Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides
The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W′). The variability in Mg/Ca...
Published in: | Geochemistry, Geophysics, Geosystems |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:1568 2023-05-15T17:34:21+02:00 Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides Anand, P. Elderfield, H. 2005-11-23 application/pdf http://eprints.esc.cam.ac.uk/1568/ http://eprints.esc.cam.ac.uk/1568/1/Anand,_Pallavi_and_Elderfield,_H._G3_6,11_%282005%29.pdf https://doi.org/10.1029/2004GC000811 en eng http://eprints.esc.cam.ac.uk/1568/1/Anand,_Pallavi_and_Elderfield,_H._G3_6,11_%282005%29.pdf Anand, P. and Elderfield, H. (2005) Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides. G3 Geochemistry Geophysics Geosystems, 6 (11). DOI https://doi.org/10.1029/2004GC000811 <https://doi.org/10.1029/2004GC000811> 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2005 ftucambridgeesc https://doi.org/10.1029/2004GC000811 2020-08-27T18:08:55Z The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W′). The variability in Mg/Ca and Sr/Ca within individual tests and chambers was determined by electron microprobe, and samples consisting of variable sample size were measured using inductively coupled plasma optical emission spectrometer (ICP-OES). Large compositional heterogeneity was found within individual chambers, and within the test as a whole, of the two species and the presence of regions with up to ∼10 mmol/mol Mg/Ca, especially in G. bulloides. Mean Mg/Ca decreases in successive chambers of G. bulloides (especially the 300–355 μm fraction) and is accompanied by decreasing variance but is not statistical significant. Sr/Ca is much more homogeneously distributed, with a normal distribution, and shows no differences from chamber to chamber. The variability of Mg/Ca and Sr/Ca decreases with increasing sample size, from single to five to twenty tests per sample, approximately as for a normal distribution, with greater variability for G. bulloides than for G. truncatulinoides, equivalent to uncertainties in temperature (n = 20) of 1.1°C and 0.7°C for the two species within the whole of the sediment mixed layer. Article in Journal/Newspaper North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications Geochemistry, Geophysics, Geosystems 6 11 n/a n/a |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Anand, P. Elderfield, H. Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W′). The variability in Mg/Ca and Sr/Ca within individual tests and chambers was determined by electron microprobe, and samples consisting of variable sample size were measured using inductively coupled plasma optical emission spectrometer (ICP-OES). Large compositional heterogeneity was found within individual chambers, and within the test as a whole, of the two species and the presence of regions with up to ∼10 mmol/mol Mg/Ca, especially in G. bulloides. Mean Mg/Ca decreases in successive chambers of G. bulloides (especially the 300–355 μm fraction) and is accompanied by decreasing variance but is not statistical significant. Sr/Ca is much more homogeneously distributed, with a normal distribution, and shows no differences from chamber to chamber. The variability of Mg/Ca and Sr/Ca decreases with increasing sample size, from single to five to twenty tests per sample, approximately as for a normal distribution, with greater variability for G. bulloides than for G. truncatulinoides, equivalent to uncertainties in temperature (n = 20) of 1.1°C and 0.7°C for the two species within the whole of the sediment mixed layer. |
format |
Article in Journal/Newspaper |
author |
Anand, P. Elderfield, H. |
author_facet |
Anand, P. Elderfield, H. |
author_sort |
Anand, P. |
title |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_short |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_full |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_fullStr |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_full_unstemmed |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_sort |
variability of mg/ca and sr/ca between and within the planktonic foraminifers globigerina bulloides and globorotalia truncatulinoides |
publishDate |
2005 |
url |
http://eprints.esc.cam.ac.uk/1568/ http://eprints.esc.cam.ac.uk/1568/1/Anand,_Pallavi_and_Elderfield,_H._G3_6,11_%282005%29.pdf https://doi.org/10.1029/2004GC000811 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://eprints.esc.cam.ac.uk/1568/1/Anand,_Pallavi_and_Elderfield,_H._G3_6,11_%282005%29.pdf Anand, P. and Elderfield, H. (2005) Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides. G3 Geochemistry Geophysics Geosystems, 6 (11). DOI https://doi.org/10.1029/2004GC000811 <https://doi.org/10.1029/2004GC000811> |
op_doi |
https://doi.org/10.1029/2004GC000811 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
6 |
container_issue |
11 |
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n/a |
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n/a |
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1766133147132493824 |