Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr
<jats:p>Abstract. Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were synchronized to better understand their chronology. A total of 1401 volcanic tie points were identified covering the past 216 kyr. DFO2006, the chronology for the DF...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/251244 2024-02-04T09:54:32+01:00 Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr Fujita, S Parrenin, F Severi, M Motoyama, H Wolff, E 2015-02-17 application/pdf https://www.repository.cam.ac.uk/handle/1810/251244 English eng eng Copernicus Publications http://dx.doi.org/10.5194/cpd-11-407-2015 Climate of the Past https://www.repository.cam.ac.uk/handle/1810/251244 Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Article 2015 ftunivcam 2024-01-11T23:30:49Z <jats:p>Abstract. Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were synchronized to better understand their chronology. A total of 1401 volcanic tie points were identified covering the past 216 kyr. DFO2006, the chronology for the DF core characterized by strong constraining by the O2/N2 age markers, was compared with AICC2012, the chronology for 5 cores including the EDC core, and characterized by glaciological approaches combining ice flow modelling with various age markers. The age gaps between the two chronologies are within 2 kyr, except at Marine Isotope Stage (MIS) 5. DFO2006 gives ages older than AICC2012, with peak values of the gap of 4.5 and 3.1 kyr at MIS 5d and MIS 5b, respectively. Accordingly, ratios of duration DFO2006/AICC2012 are 85% at a period from the late stage of MIS 6 to MIS 5d and 114% at a period from MIS 5d to 5b. We then compared the DFO2006 with another chronology of the DF core, DFGT2006, characterized by glaciological approaches with weaker constraining by age markers. Features of the DFO2006/DFGT2006 age gaps are very similar to those of the DFO2006/AICC2012 age gaps. This fact lead us to hypothesize that a cause of the systematic DFO2006/AICC2012 age gaps at MIS 5 are associated with differences in the dating approaches. Besides, ages of speleothem records from China agreed well with DFO2006 at MIS 5c and 5d but not at MIS 5b. Thus, we hypothesize at least at MIS 5c and 5d, major sources of the gaps are systematic errors in surface mass balance estimation in the glaciological approach. Compatibility of the age markers should be carefully assessed in future. </jats:p> This work is a contribution to the European Project for Ice Coring in Antarctica (EPICA), a joint European Science Foundation/European Commission scientific program, funded by the European Union and by national contributions from Belgium, Denmark, France, Germany, Italy, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom. This ... Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA Apollo - University of Cambridge Repository Antarctic Norway Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Fujita, S Parrenin, F Severi, M Motoyama, H Wolff, E Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
description |
<jats:p>Abstract. Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were synchronized to better understand their chronology. A total of 1401 volcanic tie points were identified covering the past 216 kyr. DFO2006, the chronology for the DF core characterized by strong constraining by the O2/N2 age markers, was compared with AICC2012, the chronology for 5 cores including the EDC core, and characterized by glaciological approaches combining ice flow modelling with various age markers. The age gaps between the two chronologies are within 2 kyr, except at Marine Isotope Stage (MIS) 5. DFO2006 gives ages older than AICC2012, with peak values of the gap of 4.5 and 3.1 kyr at MIS 5d and MIS 5b, respectively. Accordingly, ratios of duration DFO2006/AICC2012 are 85% at a period from the late stage of MIS 6 to MIS 5d and 114% at a period from MIS 5d to 5b. We then compared the DFO2006 with another chronology of the DF core, DFGT2006, characterized by glaciological approaches with weaker constraining by age markers. Features of the DFO2006/DFGT2006 age gaps are very similar to those of the DFO2006/AICC2012 age gaps. This fact lead us to hypothesize that a cause of the systematic DFO2006/AICC2012 age gaps at MIS 5 are associated with differences in the dating approaches. Besides, ages of speleothem records from China agreed well with DFO2006 at MIS 5c and 5d but not at MIS 5b. Thus, we hypothesize at least at MIS 5c and 5d, major sources of the gaps are systematic errors in surface mass balance estimation in the glaciological approach. Compatibility of the age markers should be carefully assessed in future. </jats:p> This work is a contribution to the European Project for Ice Coring in Antarctica (EPICA), a joint European Science Foundation/European Commission scientific program, funded by the European Union and by national contributions from Belgium, Denmark, France, Germany, Italy, the Netherlands, Norway, Sweden, Switzerland and the United Kingdom. This ... |
format |
Article in Journal/Newspaper |
author |
Fujita, S Parrenin, F Severi, M Motoyama, H Wolff, E |
author_facet |
Fujita, S Parrenin, F Severi, M Motoyama, H Wolff, E |
author_sort |
Fujita, S |
title |
Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
title_short |
Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
title_full |
Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
title_fullStr |
Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
title_full_unstemmed |
Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
title_sort |
volcanic synchronization of dome fuji and dome c antarctic deep ice cores over the past 216 kyr |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://www.repository.cam.ac.uk/handle/1810/251244 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Norway Dome Fuji |
geographic_facet |
Antarctic Norway Dome Fuji |
genre |
Antarc* Antarctic Antarctica EPICA |
genre_facet |
Antarc* Antarctic Antarctica EPICA |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/251244 |
op_rights |
Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1789974487658135552 |