Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific
The orbital-scale variations in biogenic CaCO3 and opal abundance in two piston cores collected in the central equatorial Pacific (core PC5101 from a southern site at _ and core PC5103 from a northern site at _ were compared to assess latitudinal differences. The correlation between the oxygen isoto...
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ftdoajarticles:oai:doaj.org/article:533abfc0d07d408c81ec950c2c286d98 2023-05-15T18:01:03+02:00 Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific Boo-Keun Khim Chan Min Yoo Hyung Jeek Kim Kiseong Hyeong Hiroyuki Takata Sunghan Kim Sang Bum Chi and Young Tak Ko 2015-01-01T00:00:00Z https://doaj.org/article/533abfc0d07d408c81ec950c2c286d98 EN eng Springer http://tao.cgu.org.tw/pdf/v264p441.pdf https://doaj.org/toc/1017-0839 https://doaj.org/toc/2311-7680 1017-0839 2311-7680 10.3319/TAO.2015.02.09.01(Oc) https://doaj.org/article/533abfc0d07d408c81ec950c2c286d98 Terrestrial, Atmospheric and Oceanic Sciences, Vol 26, Iss 4, p 441 (2015) geophysics geology atmospheric science space science oceanic science hydrology QE1-996.5 Geophysics. Cosmic physics QC801-809 article 2015 ftdoajarticles 2022-12-30T23:54:55Z The orbital-scale variations in biogenic CaCO3 and opal abundance in two piston cores collected in the central equatorial Pacific (core PC5101 from a southern site at _ and core PC5103 from a northern site at _ were compared to assess latitudinal differences. The correlation between the oxygen isotope stratigraphy of planktonic foraminifera (Globigerinoides sacculifer) of PC5103 with the LR04 stacks provides the age of PC5103 to be approximately 950 ka. The age of PC5103 was further refined by correlating the CaCO3 content with the well-dated core RC11-210. The age of PC5101 was also constrained by the same CaCO3 chronostratigraphic correlation with RC11-210, resulting in an age of approximately 650 ka. Distinct orbital-scale series of CaCO3 and opal variations appear to be parallel between the two cores during the past 600 ka, which are controlled mainly by eccentricity with an approximate periodicity of 100 ka. It is worth noting that the biogenic CaCO3 and opal deposition patterns in the two cores differ between interglacial and glacial periods. During interglacial periods the biogenic opal content is higher in the southern core than in the northern core, which corresponds with the present-day condition. In contrast the CaCO3 content is higher in the northern core, which is contradictory to the present-day northward decreasing CaCO3 deposition pattern from the Equator. The collection site of PC5101 is approximately 350 m deeper than that of PC5103, which significantly promotes CaCO3 dissolution and causes unexpectedly high CaCO3 content at the northern site in contrast to the biogenic opal content. Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Pacific |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
geophysics geology atmospheric science space science oceanic science hydrology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
geophysics geology atmospheric science space science oceanic science hydrology QE1-996.5 Geophysics. Cosmic physics QC801-809 Boo-Keun Khim Chan Min Yoo Hyung Jeek Kim Kiseong Hyeong Hiroyuki Takata Sunghan Kim Sang Bum Chi and Young Tak Ko Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
topic_facet |
geophysics geology atmospheric science space science oceanic science hydrology QE1-996.5 Geophysics. Cosmic physics QC801-809 |
description |
The orbital-scale variations in biogenic CaCO3 and opal abundance in two piston cores collected in the central equatorial Pacific (core PC5101 from a southern site at _ and core PC5103 from a northern site at _ were compared to assess latitudinal differences. The correlation between the oxygen isotope stratigraphy of planktonic foraminifera (Globigerinoides sacculifer) of PC5103 with the LR04 stacks provides the age of PC5103 to be approximately 950 ka. The age of PC5103 was further refined by correlating the CaCO3 content with the well-dated core RC11-210. The age of PC5101 was also constrained by the same CaCO3 chronostratigraphic correlation with RC11-210, resulting in an age of approximately 650 ka. Distinct orbital-scale series of CaCO3 and opal variations appear to be parallel between the two cores during the past 600 ka, which are controlled mainly by eccentricity with an approximate periodicity of 100 ka. It is worth noting that the biogenic CaCO3 and opal deposition patterns in the two cores differ between interglacial and glacial periods. During interglacial periods the biogenic opal content is higher in the southern core than in the northern core, which corresponds with the present-day condition. In contrast the CaCO3 content is higher in the northern core, which is contradictory to the present-day northward decreasing CaCO3 deposition pattern from the Equator. The collection site of PC5101 is approximately 350 m deeper than that of PC5103, which significantly promotes CaCO3 dissolution and causes unexpectedly high CaCO3 content at the northern site in contrast to the biogenic opal content. |
format |
Article in Journal/Newspaper |
author |
Boo-Keun Khim Chan Min Yoo Hyung Jeek Kim Kiseong Hyeong Hiroyuki Takata Sunghan Kim Sang Bum Chi and Young Tak Ko |
author_facet |
Boo-Keun Khim Chan Min Yoo Hyung Jeek Kim Kiseong Hyeong Hiroyuki Takata Sunghan Kim Sang Bum Chi and Young Tak Ko |
author_sort |
Boo-Keun Khim |
title |
Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
title_short |
Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
title_full |
Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
title_fullStr |
Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
title_full_unstemmed |
Biogenic CaCO3 and Opal Depositions and Their Latitudinal Comparison During the Past 600 ka in the Central Equatorial Pacific |
title_sort |
biogenic caco3 and opal depositions and their latitudinal comparison during the past 600 ka in the central equatorial pacific |
publisher |
Springer |
publishDate |
2015 |
url |
https://doaj.org/article/533abfc0d07d408c81ec950c2c286d98 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Terrestrial, Atmospheric and Oceanic Sciences, Vol 26, Iss 4, p 441 (2015) |
op_relation |
http://tao.cgu.org.tw/pdf/v264p441.pdf https://doaj.org/toc/1017-0839 https://doaj.org/toc/2311-7680 1017-0839 2311-7680 10.3319/TAO.2015.02.09.01(Oc) https://doaj.org/article/533abfc0d07d408c81ec950c2c286d98 |
_version_ |
1766170371836346368 |