Precise timing of MIS 7 substages from the Austrian Alps
Investigating the precise timing of regional-scale climate changes during glacial terminations and the interglacial periods that follow is key to unraveling the mechanisms behind these global climate shifts. Here, we present a high-precision time series of climate changes in the Austrian Alps that c...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2021
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-17-1443-2021 https://cp.copernicus.org/articles/17/1443/2021/ |
id |
fttriple:oai:gotriple.eu:EbGcqL2PPpG6OjNyT9vEM |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:EbGcqL2PPpG6OjNyT9vEM 2023-05-15T17:35:39+02:00 Precise timing of MIS 7 substages from the Austrian Alps Wendt, Kathleen A. Li, Xianglei Edwards, R. Lawrence Cheng, Hai Spötl, Christoph 2021-07-09 https://doi.org/10.5194/cp-17-1443-2021 https://cp.copernicus.org/articles/17/1443/2021/ en eng Copernicus Publications doi:10.5194/cp-17-1443-2021 10670/1.f6hieb 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/1443/2021/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/cp-17-1443-2021 2023-01-22T17:39:14Z Investigating the precise timing of regional-scale climate changes during glacial terminations and the interglacial periods that follow is key to unraveling the mechanisms behind these global climate shifts. Here, we present a high-precision time series of climate changes in the Austrian Alps that coincide with the later portion of Termination III (TIII), the entire penultimate interglacial (Marine Isotope Stage (MIS) 7), Termination IIIa (TIIIa), and the penultimate glacial inception (MIS 7–6 transition). Using state-of-the-art mass spectrometry techniques, we have constructed a uranium-series chronology with relative age uncertainties averaging 1.7 ‰ (2σ) for our study period (247 to 191 thousand years before present, ka). Results reveal the onset of warming in the Austrian Alps associated with TIII at 242.5 ± 0.2 ka and the duration of MIS 7e warming between 241.8 and 236.7 (±0.6) ka. An abrupt shift towards higher δ18O values at 216.8 ka marks the onset of regional warming associated with TIIIa. Two periods of high δ18O values (greater than −10 ‰ Vienna Pee Dee Belemnite (VPDB)) between 215.9–213.3 and 204.3–197.5 (±0.4) ka coincide with interglacial substages MIS 7c and 7a, respectively. Multiple fluorescent inclusions suggest a partial retreat of the local Alpine glacier during peak obliquity forcings at 214.3 ± 0.4 ka. Two newly collected stalagmites from Spannagel Cave (SPA146 and 183) provide high-resolution replications of the latter portion of the MIS 7a-to-6e transition. The resulting multi-stalagmite record reveals important chronological constraints on climate shifts in the Austrian Alps associated with MIS 7 while offering new insight into the timing of millennial-scale changes in the North Atlantic realm leading up to TIII and TIIIa. Article in Journal/Newspaper North Atlantic Unknown Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) Climate of the Past 17 4 1443 1454 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Wendt, Kathleen A. Li, Xianglei Edwards, R. Lawrence Cheng, Hai Spötl, Christoph Precise timing of MIS 7 substages from the Austrian Alps |
topic_facet |
geo envir |
description |
Investigating the precise timing of regional-scale climate changes during glacial terminations and the interglacial periods that follow is key to unraveling the mechanisms behind these global climate shifts. Here, we present a high-precision time series of climate changes in the Austrian Alps that coincide with the later portion of Termination III (TIII), the entire penultimate interglacial (Marine Isotope Stage (MIS) 7), Termination IIIa (TIIIa), and the penultimate glacial inception (MIS 7–6 transition). Using state-of-the-art mass spectrometry techniques, we have constructed a uranium-series chronology with relative age uncertainties averaging 1.7 ‰ (2σ) for our study period (247 to 191 thousand years before present, ka). Results reveal the onset of warming in the Austrian Alps associated with TIII at 242.5 ± 0.2 ka and the duration of MIS 7e warming between 241.8 and 236.7 (±0.6) ka. An abrupt shift towards higher δ18O values at 216.8 ka marks the onset of regional warming associated with TIIIa. Two periods of high δ18O values (greater than −10 ‰ Vienna Pee Dee Belemnite (VPDB)) between 215.9–213.3 and 204.3–197.5 (±0.4) ka coincide with interglacial substages MIS 7c and 7a, respectively. Multiple fluorescent inclusions suggest a partial retreat of the local Alpine glacier during peak obliquity forcings at 214.3 ± 0.4 ka. Two newly collected stalagmites from Spannagel Cave (SPA146 and 183) provide high-resolution replications of the latter portion of the MIS 7a-to-6e transition. The resulting multi-stalagmite record reveals important chronological constraints on climate shifts in the Austrian Alps associated with MIS 7 while offering new insight into the timing of millennial-scale changes in the North Atlantic realm leading up to TIII and TIIIa. |
format |
Article in Journal/Newspaper |
author |
Wendt, Kathleen A. Li, Xianglei Edwards, R. Lawrence Cheng, Hai Spötl, Christoph |
author_facet |
Wendt, Kathleen A. Li, Xianglei Edwards, R. Lawrence Cheng, Hai Spötl, Christoph |
author_sort |
Wendt, Kathleen A. |
title |
Precise timing of MIS 7 substages from the Austrian Alps |
title_short |
Precise timing of MIS 7 substages from the Austrian Alps |
title_full |
Precise timing of MIS 7 substages from the Austrian Alps |
title_fullStr |
Precise timing of MIS 7 substages from the Austrian Alps |
title_full_unstemmed |
Precise timing of MIS 7 substages from the Austrian Alps |
title_sort |
precise timing of mis 7 substages from the austrian alps |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-1443-2021 https://cp.copernicus.org/articles/17/1443/2021/ |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
geographic |
Dee |
geographic_facet |
Dee |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-17-1443-2021 10670/1.f6hieb 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/1443/2021/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-17-1443-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
4 |
container_start_page |
1443 |
op_container_end_page |
1454 |
_version_ |
1766134873003655168 |