik, Markus Tjallingii, Rik Plessen, Birgit Feldens, Peter Theuerkauf, Martin Moros, Matthias Schwab, Markus J. Nantke, Carla K. M. Pinkerneil, Silvia Brauer, Achim Arz, Helge W. |
spellingShingle |
Czymzik, Markus Tjallingii, Rik Plessen, Birgit Feldens, Peter Theuerkauf, Martin Moros, Matthias Schwab, Markus J. Nantke, Carla K. M. Pinkerneil, Silvia Brauer, Achim Arz, Helge W. Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record |
author_facet |
Czymzik, Markus Tjallingii, Rik Plessen, Birgit Feldens, Peter Theuerkauf, Martin Moros, Matthias Schwab, Markus J. Nantke, Carla K. M. Pinkerneil, Silvia Brauer, Achim Arz, Helge W. |
author_sort |
Czymzik, Markus |
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://doi.org/10.5194/cp-19-233-2023 https://cp.copernicus.org/articles/19/233/2023/ |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-19-233-2023 https://cp.copernicus.org/articles/19/233/2023/ |
op_doi |
https://doi.org/10.5194/cp-19-233-2023 |
container_title |
Climate of the Past |
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19 |
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1 |
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233 |
op_container_end_page |
248 |
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1766129170955370496 |