Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria
Abstract Isotope-based records provide valuable information on past climate changes. However, it is not always trivial to disentangle past changes in the isotopic composition of precipitation from possible changes in evaporative enrichment, and seasonality may need to be considered. Here, we analyze...
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ftdoajarticles:oai:doaj.org/article:666b7a5408c94ae58bcd5551aa6f651f 2023-12-03T10:23:33+01:00 Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria Maximilian Prochnow Paul Strobel Marcel Bliedtner Julian Struck Lucas Bittner Sönke Szidat Gary Salazar Heike Schneider Sudip Acharya Michael Zech Roland Zech 2023-10-01T00:00:00Z https://doi.org/10.1038/s41598-023-45754-4 https://doaj.org/article/666b7a5408c94ae58bcd5551aa6f651f EN eng Nature Portfolio https://doi.org/10.1038/s41598-023-45754-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-45754-4 2045-2322 https://doaj.org/article/666b7a5408c94ae58bcd5551aa6f651f Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023) Medicine R Science Q article 2023 ftdoajarticles https://doi.org/10.1038/s41598-023-45754-4 2023-11-05T01:44:13Z Abstract Isotope-based records provide valuable information on past climate changes. However, it is not always trivial to disentangle past changes in the isotopic composition of precipitation from possible changes in evaporative enrichment, and seasonality may need to be considered. Here, we analyzed δ2H on n-alkanes and δ18O on hemicellulose sugars in sediments from Bichlersee, Bavaria, covering the Late Glacial and Early Holocene. Our δ2H n-C31 record documents past changes in the isotopic composition of summer precipitation and roughly shows the isotope pattern known from Greenland. Both records show lower values during the Younger Dryas, but at Bichlersee the signal is less pronounced, corroborating earlier suggestions that the Younger Dryas was mainly a winter phenomenon and less extreme during summer. δ18Ofucose records the isotopic composition of the lake water during summer and is sensitive to evaporative enrichment. Coupling δ2H n-C31 and δ18Ofucose allows calculating lake water deuterium-excess and thus disentangling changes in the isotopic composition of precipitation and evaporative enrichment. Our deuterium-excess record reveals that the warm Bølling–Allerød and Early Holocene were characterized by more evaporative enrichment compared to the colder Younger Dryas. Site-specific hydrological conditions, seasonality, and coupling δ2H and δ18O are thus important when interpreting isotope records. Article in Journal/Newspaper Greenland Directory of Open Access Journals: DOAJ Articles Greenland Scientific Reports 13 1 |
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Medicine R Science Q |
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Medicine R Science Q Maximilian Prochnow Paul Strobel Marcel Bliedtner Julian Struck Lucas Bittner Sönke Szidat Gary Salazar Heike Schneider Sudip Acharya Michael Zech Roland Zech Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
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Medicine R Science Q |
description |
Abstract Isotope-based records provide valuable information on past climate changes. However, it is not always trivial to disentangle past changes in the isotopic composition of precipitation from possible changes in evaporative enrichment, and seasonality may need to be considered. Here, we analyzed δ2H on n-alkanes and δ18O on hemicellulose sugars in sediments from Bichlersee, Bavaria, covering the Late Glacial and Early Holocene. Our δ2H n-C31 record documents past changes in the isotopic composition of summer precipitation and roughly shows the isotope pattern known from Greenland. Both records show lower values during the Younger Dryas, but at Bichlersee the signal is less pronounced, corroborating earlier suggestions that the Younger Dryas was mainly a winter phenomenon and less extreme during summer. δ18Ofucose records the isotopic composition of the lake water during summer and is sensitive to evaporative enrichment. Coupling δ2H n-C31 and δ18Ofucose allows calculating lake water deuterium-excess and thus disentangling changes in the isotopic composition of precipitation and evaporative enrichment. Our deuterium-excess record reveals that the warm Bølling–Allerød and Early Holocene were characterized by more evaporative enrichment compared to the colder Younger Dryas. Site-specific hydrological conditions, seasonality, and coupling δ2H and δ18O are thus important when interpreting isotope records. |
format |
Article in Journal/Newspaper |
author |
Maximilian Prochnow Paul Strobel Marcel Bliedtner Julian Struck Lucas Bittner Sönke Szidat Gary Salazar Heike Schneider Sudip Acharya Michael Zech Roland Zech |
author_facet |
Maximilian Prochnow Paul Strobel Marcel Bliedtner Julian Struck Lucas Bittner Sönke Szidat Gary Salazar Heike Schneider Sudip Acharya Michael Zech Roland Zech |
author_sort |
Maximilian Prochnow |
title |
Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
title_short |
Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
title_full |
Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
title_fullStr |
Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
title_full_unstemmed |
Summer paleohydrology during the Late Glacial and Early Holocene based on δ2H and δ18O from Bichlersee, Bavaria |
title_sort |
summer paleohydrology during the late glacial and early holocene based on δ2h and δ18o from bichlersee, bavaria |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s41598-023-45754-4 https://doaj.org/article/666b7a5408c94ae58bcd5551aa6f651f |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023) |
op_relation |
https://doi.org/10.1038/s41598-023-45754-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-023-45754-4 2045-2322 https://doaj.org/article/666b7a5408c94ae58bcd5551aa6f651f |
op_doi |
https://doi.org/10.1038/s41598-023-45754-4 |
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Scientific Reports |
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13 |
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