Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core
To assess the cause/effect relationship between climatic and environmental changes, we report high-resolution chemical profiles of the Dome C ice core (788m, 45 kyr), drilled in the framework of the European Project for Ice Coring in Antarctica (EPICA). Snow-concentration and depositional-flux chang...
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ftdatacite:10.48350/158774 2023-05-15T13:47:04+02:00 Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core Udisti, Roberto Becagli, Silvia Benassai, Silvia De Angelis, Martine Hansson, Margareta E. Jouzel, Jean Schwander, Jakob Steffensen, Jørgen P. Traversi, Rita Wolff, Eric 2004 https://dx.doi.org/10.48350/158774 https://boris.unibe.ch/158774/ unknown International Glaciological Society restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec 530 Physics Text ScholarlyArticle article-journal conference object 2004 ftdatacite https://doi.org/10.48350/158774 2021-11-05T12:55:41Z To assess the cause/effect relationship between climatic and environmental changes, we report high-resolution chemical profiles of the Dome C ice core (788m, 45 kyr), drilled in the framework of the European Project for Ice Coring in Antarctica (EPICA). Snow-concentration and depositional-flux changes during the last deglaciation were compared with climatic changes, derived by δD profile. Concentration and temperature profiles showed an anticorrelation, driven by changes in source intensity and transport efficiency of the atmospheric aerosol and by snow accumulation-rate variations. The flux calculation allowed correction for accumulation rate. While sulphate and ammonium fluxes are quite constant, Na+, Mg2+ and Ca2+ underwent the greatest changes, showing fluxes respectively about two, three and six times lower in the Holocene than in the Last Glacial Maximum. Chloride, nitrate and methanesulphonic acid (MSA) also exhibited large changes, but their persistence depends on depositional and post-depositional effects. The comparison between concentrations and δD profiles revealed leads and lags between chemical and temperature trends: Ca2+ and nitrate preceded by about 300 years the δD increase at the deglaciation onset, while MSA showed a 400 year delay. Generally, all components reached low Holocene values in the first deglaciation step (18.0–14.0 kyr BP), but Na+, Mg2+ and nitrate show changes during the Antarctic Cold Reversal (14.0– 12.5 kyr BP). Conference Object Antarc* Antarctic Antarctica East Antarctica EPICA ice core DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic East Antarctica |
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530 Physics |
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530 Physics Udisti, Roberto Becagli, Silvia Benassai, Silvia De Angelis, Martine Hansson, Margareta E. Jouzel, Jean Schwander, Jakob Steffensen, Jørgen P. Traversi, Rita Wolff, Eric Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
topic_facet |
530 Physics |
description |
To assess the cause/effect relationship between climatic and environmental changes, we report high-resolution chemical profiles of the Dome C ice core (788m, 45 kyr), drilled in the framework of the European Project for Ice Coring in Antarctica (EPICA). Snow-concentration and depositional-flux changes during the last deglaciation were compared with climatic changes, derived by δD profile. Concentration and temperature profiles showed an anticorrelation, driven by changes in source intensity and transport efficiency of the atmospheric aerosol and by snow accumulation-rate variations. The flux calculation allowed correction for accumulation rate. While sulphate and ammonium fluxes are quite constant, Na+, Mg2+ and Ca2+ underwent the greatest changes, showing fluxes respectively about two, three and six times lower in the Holocene than in the Last Glacial Maximum. Chloride, nitrate and methanesulphonic acid (MSA) also exhibited large changes, but their persistence depends on depositional and post-depositional effects. The comparison between concentrations and δD profiles revealed leads and lags between chemical and temperature trends: Ca2+ and nitrate preceded by about 300 years the δD increase at the deglaciation onset, while MSA showed a 400 year delay. Generally, all components reached low Holocene values in the first deglaciation step (18.0–14.0 kyr BP), but Na+, Mg2+ and nitrate show changes during the Antarctic Cold Reversal (14.0– 12.5 kyr BP). |
format |
Conference Object |
author |
Udisti, Roberto Becagli, Silvia Benassai, Silvia De Angelis, Martine Hansson, Margareta E. Jouzel, Jean Schwander, Jakob Steffensen, Jørgen P. Traversi, Rita Wolff, Eric |
author_facet |
Udisti, Roberto Becagli, Silvia Benassai, Silvia De Angelis, Martine Hansson, Margareta E. Jouzel, Jean Schwander, Jakob Steffensen, Jørgen P. Traversi, Rita Wolff, Eric |
author_sort |
Udisti, Roberto |
title |
Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
title_short |
Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
title_full |
Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
title_fullStr |
Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
title_full_unstemmed |
Sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution Dome C (East Antarctica) deep ice core |
title_sort |
sensitivity of chemical species to climate changes in the last 45 kyr as revealed by high-resolution dome c (east antarctica) deep ice core |
publisher |
International Glaciological Society |
publishDate |
2004 |
url |
https://dx.doi.org/10.48350/158774 https://boris.unibe.ch/158774/ |
geographic |
Antarctic The Antarctic East Antarctica |
geographic_facet |
Antarctic The Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
op_rights |
restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec |
op_doi |
https://doi.org/10.48350/158774 |
_version_ |
1766246267889909760 |