An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica
Abstract. 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 configuratio...
Main Authors: | , , , , , , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2020
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/2bn9n8jw |
id |
ftcdlib:oai:escholarship.org/ark:/13030/qt2bn9n8jw |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org/ark:/13030/qt2bn9n8jw 2023-05-15T13:52:09+02:00 An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica Lee, James E Brook, Edward J Bertler, Nancy AN Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J Hindmarsh, Richard Keller, Elizabeth D Parrenin, Frederic Severinghaus, Jeffrey P Vallelonga, Paul Waddington, Edwin D Winstrup, Mai 1691 - 1713 2020-09-02 application/pdf https://escholarship.org/uc/item/2bn9n8jw unknown eScholarship, University of California qt2bn9n8jw https://escholarship.org/uc/item/2bn9n8jw public CLIMATE OF THE PAST, vol 16, iss 5 Paleontology Physical Geography and Environmental Geoscience article 2020 ftcdlib 2021-09-06T17:11:56Z Abstract. 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 etal.,2019) with new estimates for gas and ice ages based on synchronization of CH4 and δ18Oatm 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet Roosevelt Island Ross Sea University of California: eScholarship Antarctic Roosevelt Island ENVELOPE(-162.000,-162.000,-79.283,-79.283) Ross Sea West Antarctic Ice Sheet |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Paleontology Physical Geography and Environmental Geoscience |
spellingShingle |
Paleontology Physical Geography and Environmental Geoscience Lee, James E Brook, Edward J Bertler, Nancy AN Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J Hindmarsh, Richard Keller, Elizabeth D Parrenin, Frederic Severinghaus, Jeffrey P Vallelonga, Paul Waddington, Edwin D Winstrup, Mai An 83 000-year-old ice core from Roosevelt Island, Ross Sea, Antarctica |
topic_facet |
Paleontology Physical Geography and Environmental Geoscience |
description |
Abstract. 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 etal.,2019) with new estimates for gas and ice ages based on synchronization of CH4 and δ18Oatm 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 |
Article in Journal/Newspaper |
author |
Lee, James E Brook, Edward J Bertler, Nancy AN Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J Hindmarsh, Richard Keller, Elizabeth D Parrenin, Frederic Severinghaus, Jeffrey P Vallelonga, Paul Waddington, Edwin D Winstrup, Mai |
author_facet |
Lee, James E Brook, Edward J Bertler, Nancy AN Buizert, Christo Baisden, Troy Blunier, Thomas Ciobanu, V Gabriela Conway, Howard Dahl-Jensen, Dorthe Fudge, Tyler J Hindmarsh, Richard Keller, Elizabeth D Parrenin, Frederic 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 |
publisher |
eScholarship, University of California |
publishDate |
2020 |
url |
https://escholarship.org/uc/item/2bn9n8jw |
op_coverage |
1691 - 1713 |
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 |
CLIMATE OF THE PAST, vol 16, iss 5 |
op_relation |
qt2bn9n8jw https://escholarship.org/uc/item/2bn9n8jw |
op_rights |
public |
_version_ |
1766256406586982400 |