Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr
Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were volcanically synchronized to improve our understanding of their chronologies. Within the past 216 kyr, 1401 volcanic tie points have been identified. DFO2006 is the chronology for the DF cor...
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ftdoajarticles:oai:doaj.org/article:066510f45db1480d93107e316cec4292 2023-05-15T13:39:56+02:00 Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr S. Fujita F. Parrenin M. Severi H. Motoyama E. W. Wolff 2015-10-01T00:00:00Z https://doi.org/10.5194/cp-11-1395-2015 https://doaj.org/article/066510f45db1480d93107e316cec4292 EN eng Copernicus Publications http://www.clim-past.net/11/1395/2015/cp-11-1395-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-1395-2015 https://doaj.org/article/066510f45db1480d93107e316cec4292 Climate of the Past, Vol 11, Iss 10, Pp 1395-1416 (2015) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.5194/cp-11-1395-2015 2022-12-31T11:44:04Z Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were volcanically synchronized to improve our understanding of their chronologies. Within the past 216 kyr, 1401 volcanic tie points have been identified. DFO2006 is the chronology for the DF core that strictly follows O 2 / N 2 age constraints with interpolation using an ice flow model. AICC2012 is the chronology for five cores, including the EDC core, and is characterized by glaciological approaches combining ice flow modelling with various age markers. A precise comparison between the two chronologies was performed. The age differences between them are within 2 kyr, except at Marine Isotope Stage (MIS) 5. DFO2006 gives ages older than AICC2012, with peak values of 4.5 and 3.1 kyr at MIS 5d and MIS 5b, respectively. Accordingly, the ratios of duration (AICC2012 / DFO2006) range between 1.4 at MIS 5e and 0.7 at MIS 5a. When making a comparison with accurately dated speleothem records, the age of DFO2006 agrees well at MIS 5d, while the age of AICC2012 agrees well at MIS 5b, supporting their accuracy at these stages. In addition, we found that glaciological approaches tend to give chronologies with younger ages and with longer durations than age markers suggest at MIS 5d–6. Therefore, we hypothesize that the causes of the DFO2006–AICC2012 age differences at MIS 5 are (i) overestimation in surface mass balance at around MIS 5d–6 in the glaciological approach and (ii) an error in one of the O 2 / N 2 age constraints by ~ 3 kyr at MIS 5b. Overall, we improved our knowledge of the timing and duration of climatic stages at MIS 5. This new understanding will be incorporated into the production of the next common age scale. Additionally, we found that the deuterium signals of ice, δ D ice , at DF tends to lead the one at EDC, with the DF lead being more pronounced during cold periods. The lead of DF is by +710 years (maximum) at MIS 5d, −230 years (minimum) at MIS 7a and +60 to +126 years on average. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA Directory of Open Access Journals: DOAJ Articles Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 11 10 1395 1416 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 S. Fujita F. Parrenin M. Severi H. Motoyama E. W. Wolff Volcanic synchronization of Dome Fuji and Dome C Antarctic deep ice cores over the past 216 kyr |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Two deep ice cores, Dome Fuji (DF) and EPICA Dome C (EDC), drilled at remote dome summits in Antarctica, were volcanically synchronized to improve our understanding of their chronologies. Within the past 216 kyr, 1401 volcanic tie points have been identified. DFO2006 is the chronology for the DF core that strictly follows O 2 / N 2 age constraints with interpolation using an ice flow model. AICC2012 is the chronology for five cores, including the EDC core, and is characterized by glaciological approaches combining ice flow modelling with various age markers. A precise comparison between the two chronologies was performed. The age differences between them are within 2 kyr, except at Marine Isotope Stage (MIS) 5. DFO2006 gives ages older than AICC2012, with peak values of 4.5 and 3.1 kyr at MIS 5d and MIS 5b, respectively. Accordingly, the ratios of duration (AICC2012 / DFO2006) range between 1.4 at MIS 5e and 0.7 at MIS 5a. When making a comparison with accurately dated speleothem records, the age of DFO2006 agrees well at MIS 5d, while the age of AICC2012 agrees well at MIS 5b, supporting their accuracy at these stages. In addition, we found that glaciological approaches tend to give chronologies with younger ages and with longer durations than age markers suggest at MIS 5d–6. Therefore, we hypothesize that the causes of the DFO2006–AICC2012 age differences at MIS 5 are (i) overestimation in surface mass balance at around MIS 5d–6 in the glaciological approach and (ii) an error in one of the O 2 / N 2 age constraints by ~ 3 kyr at MIS 5b. Overall, we improved our knowledge of the timing and duration of climatic stages at MIS 5. This new understanding will be incorporated into the production of the next common age scale. Additionally, we found that the deuterium signals of ice, δ D ice , at DF tends to lead the one at EDC, with the DF lead being more pronounced during cold periods. The lead of DF is by +710 years (maximum) at MIS 5d, −230 years (minimum) at MIS 7a and +60 to +126 years on average. |
format |
Article in Journal/Newspaper |
author |
S. Fujita F. Parrenin M. Severi H. Motoyama E. W. Wolff |
author_facet |
S. Fujita F. Parrenin M. Severi H. Motoyama E. W. Wolff |
author_sort |
S. Fujita |
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://doi.org/10.5194/cp-11-1395-2015 https://doaj.org/article/066510f45db1480d93107e316cec4292 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome Fuji |
geographic_facet |
Antarctic Dome Fuji |
genre |
Antarc* Antarctic Antarctica EPICA |
genre_facet |
Antarc* Antarctic Antarctica EPICA |
op_source |
Climate of the Past, Vol 11, Iss 10, Pp 1395-1416 (2015) |
op_relation |
http://www.clim-past.net/11/1395/2015/cp-11-1395-2015.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-11-1395-2015 https://doaj.org/article/066510f45db1480d93107e316cec4292 |
op_doi |
https://doi.org/10.5194/cp-11-1395-2015 |
container_title |
Climate of the Past |
container_volume |
11 |
container_issue |
10 |
container_start_page |
1395 |
op_container_end_page |
1416 |
_version_ |
1766126301579575296 |