An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica
In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the W...
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ftcopernicus:oai:publications.copernicus.org:cp69787 2023-05-15T13:31:39+02:00 An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica Lee, James E. Brook, Edward J. Bertler, Nancy A. N. Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V. Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J. Hindmarsh, Richard Keller, Elizabeth D. Parrenin, Frédéric Severinghaus, Jeffrey P. Vallelonga, Paul Waddington, Edwin D. Winstrup, Mai 2020-09-02 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/cp-16-1691-2020 https://cp.copernicus.org/articles/16/1691/2020/ eng eng info:eu-repo/grantAgreement/EC/FP7/610055 doi:10.5194/cp-16-1691-2020 https://cp.copernicus.org/articles/16/1691/2020/ info:eu-repo/semantics/openAccess eISSN: 1814-9332 info:eu-repo/semantics/Text 2020 ftcopernicus https://doi.org/10.5194/cp-16-1691-2020 2020-09-07T16:22:14Z In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the West Antarctic Ice Sheet (WAIS) and its retreat during the last deglaciation. In this work we present the RICE17 chronology, which establishes the depth–age relationship for the top 754 m of the 763 m core. RICE17 is a composite chronology combining annual layer interpretations for 0–343 m ( Winstrup et al. , 2019 ) with new estimates for gas and ice ages based on synchronization of CH 4 and δ 18 O atm records to corresponding records from the WAIS Divide ice core and by modeling of the gas age–ice age difference. Novel aspects of this work include the following: (1) an automated algorithm for multiproxy stratigraphic synchronization of high-resolution gas records; (2) synchronization using centennial-scale variations in methane for pre-anthropogenic time periods (60–720 m, 1971 CE to 30 ka), a strategy applicable for future ice cores; and (3) the observation of a continuous climate record back to ∼65 ka providing evidence that the Roosevelt Island Ice Dome was a constant feature throughout the last glacial period. Other/Unknown Material Antarc* Antarctic Antarctica ice core Ice Sheet Roosevelt Island Ross Sea Copernicus Publications: E-Journals Antarctic Roosevelt Island ENVELOPE(-162.000,-162.000,-79.283,-79.283) Ross Sea West Antarctic Ice Sheet Climate of the Past 16 5 1691 1713 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
In 2013 an ice core was recovered from Roosevelt Island, an ice dome between two submarine troughs carved by paleo-ice-streams in the Ross Sea, Antarctica. The ice core is part of the Roosevelt Island Climate Evolution (RICE) project and provides new information about the past configuration of the West Antarctic Ice Sheet (WAIS) and its retreat during the last deglaciation. In this work we present the RICE17 chronology, which establishes the depth–age relationship for the top 754 m of the 763 m core. RICE17 is a composite chronology combining annual layer interpretations for 0–343 m ( Winstrup et al. , 2019 ) with new estimates for gas and ice ages based on synchronization of CH 4 and δ 18 O atm records to corresponding records from the WAIS Divide ice core and by modeling of the gas age–ice age difference. Novel aspects of this work include the following: (1) an automated algorithm for multiproxy stratigraphic synchronization of high-resolution gas records; (2) synchronization using centennial-scale variations in methane for pre-anthropogenic time periods (60–720 m, 1971 CE to 30 ka), a strategy applicable for future ice cores; and (3) the observation of a continuous climate record back to ∼65 ka providing evidence that the Roosevelt Island Ice Dome was a constant feature throughout the last glacial period. |
format |
Other/Unknown Material |
author |
Lee, James E. Brook, Edward J. Bertler, Nancy A. N. Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V. Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J. Hindmarsh, Richard Keller, Elizabeth D. Parrenin, Frédéric Severinghaus, Jeffrey P. Vallelonga, Paul Waddington, Edwin D. Winstrup, Mai |
spellingShingle |
Lee, James E. Brook, Edward J. Bertler, Nancy A. N. Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V. Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J. Hindmarsh, Richard Keller, Elizabeth D. Parrenin, Frédéric Severinghaus, Jeffrey P. Vallelonga, Paul Waddington, Edwin D. Winstrup, Mai An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
author_facet |
Lee, James E. Brook, Edward J. Bertler, Nancy A. N. Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V. Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J. Hindmarsh, Richard Keller, Elizabeth D. Parrenin, Frédéric Severinghaus, Jeffrey P. Vallelonga, Paul Waddington, Edwin D. Winstrup, Mai |
author_sort |
Lee, James E. |
title |
An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
title_short |
An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
title_full |
An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
title_fullStr |
An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
title_full_unstemmed |
An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
title_sort |
83 000-year-old ice core from roosevelt island, ross sea, antarctica |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-1691-2020 https://cp.copernicus.org/articles/16/1691/2020/ |
long_lat |
ENVELOPE(-162.000,-162.000,-79.283,-79.283) |
geographic |
Antarctic Roosevelt Island Ross Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Roosevelt Island Ross Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet Roosevelt Island Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet Roosevelt Island Ross Sea |
op_source |
eISSN: 1814-9332 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/610055 doi:10.5194/cp-16-1691-2020 https://cp.copernicus.org/articles/16/1691/2020/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-16-1691-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
5 |
container_start_page |
1691 |
op_container_end_page |
1713 |
_version_ |
1766019688585756672 |