High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development
There is considerable uncertainty over the nature and causes of Holocene dust activity in the Arctic, and its links to climatic changes. Loess deposits act as near-source archives of dust deposition and provide a means to address these uncertainties. Here we develop a fully independent age model for...
Published in: | Quaternary Science Reviews |
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2023
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ftuniaarhuspubl:oai:pure.atira.dk:publications/70446307-1a04-48f1-9e7b-e95421363e65 2023-11-12T03:59:43+01:00 High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development Rasmussen, Christian F. Christiansen, Hanne H. Buylaert, Jan Pieter Cunningham, Alastair Schneider, Ramona Knudsen, Mads F. Stevens, Thomas 2023-06 https://pure.au.dk/portal/da/publications/highresolution-osl-dating-of-loess-in-adventdalen-svalbard(70446307-1a04-48f1-9e7b-e95421363e65).html https://doi.org/10.1016/j.quascirev.2023.108137 http://www.scopus.com/inward/record.url?scp=85159551541&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/highresolution-osl-dating-of-loess-in-adventdalen-svalbard(70446307-1a04-48f1-9e7b-e95421363e65).html info:eu-repo/semantics/openAccess Rasmussen , C F , Christiansen , H H , Buylaert , J P , Cunningham , A , Schneider , R , Knudsen , M F & Stevens , T 2023 , ' High-resolution OSL dating of loess in Adventdalen, Svalbard : Late Holocene dust activity and permafrost development ' , Quaternary Science Reviews , vol. 310 , 108137 . https://doi.org/10.1016/j.quascirev.2023.108137 Cryostratigraphy Grain-size High latitude dust Luminescence MAR Permafrost Spitzbergen article 2023 ftuniaarhuspubl https://doi.org/10.1016/j.quascirev.2023.108137 2023-10-25T23:01:12Z There is considerable uncertainty over the nature and causes of Holocene dust activity in the Arctic, and its links to climatic changes. Loess deposits act as near-source archives of dust deposition and provide a means to address these uncertainties. Here we develop a fully independent age model for a loess core taken in Adventdalen, Svalbard, based on 136 quartz luminescence ages taken at 2 cm intervals. This represents the most detailed luminescence dating analysis undertaken to date on a sedimentary archive. Extensive laboratory tests and stratigraphic consistency indicate that the quartz luminescence ages are reliable. Together with grain size and cryostratigraphic analyses, as well as stratigraphic investigation of an adjacent loess exposure, the exceptional detail of the chronology combined with Bayesian age modelling uniquely allows changes in loess accumulation rates, particle size and permafrost development to be reconstructed over the last 3000 yrs on 10 1 –10 3 yr timescales. The results show that loess deposition was mostly continuous over this interval, albeit with a short period of reworking or non-aeolian sedimentation during the Little Ice Age. Permafrost development in the loess is dominantly syngenetic, with ice contents increasing with depth. There is considerable variability in loess mass accumulation rate over the late Holocene, with peaks occurring during the last 250 yrs, as well as at 750–900, 1050–1200, 1400–1600, 1900–2450 and possibly 2700–3000 a. These peaks generally coincide with increased coarse silt deposition, potentially suggesting a link with greater wind activity. However, the peaks also seem to coincide with possible warm phases on Svalbard, which would rather imply that temperature-driven sediment availability in glaciofluvial source areas is the main control on dustiness in Adventdalen. In any case, the rates of loess deposition in the Adventdalen core are exceptionally high globally (up to 0.35 cm yr −1 /2900 g m −2 yr −1 sedimentation and mass accumulation rates, ... Article in Journal/Newspaper Adventdalen Arctic Ice permafrost Spitzbergen Svalbard Aarhus University: Research Adventdalen ENVELOPE(16.264,16.264,78.181,78.181) Arctic Svalbard Quaternary Science Reviews 310 108137 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Cryostratigraphy Grain-size High latitude dust Luminescence MAR Permafrost Spitzbergen |
spellingShingle |
Cryostratigraphy Grain-size High latitude dust Luminescence MAR Permafrost Spitzbergen Rasmussen, Christian F. Christiansen, Hanne H. Buylaert, Jan Pieter Cunningham, Alastair Schneider, Ramona Knudsen, Mads F. Stevens, Thomas High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
