Greenland ice core record of last glacial dust sources and atmospheric circulation
Abrupt and large-scale climate changes have occurred repeatedly and within decades during the last glaciation. These events, where dramatic warming occurs over decades, are well represented in both Greenland ice core mineral dust and temperature records, suggesting a causal link. However, the feedba...
Published in: | Journal of Geophysical Research: Atmospheres |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Uppsala universitet, Luft-, vatten- och landskapslära
2022
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Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-480797 https://doi.org/10.1029/2022jd036597 |
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ftuppsalauniv:oai:DiVA.org:uu-480797 |
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openpolar |
institution |
Open Polar |
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Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
Geosciences Multidisciplinary Multidisciplinär geovetenskap Újvári, G. Klötzli, U. Stevens, Thomas Svensson, A. Ludwig, P. Vennemann, T. Gier, S. Horschinegg, M. Palcsu, L. Hippler, D. Kovács, J. Di Biagio, C. Formenti, P. Greenland ice core record of last glacial dust sources and atmospheric circulation |
topic_facet |
Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
Abrupt and large-scale climate changes have occurred repeatedly and within decades during the last glaciation. These events, where dramatic warming occurs over decades, are well represented in both Greenland ice core mineral dust and temperature records, suggesting a causal link. However, the feedbacks between atmospheric dust and climate change during these Dansgaard–Oeschger events are poorly known and the processes driving changes in atmospheric dust emission and transport remain elusive. Constraining dust provenance is key to resolving these gaps. Here, we present a multi-technique analysis of Greenland dust provenance using novel and established, source diagnostic isotopic tracers as well as results from a regional climate model including dust cycle simulations. We show that the existing dominant model for the provenance of Greenland dust as sourced from combined East Asian dust and Pacific volcanics is not supported. Rather, our clay mineralogical and Hf–Sr–Nd and D/H isotopic analyses from last glacial Greenland dust and an extensive range of Northern Hemisphere potential dust sources reveal three most likely scenarios (in order of probability): direct dust sourcing from the Taklimakan Desert in western China, direct sourcing from European glacial sources, or a mix of dust originating from Europe and North Africa. Furthermore, our regional climate modeling demonstrates the plausibility of European or mixed European/North African sources for the first time. We suggest that the origin of dust to Greenland is potentially more complex than previously recognized, demonstrating more uncertainty in our understanding dust climate feedbacks during abrupt events than previously understood. |
format |
Article in Journal/Newspaper |
author |
Újvári, G. Klötzli, U. Stevens, Thomas Svensson, A. Ludwig, P. Vennemann, T. Gier, S. Horschinegg, M. Palcsu, L. Hippler, D. Kovács, J. Di Biagio, C. Formenti, P. |
author_facet |
Újvári, G. Klötzli, U. Stevens, Thomas Svensson, A. Ludwig, P. Vennemann, T. Gier, S. Horschinegg, M. Palcsu, L. Hippler, D. Kovács, J. Di Biagio, C. Formenti, P. |
author_sort |
Újvári, G. |
title |
Greenland ice core record of last glacial dust sources and atmospheric circulation |
title_short |
Greenland ice core record of last glacial dust sources and atmospheric circulation |
title_full |
Greenland ice core record of last glacial dust sources and atmospheric circulation |
title_fullStr |
Greenland ice core record of last glacial dust sources and atmospheric circulation |
title_full_unstemmed |
Greenland ice core record of last glacial dust sources and atmospheric circulation |
title_sort |
greenland ice core record of last glacial dust sources and atmospheric circulation |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-480797 https://doi.org/10.1029/2022jd036597 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Dansgaard-Oeschger events Greenland Greenland ice core ice core |
genre_facet |
Dansgaard-Oeschger events Greenland Greenland ice core ice core |
op_relation |
Journal of Geophysical Research - Atmospheres, 2169-897X, 2022 orcid:0000-0002-2816-6155 orcid:0000-0002-6662-6650 orcid:0000-0002-4364-6085 orcid:0000-0003-3655-7890 orcid:0000-0003-4061-0420 orcid:0000-0002-7926-7714 orcid:0000-0002-9543-0163 orcid:0000-0002-0372-1351 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-480797 doi:10.1029/2022jd036597 ISI:000838113400001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2022jd036597 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
