Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics
The Black Sea experienced pronounced millennial-scale changes in temperature and rainfall during the last glacial coinciding with Dansgaard-Oeschger cycles. However, little is known regarding the amount and sources of freshwater reaching this inland basin. Here, we present detailed ostracod δ18O dat...
Published in: | Communications Earth & Environment |
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2021
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5006285 2023-05-15T16:40:28+02:00 Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics Wegwerth, A. Plessen, B. Kleinhanns, I. Arz, H. 2021 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285_1/component/file_5006299/5006285.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-021-00129-3 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285_1/component/file_5006299/5006285.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Communications Earth & Environment info:eu-repo/semantics/article 2021 ftgfzpotsdam https://doi.org/10.1038/s43247-021-00129-3 2022-09-14T05:57:59Z The Black Sea experienced pronounced millennial-scale changes in temperature and rainfall during the last glacial coinciding with Dansgaard-Oeschger cycles. However, little is known regarding the amount and sources of freshwater reaching this inland basin. Here, we present detailed ostracod δ18O data from the glacial Black Sea showing subdued Dansgaard-Oeschger cyclicity and four prominent longer-term saw-tooth shaped Bond-like cycles. We propose that the δ18Oostracods signature primarily reflects changes in the atmospheric circulation in response to the waxing and waning Eurasian Ice Sheet. The millennial-scale ice sheet variations likely resulted not only in latitudinal migrations of atmospheric frontal systems but also in shifts of dominant moisture sources for the Black Sea. Heavier isotopic precipitation arrived from the North Atlantic-Mediterranean realm during the warmer interstadials and lighter isotopic precipitation from the Eurasian continental interior during the colder stadials. The subdued Dansgaard-Oeschger variability likely reflects an integrated precipitation signal additionally affected by the long mixing times of the large Black Sea volume up to 1,500 years as suggested from hydrologic-isotope-balance modelling. Article in Journal/Newspaper Ice Sheet North Atlantic GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Communications Earth & Environment 2 1 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
The Black Sea experienced pronounced millennial-scale changes in temperature and rainfall during the last glacial coinciding with Dansgaard-Oeschger cycles. However, little is known regarding the amount and sources of freshwater reaching this inland basin. Here, we present detailed ostracod δ18O data from the glacial Black Sea showing subdued Dansgaard-Oeschger cyclicity and four prominent longer-term saw-tooth shaped Bond-like cycles. We propose that the δ18Oostracods signature primarily reflects changes in the atmospheric circulation in response to the waxing and waning Eurasian Ice Sheet. The millennial-scale ice sheet variations likely resulted not only in latitudinal migrations of atmospheric frontal systems but also in shifts of dominant moisture sources for the Black Sea. Heavier isotopic precipitation arrived from the North Atlantic-Mediterranean realm during the warmer interstadials and lighter isotopic precipitation from the Eurasian continental interior during the colder stadials. The subdued Dansgaard-Oeschger variability likely reflects an integrated precipitation signal additionally affected by the long mixing times of the large Black Sea volume up to 1,500 years as suggested from hydrologic-isotope-balance modelling. |
format |
Article in Journal/Newspaper |
author |
Wegwerth, A. Plessen, B. Kleinhanns, I. Arz, H. |
spellingShingle |
Wegwerth, A. Plessen, B. Kleinhanns, I. Arz, H. Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
author_facet |
Wegwerth, A. Plessen, B. Kleinhanns, I. Arz, H. |
author_sort |
Wegwerth, A. |
title |
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
title_short |
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
title_full |
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
title_fullStr |
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
title_full_unstemmed |
Black Sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
title_sort |
black sea hydroclimate and coupled hydrology was strongly controlled by high-latitude glacial climate dynamics |
publishDate |
2021 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285_1/component/file_5006299/5006285.pdf |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
Communications Earth & Environment |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-021-00129-3 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5006285_1/component/file_5006299/5006285.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-021-00129-3 |
container_title |
Communications Earth & Environment |
container_volume |
2 |
container_issue |
1 |
_version_ |
1766030868867973120 |