topic_facet |
Cryostratigraphy Grain-size High latitude dust Luminescence MAR Permafrost Spitzbergen |
description |
There is considerable uncertainty over the nature and causes of Holocene dust activity in the Arctic, and its links to climatic changes. Loess deposits act as near-source archives of dust deposition and provide a means to address these uncertainties. Here we develop a fully independent age model for a loess core taken in Adventdalen, Svalbard, based on 136 quartz luminescence ages taken at 2 cm intervals. This represents the most detailed luminescence dating analysis undertaken to date on a sedimentary archive. Extensive laboratory tests and stratigraphic consistency indicate that the quartz luminescence ages are reliable. Together with grain size and cryostratigraphic analyses, as well as stratigraphic investigation of an adjacent loess exposure, the exceptional detail of the chronology combined with Bayesian age modelling uniquely allows changes in loess accumulation rates, particle size and permafrost development to be reconstructed over the last 3000 yrs on 10 1 –10 3 yr timescales. The results show that loess deposition was mostly continuous over this interval, albeit with a short period of reworking or non-aeolian sedimentation during the Little Ice Age. Permafrost development in the loess is dominantly syngenetic, with ice contents increasing with depth. There is considerable variability in loess mass accumulation rate over the late Holocene, with peaks occurring during the last 250 yrs, as well as at 750–900, 1050–1200, 1400–1600, 1900–2450 and possibly 2700–3000 a. These peaks generally coincide with increased coarse silt deposition, potentially suggesting a link with greater wind activity. However, the peaks also seem to coincide with possible warm phases on Svalbard, which would rather imply that temperature-driven sediment availability in glaciofluvial source areas is the main control on dustiness in Adventdalen. In any case, the rates of loess deposition in the Adventdalen core are exceptionally high globally (up to 0.35 cm yr −1 /2900 g m −2 yr −1 sedimentation and mass accumulation rates, ... |
format |
Article in Journal/Newspaper |
author |
Rasmussen, Christian F. Christiansen, Hanne H. Buylaert, Jan Pieter Cunningham, Alastair Schneider, Ramona Knudsen, Mads F. Stevens, Thomas |
author_facet |
Rasmussen, Christian F. Christiansen, Hanne H. Buylaert, Jan Pieter Cunningham, Alastair Schneider, Ramona Knudsen, Mads F. Stevens, Thomas |
author_sort |
Rasmussen, Christian F. |
title |
High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
title_short |
High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
title_full |
High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
title_fullStr |
High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
title_full_unstemmed |
High-resolution OSL dating of loess in Adventdalen, Svalbard:Late Holocene dust activity and permafrost development |
title_sort |
high-resolution osl dating of loess in adventdalen, svalbard:late holocene dust activity and permafrost development |
publishDate |
2023 |
url |
https://pure.au.dk/portal/da/publications/highresolution-osl-dating-of-loess-in-adventdalen-svalbard(70446307-1a04-48f1-9e7b-e95421363e65).html https://doi.org/10.1016/j.quascirev.2023.108137 http://www.scopus.com/inward/record.url?scp=85159551541&partnerID=8YFLogxK |
long_lat |
ENVELOPE(16.264,16.264,78.181,78.181) |
geographic |
Adventdalen Arctic Svalbard |
geographic_facet |
Adventdalen Arctic Svalbard |
genre |
Adventdalen Arctic Ice permafrost Spitzbergen Svalbard |
genre_facet |
Adventdalen Arctic Ice permafrost Spitzbergen Svalbard |
op_source |
Rasmussen , C F , Christiansen , H H , Buylaert , J P , Cunningham , A , Schneider , R , Knudsen , M F & Stevens , T 2023 , ' High-resolution OSL dating of loess in Adventdalen, Svalbard : Late Holocene dust activity and permafrost development ' , Quaternary Science Reviews , vol. 310 , 108137 . https://doi.org/10.1016/j.quascirev.2023.108137 |
op_relation |
https://pure.au.dk/portal/da/publications/highresolution-osl-dating-of-loess-in-adventdalen-svalbard(70446307-1a04-48f1-9e7b-e95421363e65).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2023.108137 |
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Quaternary Science Reviews |
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108137 |
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