127 |
container_issue |
15 |
_version_ |
1790599524879695872 |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-480797 2024-02-11T10:03:19+01:00 Greenland ice core record of last glacial dust sources and atmospheric circulation Újvári, G. Klötzli, U. Stevens, Thomas Svensson, A. Ludwig, P. Vennemann, T. Gier, S. Horschinegg, M. Palcsu, L. Hippler, D. Kovács, J. Di Biagio, C. Formenti, P. 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-480797 https://doi.org/10.1029/2022jd036597 eng eng Uppsala universitet, Luft-, vatten- och landskapslära Institute for Geological and Geochemical Research Centre for Astronomy and Earth Sciences Eötvös Loránd Research Network, Budaörsi út 45,1112 Budapest Hungary Budapest;CSFK MTA Centre of Excellence Konkoly Thege Miklós út 15‐17 1121 Budapest Hungary;Department of Lithospheric Research University of Vienna Althanstrasse 141090 Vienna Austria Department of Lithospheric Research University of Vienna Althanstrasse 141090 Vienna Austria Physics of Ice Climate and Earth Niels Bohr Institute University of Copenhagen Tagensvej 16 2200 Copenhagen Denmark Institute for Meteorology and Climate Research Karlsruhe Institute of Technology Wolfgang‐Gaede‐Strasse 176131 Karlsruhe Germany Institute of Earth Surface Dynamics University of Lausanne Géopolis 46341015 Lausanne Switzerland Department of Geology University of Vienna Althanstrasse 141090 Vienna Austria Isotope Climatology and Environmental Research Centre Institute for Nuclear Research Bem square 18/c 4026 Debrecen Hungary Institute of Applied Geosciences Graz University of Technology Rechbauerstrasse 128010 Graz Austria Environmental Analytical and Geoanalytical Research Group Szentágothai Research Centre University of Pécs Ifjúság u. 20 7624 Pécs Hungary Debrecen;Institute of Geography and Earth Sciences. University of Pécs Ifjúság u. 6., 7624Pécs Hungary Debrecen Université de Paris and Univ Paris Est Creteil CNRS LISA 75013 Paris France American Geophysical Union (AGU) Journal of Geophysical Research - Atmospheres, 2169-897X, 2022 orcid:0000-0002-2816-6155 orcid:0000-0002-6662-6650 orcid:0000-0002-4364-6085 orcid:0000-0003-3655-7890 orcid:0000-0003-4061-0420 orcid:0000-0002-7926-7714 orcid:0000-0002-9543-0163 orcid:0000-0002-0372-1351 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-480797 doi:10.1029/2022jd036597 ISI:000838113400001 info:eu-repo/semantics/openAccess Geosciences Multidisciplinary Multidisciplinär geovetenskap Article in journal info:eu-repo/semantics/article text 2022 ftuppsalauniv https://doi.org/10.1029/2022jd036597 2024-01-17T23:32:20Z Abrupt and large-scale climate changes have occurred repeatedly and within decades during the last glaciation. These events, where dramatic warming occurs over decades, are well represented in both Greenland ice core mineral dust and temperature records, suggesting a causal link. However, the feedbacks between atmospheric dust and climate change during these Dansgaard–Oeschger events are poorly known and the processes driving changes in atmospheric dust emission and transport remain elusive. Constraining dust provenance is key to resolving these gaps. Here, we present a multi-technique analysis of Greenland dust provenance using novel and established, source diagnostic isotopic tracers as well as results from a regional climate model including dust cycle simulations. We show that the existing dominant model for the provenance of Greenland dust as sourced from combined East Asian dust and Pacific volcanics is not supported. Rather, our clay mineralogical and Hf–Sr–Nd and D/H isotopic analyses from last glacial Greenland dust and an extensive range of Northern Hemisphere potential dust sources reveal three most likely scenarios (in order of probability): direct dust sourcing from the Taklimakan Desert in western China, direct sourcing from European glacial sources, or a mix of dust originating from Europe and North Africa. Furthermore, our regional climate modeling demonstrates the plausibility of European or mixed European/North African sources for the first time. We suggest that the origin of dust to Greenland is potentially more complex than previously recognized, demonstrating more uncertainty in our understanding dust climate feedbacks during abrupt events than previously understood. Article in Journal/Newspaper Dansgaard-Oeschger events Greenland Greenland ice core ice core Uppsala University: Publications (DiVA) Greenland Pacific Journal of Geophysical Research: Atmospheres 127 15 |