Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean
The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were cali...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.832121 2023-05-15T14:25:42+02:00 Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean Kaufman, Darrell S Polyak, Leonid Adler, Ruth E Channell, James E T Xuan, Chuang MEDIAN LATITUDE: 80.932147 * MEDIAN LONGITUDE: 178.454656 * SOUTH-BOUND LATITUDE: 74.622500 * WEST-BOUND LONGITUDE: 144.770330 * NORTH-BOUND LATITUDE: 87.091830 * EAST-BOUND LONGITUDE: -157.884000 * DATE/TIME START: 1996-08-14T00:00:00 * DATE/TIME END: 2005-08-25T00:00:00 2008-04-25 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.832121 https://doi.org/10.1594/PANGAEA.832121 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.832121 https://doi.org/10.1594/PANGAEA.832121 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kaufman, Darrell S; Polyak, Leonid; Adler, Ruth E; Channell, James E T; Xuan, Chuang (2008): Dating late Quaternary planktonic foraminifer Neogloboquadrina pachyderma from the Arctic Ocean using amino acid racemization. Paleoceanography, 23(3), PA3224, https://doi.org/10.1029/2008PA001618 Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.832121 https://doi.org/10.1029/2008PA001618 2023-01-20T07:33:16Z The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were calibrated for the last 150 ka using 14C ages and the emerging Quaternary chronostratigraphy of Arctic Ocean sediments. An analysis of errors indicates realistic age uncertainties of about ±12% for Asp and ±17% for Glu. Fifty individual tests are sufficient to analyze multiple subsamples, identify outliers, and derive robust sample mean values. The new age equation can be applied to verify and refine age models for sediment cores elsewhere in the Arctic Ocean, a critical region for understanding the dynamics of global climate change. Dataset Arctic Arctic Arctic Ocean Climate change Foraminifera* Neogloboquadrina pachyderma Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean ENVELOPE(144.770330,-157.884000,87.091830,74.622500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were calibrated for the last 150 ka using 14C ages and the emerging Quaternary chronostratigraphy of Arctic Ocean sediments. An analysis of errors indicates realistic age uncertainties of about ±12% for Asp and ±17% for Glu. Fifty individual tests are sufficient to analyze multiple subsamples, identify outliers, and derive robust sample mean values. The new age equation can be applied to verify and refine age models for sediment cores elsewhere in the Arctic Ocean, a critical region for understanding the dynamics of global climate change. |
format |
Dataset |
author |
Kaufman, Darrell S Polyak, Leonid Adler, Ruth E Channell, James E T Xuan, Chuang |
spellingShingle |
Kaufman, Darrell S Polyak, Leonid Adler, Ruth E Channell, James E T Xuan, Chuang Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
author_facet |
Kaufman, Darrell S Polyak, Leonid Adler, Ruth E Channell, James E T Xuan, Chuang |
author_sort |
Kaufman, Darrell S |
title |
Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
title_short |
Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
title_full |
Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
title_fullStr |
Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
title_full_unstemmed |
Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean |
title_sort |
amino acid racemization of neogloboquadrina pachyderma from the arctic ocean |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.832121 https://doi.org/10.1594/PANGAEA.832121 |
op_coverage |
MEDIAN LATITUDE: 80.932147 * MEDIAN LONGITUDE: 178.454656 * SOUTH-BOUND LATITUDE: 74.622500 * WEST-BOUND LONGITUDE: 144.770330 * NORTH-BOUND LATITUDE: 87.091830 * EAST-BOUND LONGITUDE: -157.884000 * DATE/TIME START: 1996-08-14T00:00:00 * DATE/TIME END: 2005-08-25T00:00:00 |
long_lat |
ENVELOPE(144.770330,-157.884000,87.091830,74.622500) |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Climate change Foraminifera* Neogloboquadrina pachyderma Planktonic foraminifera |
genre_facet |
Arctic Arctic Arctic Ocean Climate change Foraminifera* Neogloboquadrina pachyderma Planktonic foraminifera |
op_source |
Supplement to: Kaufman, Darrell S; Polyak, Leonid; Adler, Ruth E; Channell, James E T; Xuan, Chuang (2008): Dating late Quaternary planktonic foraminifer Neogloboquadrina pachyderma from the Arctic Ocean using amino acid racemization. Paleoceanography, 23(3), PA3224, https://doi.org/10.1029/2008PA001618 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.832121 https://doi.org/10.1594/PANGAEA.832121 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.832121 https://doi.org/10.1029/2008PA001618 |
_version_ |
1766298158524006400 |