Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments
Abstract A transfer function has been established to quantify the dissolution of diatom silica in Southern Ocean sediments. The relationship between the amount of silica dissolution and changes in diatom species distribution is built by controlled progressive dissolution of biogenic silica in five r...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1992
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/0033-5894(92)90073-r http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400023814 |
id |
crcambridgeupr:10.1016/0033-5894(92)90073-r |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1016/0033-5894(92)90073-r 2024-06-09T07:49:42+00:00 Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments Pichon, Jean-Jacques Bareille, Gilles Labracherie, Monique Labeyrie, Laurent D. Baudrimont, Annick Turon, Jean-Louis 1992 http://dx.doi.org/10.1016/0033-5894(92)90073-r http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400023814 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 37, issue 3, page 361-378 ISSN 0033-5894 1096-0287 journal-article 1992 crcambridgeupr https://doi.org/10.1016/0033-5894(92)90073-r 2024-05-15T13:16:04Z Abstract A transfer function has been established to quantify the dissolution of diatom silica in Southern Ocean sediments. The relationship between the amount of silica dissolution and changes in diatom species distribution is built by controlled progressive dissolution of biogenic silica in five recent sediment samples from box-core tops, each representative of a modern diatom species sediment assemblage. The amount of dissolved silica was measured for each experiment. The resulting data set of species abundances (42 samples containing 32 diatom species and 2 silicoflagellate genera) was added to the modern data base of diatom species distributed over the Southern Ocean (124 core tops). Q-mode factor analysis individualizes four factors explaining 83% of the variance. The first three factors are controlled by surface water properties (mostly temperature). The fourth factor is the only one correlated with loss of silica in the reference samples ( R = 0.900). We quantified the dissolution factor using this correlation: superficial sediments of the Southeast Indian Ocean are characterized, from low to high latitudes, by a decrease in silica loss by dissolution (from >50 to 10%) from the Subantarctic Zone (40°S) to around 55°S, followed by an increase of silica loss to values larger than 60% between 63° and 68°S. Application of the dissolution factor in two cores from the Southern Ocean (≈44° and 55°S) shows enhanced opal dissolution during the last glaciation, particularly during Emiliani's stage 3 (from 40,000 to 30,000 yr B.P.). Article in Journal/Newspaper Southern Ocean Cambridge University Press Southern Ocean Indian Quaternary Research 37 3 361 378 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract A transfer function has been established to quantify the dissolution of diatom silica in Southern Ocean sediments. The relationship between the amount of silica dissolution and changes in diatom species distribution is built by controlled progressive dissolution of biogenic silica in five recent sediment samples from box-core tops, each representative of a modern diatom species sediment assemblage. The amount of dissolved silica was measured for each experiment. The resulting data set of species abundances (42 samples containing 32 diatom species and 2 silicoflagellate genera) was added to the modern data base of diatom species distributed over the Southern Ocean (124 core tops). Q-mode factor analysis individualizes four factors explaining 83% of the variance. The first three factors are controlled by surface water properties (mostly temperature). The fourth factor is the only one correlated with loss of silica in the reference samples ( R = 0.900). We quantified the dissolution factor using this correlation: superficial sediments of the Southeast Indian Ocean are characterized, from low to high latitudes, by a decrease in silica loss by dissolution (from >50 to 10%) from the Subantarctic Zone (40°S) to around 55°S, followed by an increase of silica loss to values larger than 60% between 63° and 68°S. Application of the dissolution factor in two cores from the Southern Ocean (≈44° and 55°S) shows enhanced opal dissolution during the last glaciation, particularly during Emiliani's stage 3 (from 40,000 to 30,000 yr B.P.). |
format |
Article in Journal/Newspaper |
author |
Pichon, Jean-Jacques Bareille, Gilles Labracherie, Monique Labeyrie, Laurent D. Baudrimont, Annick Turon, Jean-Louis |
spellingShingle |
Pichon, Jean-Jacques Bareille, Gilles Labracherie, Monique Labeyrie, Laurent D. Baudrimont, Annick Turon, Jean-Louis Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
author_facet |
Pichon, Jean-Jacques Bareille, Gilles Labracherie, Monique Labeyrie, Laurent D. Baudrimont, Annick Turon, Jean-Louis |
author_sort |
Pichon, Jean-Jacques |
title |
Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
title_short |
Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
title_full |
Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
title_fullStr |
Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
title_full_unstemmed |
Quantification of the Biogenic Silica Dissolution in Southern Ocean Sediments |
title_sort |
quantification of the biogenic silica dissolution in southern ocean sediments |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1016/0033-5894(92)90073-r http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949290073R?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400023814 |
geographic |
Southern Ocean Indian |
geographic_facet |
Southern Ocean Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Quaternary Research volume 37, issue 3, page 361-378 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(92)90073-r |
container_title |
Quaternary Research |
container_volume |
37 |
container_issue |
3 |
container_start_page |
361 |
op_container_end_page |
378 |
_version_ |
1801382460336898048 |