Simulating the temperature and precipitation signal in an Alpine ice core
Accumulation and δ18O data from Alpine ice cores provide information on past temperature and precipitation. However, their correlation with seasonal or annual mean temperature and precipitation at nearby sites is often low. This is partly due to the irregular sampling of the atmosphere by the ice co...
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Copernicus Publications
2013
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00021910 2023-05-15T16:38:42+02:00 Simulating the temperature and precipitation signal in an Alpine ice core Brönnimann, S. Mariani, I. Schwikowski, M. Auchmann, R. Eichler, A. 2013-08 electronic https://doi.org/10.5194/cp-9-2013-2013 https://noa.gwlb.de/receive/cop_mods_00021910 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021865/cp-9-2013-2013.pdf https://cp.copernicus.org/articles/9/2013/2013/cp-9-2013-2013.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-9-2013-2013 https://noa.gwlb.de/receive/cop_mods_00021910 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021865/cp-9-2013-2013.pdf https://cp.copernicus.org/articles/9/2013/2013/cp-9-2013-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/cp-9-2013-2013 2022-02-08T22:51:24Z Accumulation and δ18O data from Alpine ice cores provide information on past temperature and precipitation. However, their correlation with seasonal or annual mean temperature and precipitation at nearby sites is often low. This is partly due to the irregular sampling of the atmosphere by the ice core (i.e. ice cores almost only record precipitation events and not dry periods) and the possible incongruity between annual layers and calendar years. Using daily meteorological data from a nearby station and reanalyses, we replicate the ice core from the Grenzgletscher (Switzerland, 4200 m a.s.l.) on a sample-by-sample basis by calculating precipitation-weighted temperature (PWT) over short intervals. Over the last 15 yr of the ice core record, accumulation and δ18O variations can be well reproduced on a sub-seasonal scale. This allows a wiggle-matching approach for defining quasi-annual layers, resulting in high correlations between measured quasi-annual δ18O and PWT. Further back in time, the agreement deteriorates. Nevertheless, we find significant correlations over the entire length of the record (1938–1993) of ice core δ18O with PWT, but not with annual mean temperature. This is due to the low correlations between PWT and annual mean temperature, a characteristic which in ERA-Interim reanalysis is also found for many other continental mid-to-high-latitude regions. The fact that meteorologically very different years can lead to similar combinations of PWT and accumulation poses limitations to the use of δ18O from Alpine ice cores for temperature reconstructions. Rather than for reconstructing annual mean temperature, δ18O from Alpine ice cores should be used to reconstruct PWT over quasi-annual periods. This variable is reproducible in reanalysis or climate model data and could thus be assimilated into conventional climate models. Article in Journal/Newspaper ice core Niedersächsisches Online-Archiv NOA Climate of the Past 9 4 2013 2022 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Brönnimann, S. Mariani, I. Schwikowski, M. Auchmann, R. Eichler, A. Simulating the temperature and precipitation signal in an Alpine ice core |
topic_facet |
article Verlagsveröffentlichung |
description |
Accumulation and δ18O data from Alpine ice cores provide information on past temperature and precipitation. However, their correlation with seasonal or annual mean temperature and precipitation at nearby sites is often low. This is partly due to the irregular sampling of the atmosphere by the ice core (i.e. ice cores almost only record precipitation events and not dry periods) and the possible incongruity between annual layers and calendar years. Using daily meteorological data from a nearby station and reanalyses, we replicate the ice core from the Grenzgletscher (Switzerland, 4200 m a.s.l.) on a sample-by-sample basis by calculating precipitation-weighted temperature (PWT) over short intervals. Over the last 15 yr of the ice core record, accumulation and δ18O variations can be well reproduced on a sub-seasonal scale. This allows a wiggle-matching approach for defining quasi-annual layers, resulting in high correlations between measured quasi-annual δ18O and PWT. Further back in time, the agreement deteriorates. Nevertheless, we find significant correlations over the entire length of the record (1938–1993) of ice core δ18O with PWT, but not with annual mean temperature. This is due to the low correlations between PWT and annual mean temperature, a characteristic which in ERA-Interim reanalysis is also found for many other continental mid-to-high-latitude regions. The fact that meteorologically very different years can lead to similar combinations of PWT and accumulation poses limitations to the use of δ18O from Alpine ice cores for temperature reconstructions. Rather than for reconstructing annual mean temperature, δ18O from Alpine ice cores should be used to reconstruct PWT over quasi-annual periods. This variable is reproducible in reanalysis or climate model data and could thus be assimilated into conventional climate models. |
format |
Article in Journal/Newspaper |
author |
Brönnimann, S. Mariani, I. Schwikowski, M. Auchmann, R. Eichler, A. |
author_facet |
Brönnimann, S. Mariani, I. Schwikowski, M. Auchmann, R. Eichler, A. |
author_sort |
Brönnimann, S. |
title |
Simulating the temperature and precipitation signal in an Alpine ice core |
title_short |
Simulating the temperature and precipitation signal in an Alpine ice core |
title_full |
Simulating the temperature and precipitation signal in an Alpine ice core |
title_fullStr |
Simulating the temperature and precipitation signal in an Alpine ice core |
title_full_unstemmed |
Simulating the temperature and precipitation signal in an Alpine ice core |
title_sort |
simulating the temperature and precipitation signal in an alpine ice core |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-2013-2013 https://noa.gwlb.de/receive/cop_mods_00021910 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021865/cp-9-2013-2013.pdf https://cp.copernicus.org/articles/9/2013/2013/cp-9-2013-2013.pdf |
genre |
ice core |
genre_facet |
ice core |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-9-2013-2013 https://noa.gwlb.de/receive/cop_mods_00021910 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021865/cp-9-2013-2013.pdf https://cp.copernicus.org/articles/9/2013/2013/cp-9-2013-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-9-2013-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
4 |
container_start_page |
2013 |
op_container_end_page |
2022 |
_version_ |
1766029026042839040 |