Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records
Millennial-scale palaeoclimate variability has been documented in various terrestrial and marine palaeoclimate proxy records throughout the Northern Hemisphere for the last glacial cycle. Its clear expression and rapid shifts between different states of climate (Greenland Interstadials and Stadials)...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:52500 2023-05-15T16:26:17+02:00 Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records Zeeden, Christian (Dr.) Obreht, Igor (Dr. rer. nat.) Veres, Daniel Kaboth-Bahr, Stefanie (Dr. Dipl.-Geoökol.) Hošek, Jan Marković, Slobodan B. Bösken, Janina Lehmkuhl, Frank (Prof. Dr. rer. nat.) Rolf, Christian Hambach, Ulrich 2020-03-25 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/52500 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/52500 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess CC-BY ddc:550 Institut für Geowissenschaften article doc-type:article 2020 ftubpotsdam 2022-08-21T22:36:49Z Millennial-scale palaeoclimate variability has been documented in various terrestrial and marine palaeoclimate proxy records throughout the Northern Hemisphere for the last glacial cycle. Its clear expression and rapid shifts between different states of climate (Greenland Interstadials and Stadials) represents a correlation tool beyond the resolution of e.g. luminescence dating, especially relevant for terrestrial deposits. Usually, comparison of terrestrial proxy datasets and the Greenland ice cores indicates a complex expression of millennial-scale climate variability as recorded in terrestrial geoarchives including loess. Loess is the most widespread terrestrial geoarchive of the Quaternary and especially widespread over Eurasia. However, loess often records a smoothed representation of millennial-scale variability without all fidelity when compared to the Greenland data, this being a relevant limiting feature in integrating loess with other palaeoclimate records. To better understand the loess proxy-response to millennial-scale climate variability, we simulate a proxy signal smoothing by natural processes through application of low-pass filters of delta O-18 data from Greenland, a high-resolution palaeoclimate reference record, alongside speleothem isotope records from the Black Sea-Mediterranean region. We show that low-pass filters represent rather simple models for better constraining the expression of millennial-scale climate variability in low sedimentation environments, and in sediments where proxy-response signals are most likely affected by natural smoothing (by e.g. bioturbation). Interestingly, smoothed datasets from Greenland and the Black Sea-Mediterranean region are most similar in the last similar to 15 ka and between similar to 50-30 ka. Between similar to 30-15 ka, roughly corresponding to the Last Glacial Maximum and the deglaciation, the records show dissimilarities, challenging the construction of robust correlative time-scales in this age range. From our analysis it becomes apparent that ... Article in Journal/Newspaper Greenland Greenland ice cores University of Potsdam: publish.UP Greenland |
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Open Polar |
collection |
University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
ddc:550 Institut für Geowissenschaften |
spellingShingle |
ddc:550 Institut für Geowissenschaften Zeeden, Christian (Dr.) Obreht, Igor (Dr. rer. nat.) Veres, Daniel Kaboth-Bahr, Stefanie (Dr. Dipl.-Geoökol.) Hošek, Jan Marković, Slobodan B. Bösken, Janina Lehmkuhl, Frank (Prof. Dr. rer. nat.) Rolf, Christian Hambach, Ulrich Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
topic_facet |
ddc:550 Institut für Geowissenschaften |
description |
Millennial-scale palaeoclimate variability has been documented in various terrestrial and marine palaeoclimate proxy records throughout the Northern Hemisphere for the last glacial cycle. Its clear expression and rapid shifts between different states of climate (Greenland Interstadials and Stadials) represents a correlation tool beyond the resolution of e.g. luminescence dating, especially relevant for terrestrial deposits. Usually, comparison of terrestrial proxy datasets and the Greenland ice cores indicates a complex expression of millennial-scale climate variability as recorded in terrestrial geoarchives including loess. Loess is the most widespread terrestrial geoarchive of the Quaternary and especially widespread over Eurasia. However, loess often records a smoothed representation of millennial-scale variability without all fidelity when compared to the Greenland data, this being a relevant limiting feature in integrating loess with other palaeoclimate records. To better understand the loess proxy-response to millennial-scale climate variability, we simulate a proxy signal smoothing by natural processes through application of low-pass filters of delta O-18 data from Greenland, a high-resolution palaeoclimate reference record, alongside speleothem isotope records from the Black Sea-Mediterranean region. We show that low-pass filters represent rather simple models for better constraining the expression of millennial-scale climate variability in low sedimentation environments, and in sediments where proxy-response signals are most likely affected by natural smoothing (by e.g. bioturbation). Interestingly, smoothed datasets from Greenland and the Black Sea-Mediterranean region are most similar in the last similar to 15 ka and between similar to 50-30 ka. Between similar to 30-15 ka, roughly corresponding to the Last Glacial Maximum and the deglaciation, the records show dissimilarities, challenging the construction of robust correlative time-scales in this age range. From our analysis it becomes apparent that ... |
format |
Article in Journal/Newspaper |
author |
Zeeden, Christian (Dr.) Obreht, Igor (Dr. rer. nat.) Veres, Daniel Kaboth-Bahr, Stefanie (Dr. Dipl.-Geoökol.) Hošek, Jan Marković, Slobodan B. Bösken, Janina Lehmkuhl, Frank (Prof. Dr. rer. nat.) Rolf, Christian Hambach, Ulrich |
author_facet |
Zeeden, Christian (Dr.) Obreht, Igor (Dr. rer. nat.) Veres, Daniel Kaboth-Bahr, Stefanie (Dr. Dipl.-Geoökol.) Hošek, Jan Marković, Slobodan B. Bösken, Janina Lehmkuhl, Frank (Prof. Dr. rer. nat.) Rolf, Christian Hambach, Ulrich |
author_sort |
Zeeden, Christian (Dr.) |
title |
Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
title_short |
Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
title_full |
Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
title_fullStr |
Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
title_full_unstemmed |
Smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: Application to European loess records |
title_sort |
smoothed millennial-scale palaeoclimatic reference data as unconventional comparison targets: application to european loess records |
publishDate |
2020 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/52500 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores |
genre_facet |
Greenland Greenland ice cores |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/52500 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess |
op_rightsnorm |
CC-BY |
_version_ |
1766015185075568640 |