Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica
Stable water isotopologues of snow, firn and ice cores provide valuable information on past climate variations. Yet single profiles are generally not suitable for robust climate reconstructions. Stratigraphic noise, introduced by the irregular deposition, wind-driven erosion and redistribution of sn...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069112 2023-11-05T03:36:59+01:00 Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica Hirsch, Nora Zuhr, Alexandra Münch, Thomas Hörhold, Maria Freitag, Johannes Dallmayr, Remi Laepple, Thomas 2023-10 electronic https://doi.org/10.5194/tc-17-4207-2023 https://noa.gwlb.de/receive/cop_mods_00069112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067514/tc-17-4207-2023.pdf https://tc.copernicus.org/articles/17/4207/2023/tc-17-4207-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4207-2023 https://noa.gwlb.de/receive/cop_mods_00069112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067514/tc-17-4207-2023.pdf https://tc.copernicus.org/articles/17/4207/2023/tc-17-4207-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-4207-2023 2023-10-08T23:22:04Z Stable water isotopologues of snow, firn and ice cores provide valuable information on past climate variations. Yet single profiles are generally not suitable for robust climate reconstructions. Stratigraphic noise, introduced by the irregular deposition, wind-driven erosion and redistribution of snow, impacts the utility of high-resolution isotope records, especially in low-accumulation areas. However, it is currently unknown how stratigraphic noise differs across the East Antarctic Plateau and how it is affected by local environmental conditions. Here, we assess the amount and structure of stratigraphic noise at seven sites along a 120 km transect on the plateau of Dronning Maud Land, East Antarctica. Replicated oxygen isotope records of 1 m length were used to estimate signal-to-noise ratios as a measure of stratigraphic noise at sites characterised by different accumulation rates (43–64 mm w.e. a−1), snow surface roughnesses and slope inclinations. While we found a high level of stratigraphic noise at all sites, there was also considerable variation between sites. At sastrugi-dominated sites, greater stratigraphic noise coincided with stronger surface roughnesses, steeper slopes and lower accumulation rates, probably related to increased wind speeds. These results provide a first step to modelling stratigraphic noise and might guide site selection and sampling strategies for future expeditions to improve high-resolution climate reconstructions from low-accumulation regions. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 17 10 4207 4221 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Hirsch, Nora Zuhr, Alexandra Münch, Thomas Hörhold, Maria Freitag, Johannes Dallmayr, Remi Laepple, Thomas Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Stable water isotopologues of snow, firn and ice cores provide valuable information on past climate variations. Yet single profiles are generally not suitable for robust climate reconstructions. Stratigraphic noise, introduced by the irregular deposition, wind-driven erosion and redistribution of snow, impacts the utility of high-resolution isotope records, especially in low-accumulation areas. However, it is currently unknown how stratigraphic noise differs across the East Antarctic Plateau and how it is affected by local environmental conditions. Here, we assess the amount and structure of stratigraphic noise at seven sites along a 120 km transect on the plateau of Dronning Maud Land, East Antarctica. Replicated oxygen isotope records of 1 m length were used to estimate signal-to-noise ratios as a measure of stratigraphic noise at sites characterised by different accumulation rates (43–64 mm w.e. a−1), snow surface roughnesses and slope inclinations. While we found a high level of stratigraphic noise at all sites, there was also considerable variation between sites. At sastrugi-dominated sites, greater stratigraphic noise coincided with stronger surface roughnesses, steeper slopes and lower accumulation rates, probably related to increased wind speeds. These results provide a first step to modelling stratigraphic noise and might guide site selection and sampling strategies for future expeditions to improve high-resolution climate reconstructions from low-accumulation regions. |
format |
Article in Journal/Newspaper |
author |
Hirsch, Nora Zuhr, Alexandra Münch, Thomas Hörhold, Maria Freitag, Johannes Dallmayr, Remi Laepple, Thomas |
author_facet |
Hirsch, Nora Zuhr, Alexandra Münch, Thomas Hörhold, Maria Freitag, Johannes Dallmayr, Remi Laepple, Thomas |
author_sort |
Hirsch, Nora |
title |
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
title_short |
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
title_full |
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
title_fullStr |
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica |
title_sort |
stratigraphic noise and its potential drivers across the plateau of dronning maud land, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-4207-2023 https://noa.gwlb.de/receive/cop_mods_00069112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067514/tc-17-4207-2023.pdf https://tc.copernicus.org/articles/17/4207/2023/tc-17-4207-2023.pdf |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4207-2023 https://noa.gwlb.de/receive/cop_mods_00069112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067514/tc-17-4207-2023.pdf https://tc.copernicus.org/articles/17/4207/2023/tc-17-4207-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-4207-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
10 |
container_start_page |
4207 |
op_container_end_page |
4221 |
_version_ |
1781692343715364864 |