Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia
The last deglaciation in northern Europe provides an opportunity to study the hydrologic component of abrupt climate shifts in a region with complex interactions between ice sheets and oceanic and atmospheric circulation. We use leaf wax hydrogen isotopes (δ2H) to reconstruct summer precipitation δ2...
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Online Access: | https://hdl.handle.net/11250/2765973 https://doi.org/10.1029/2020GL088153 |
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ftunivbergen:oai:bora.uib.no:11250/2765973 2023-05-15T17:27:43+02:00 Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia Cowling, Owen C. Thomas, Elizabeth K. Svendsen, John-Inge Mangerud, Jan Vasskog, Kristian Haflidason, Haflidi 2020 application/pdf https://hdl.handle.net/11250/2765973 https://doi.org/10.1029/2020GL088153 eng eng AGU urn:issn:0094-8276 https://hdl.handle.net/11250/2765973 https://doi.org/10.1029/2020GL088153 cristin:1854569 Geophysical Research Letters. 2020, 47(14):e2020GL088153 Copyright 2020. American Geophysical Union. All Rights Reserved. e2020GL088153 Geophysical Research Letters 47 14 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1029/2020GL088153 2023-03-14T17:44:12Z The last deglaciation in northern Europe provides an opportunity to study the hydrologic component of abrupt climate shifts in a region with complex interactions between ice sheets and oceanic and atmospheric circulation. We use leaf wax hydrogen isotopes (δ2H) to reconstruct summer precipitation δ2H and aridity in southwestern Norway from 15.8 to 11.5 ka. We identify transitions to a more proximal moisture source before the ends of Heinrich Stadial 1 and the Younger Dryas, prior to local warming and increased primary productivity in both instances. We infer these changes in moisture delivery to southwestern Norway to be a response to northward shifts in the polar front caused by warm water intrusion into the North Atlantic, which preceded abrupt warming in the circum-North Atlantic. These results suggest that moisture transport pathways shift northward as warm surface ocean water reaches higher latitudes in the North Atlantic. publishedVersion Article in Journal/Newspaper North Atlantic University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway Geophysical Research Letters 47 14 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The last deglaciation in northern Europe provides an opportunity to study the hydrologic component of abrupt climate shifts in a region with complex interactions between ice sheets and oceanic and atmospheric circulation. We use leaf wax hydrogen isotopes (δ2H) to reconstruct summer precipitation δ2H and aridity in southwestern Norway from 15.8 to 11.5 ka. We identify transitions to a more proximal moisture source before the ends of Heinrich Stadial 1 and the Younger Dryas, prior to local warming and increased primary productivity in both instances. We infer these changes in moisture delivery to southwestern Norway to be a response to northward shifts in the polar front caused by warm water intrusion into the North Atlantic, which preceded abrupt warming in the circum-North Atlantic. These results suggest that moisture transport pathways shift northward as warm surface ocean water reaches higher latitudes in the North Atlantic. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Cowling, Owen C. Thomas, Elizabeth K. Svendsen, John-Inge Mangerud, Jan Vasskog, Kristian Haflidason, Haflidi |
spellingShingle |
Cowling, Owen C. Thomas, Elizabeth K. Svendsen, John-Inge Mangerud, Jan Vasskog, Kristian Haflidason, Haflidi Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
author_facet |
Cowling, Owen C. Thomas, Elizabeth K. Svendsen, John-Inge Mangerud, Jan Vasskog, Kristian Haflidason, Haflidi |
author_sort |
Cowling, Owen C. |
title |
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
title_short |
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
title_full |
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
title_fullStr |
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
title_full_unstemmed |
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia |
title_sort |
northward shifts in the polar front preceded bølling and holocene warming in southwestern scandinavia |
publisher |
AGU |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2765973 https://doi.org/10.1029/2020GL088153 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
e2020GL088153 Geophysical Research Letters 47 14 |
op_relation |
urn:issn:0094-8276 https://hdl.handle.net/11250/2765973 https://doi.org/10.1029/2020GL088153 cristin:1854569 Geophysical Research Letters. 2020, 47(14):e2020GL088153 |
op_rights |
Copyright 2020. American Geophysical Union. All Rights Reserved. |
op_doi |
https://doi.org/10.1029/2020GL088153 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
14 |
_version_ |
1766120000156860416 |