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Journal Article

Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record

Authors

Czymzik,  Markus
External Organizations;

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Tjallingii,  Rik
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/birgit

Plessen,  Birgit
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Feldens,  Peter
External Organizations;

Theuerkauf,  Martin
External Organizations;

Moros,  Matthias
External Organizations;

/persons/resource/mschwab

Schwab,  M. J.
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Nantke,  Carla K. M.
External Organizations;

/persons/resource/sytopi

Pinkerneil,  Sylvia
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/brau

Brauer,  A.
4.3 Climate Dynamics and Landscape Evolution, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Arz,  Helge W.
External Organizations;

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Fulltext (public)

5015056.pdf
(Publisher version), 11MB

Supplementary Material (public)
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Citation

Czymzik, M., Tjallingii, R., Plessen, B., Feldens, P., Theuerkauf, M., Moros, M., Schwab, M. J., Nantke, C. K. M., Pinkerneil, S., Brauer, A., Arz, H. W. (2023): Mid-Holocene reinforcement of North Atlantic atmospheric circulation variability from a western Baltic lake sediment record. - Climate of the Past, 19, 1, 233-248.
https://doi.org/10.5194/cp-19-233-2023


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015056
Abstract
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 reect a reinforcement of NAO-like atmospheric circulation variability, possibly driven by more vigorous changes in North Atlantic deep-water formation.