Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea
Acknowledgements: We sincerely thank the professional support of the captain and crew of the R/V Maria S. Merian as well as the scientific team on the expedition MSM12/2. We also thank W. Luttmer for technical assistance with the measurement at AWI. Many thanks to G. Mollenhauer, the AWI MICADAS lab...
Main Authors: | , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2023
|
Subjects: | |
Online Access: | https://www.repository.cam.ac.uk/handle/1810/347686 https://doi.org/10.17863/CAM.95100 |
id |
ftunivcam:oai:www.repository.cam.ac.uk:1810/347686 |
---|---|
record_format |
openpolar |
spelling |
ftunivcam:oai:www.repository.cam.ac.uk:1810/347686 2024-02-04T10:00:55+01:00 Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea You, D Stein, R Fahl, K Williams, MC Schmidt, DN McCave, IN Barker, S Schefuß, E Niu, L Kuhn, G Niessen, F 2023-03-17T16:00:36Z application/pdf text/xml https://www.repository.cam.ac.uk/handle/1810/347686 https://doi.org/10.17863/CAM.95100 en eng eng Springer Science and Business Media LLC http://dx.doi.org/10.1038/s43247-023-00743-3 Communications Earth and Environment https://www.repository.cam.ac.uk/handle/1810/347686 doi:10.17863/CAM.95100 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action 14 Life Below Water Article 2023 ftunivcam https://doi.org/10.17863/CAM.95100 2024-01-11T23:24:25Z Acknowledgements: We sincerely thank the professional support of the captain and crew of the R/V Maria S. Merian as well as the scientific team on the expedition MSM12/2. We also thank W. Luttmer for technical assistance with the measurement at AWI. Many thanks to G. Mollenhauer, the AWI MICADAS lab, and S. Morton (SUERC) for radiocarbon measurement. Thanks to C. Vogt for XRD analysis. This project was supported by the Deutsche Forschungsgemeinschaft (DFG) through the International Research Training Group IRTG 1904 ArcTrain. Grant NE/I020261/1 from NERC in the ocean acidification program to D.N.S. is also gratefully acknowledged. Furthermore, we acknowledge support by the Open Access Publication Funds of AWI. Funder: Deutsche Forschungsgemeinschaft through "ArcTrain" (GRK1904) <jats:title>Abstract</jats:title><jats:p>Freshwater perturbations are often thought to be associated with abrupt climate changes during the last deglaciation, while many uncertainties remain regarding the exact timing, pathway, mechanism, and influence of meltwater release. Here, we present very well-dated and high-resolution records from the eastern Labrador Sea representing the last 19.000 years, which demonstrate abrupt changes in sea surface characteristics. Four millennial-scale meltwater events have been identified between the last 14.000 and 8.200 years based on independent biomarker proxies and X-ray fluorescence scanning data. These events are characterized by increased sea ice formation and decreased sea surface temperatures which might have occurred within a few decades. We propose these abrupt changes were triggered by meltwater pulsing into the Labrador Sea periodically, resulting from collapse of the Laurentide-Greenland Ice Sheets caused by (sub-)surface ocean warming in the Labrador Sea. Our findings provide more precise information about impact of freshwater forcing on abrupt climate changes, which may help to improve simulations for past and future changes in ocean circulation and ... Article in Journal/Newspaper Greenland Labrador Sea Ocean acidification Sea ice Apollo - University of Cambridge Repository Greenland Morton ENVELOPE(-61.220,-61.220,-62.697,-62.697) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action 14 Life Below Water |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action 14 Life Below Water You, D Stein, R Fahl, K Williams, MC Schmidt, DN McCave, IN Barker, S Schefuß, E Niu, L Kuhn, G Niessen, F Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action 14 Life Below Water |
description |
Acknowledgements: We sincerely thank the professional support of the captain and crew of the R/V Maria S. Merian as well as the scientific team on the expedition MSM12/2. We also thank W. Luttmer for technical assistance with the measurement at AWI. Many thanks to G. Mollenhauer, the AWI MICADAS lab, and S. Morton (SUERC) for radiocarbon measurement. Thanks to C. Vogt for XRD analysis. This project was supported by the Deutsche Forschungsgemeinschaft (DFG) through the International Research Training Group IRTG 1904 ArcTrain. Grant NE/I020261/1 from NERC in the ocean acidification program to D.N.S. is also gratefully acknowledged. Furthermore, we acknowledge support by the Open Access Publication Funds of AWI. Funder: Deutsche Forschungsgemeinschaft through "ArcTrain" (GRK1904) <jats:title>Abstract</jats:title><jats:p>Freshwater perturbations are often thought to be associated with abrupt climate changes during the last deglaciation, while many uncertainties remain regarding the exact timing, pathway, mechanism, and influence of meltwater release. Here, we present very well-dated and high-resolution records from the eastern Labrador Sea representing the last 19.000 years, which demonstrate abrupt changes in sea surface characteristics. Four millennial-scale meltwater events have been identified between the last 14.000 and 8.200 years based on independent biomarker proxies and X-ray fluorescence scanning data. These events are characterized by increased sea ice formation and decreased sea surface temperatures which might have occurred within a few decades. We propose these abrupt changes were triggered by meltwater pulsing into the Labrador Sea periodically, resulting from collapse of the Laurentide-Greenland Ice Sheets caused by (sub-)surface ocean warming in the Labrador Sea. Our findings provide more precise information about impact of freshwater forcing on abrupt climate changes, which may help to improve simulations for past and future changes in ocean circulation and ... |
format |
Article in Journal/Newspaper |
author |
You, D Stein, R Fahl, K Williams, MC Schmidt, DN McCave, IN Barker, S Schefuß, E Niu, L Kuhn, G Niessen, F |
author_facet |
You, D Stein, R Fahl, K Williams, MC Schmidt, DN McCave, IN Barker, S Schefuß, E Niu, L Kuhn, G Niessen, F |
author_sort |
You, D |
title |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_short |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_full |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_fullStr |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_full_unstemmed |
Last deglacial abrupt climate changes caused by meltwater pulses in the Labrador Sea |
title_sort |
last deglacial abrupt climate changes caused by meltwater pulses in the labrador sea |
publisher |
Springer Science and Business Media LLC |
publishDate |
2023 |
url |
https://www.repository.cam.ac.uk/handle/1810/347686 https://doi.org/10.17863/CAM.95100 |
long_lat |
ENVELOPE(-61.220,-61.220,-62.697,-62.697) |
geographic |
Greenland Morton |
geographic_facet |
Greenland Morton |
genre |
Greenland Labrador Sea Ocean acidification Sea ice |
genre_facet |
Greenland Labrador Sea Ocean acidification Sea ice |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/347686 doi:10.17863/CAM.95100 |
op_doi |
https://doi.org/10.17863/CAM.95100 |
_version_ |
1789966438796099584 |