Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise
Plain Language Summary The Sr and Nd isotopic compositions of siliciclastic sediments and the Nd isotopic compositions of planktonic foraminifera are investigated in sediment trap samples collected in 2015 at water depths of 500 and 2,800m to (1) track the seasonal changes in the sources and transpo...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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AMER GEOPHYSICAL UNION
2018
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Online Access: | http://ir.qdio.ac.cn/handle/337002/160469 http://ir.qdio.ac.cn/handle/337002/160470 https://doi.org/10.1029/2018JC014274 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/160470 2023-05-15T18:00:23+02:00 Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise Xu, Zhaokai Li, Tiegang Colin, Christophe Clift, Peter D. Sun, Rongtao Yu, Zhaojie Wan, Shiming Lim, Dhongil 2018-09-01 http://ir.qdio.ac.cn/handle/337002/160469 http://ir.qdio.ac.cn/handle/337002/160470 https://doi.org/10.1029/2018JC014274 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS http://ir.qdio.ac.cn/handle/337002/160469 http://ir.qdio.ac.cn/handle/337002/160470 doi:10.1029/2018JC014274 Sr and Nd isotopes mooring system western Philippine Sea foraminifera dust sources East Asian monsoon Oceanography 期刊论文 2018 ftchinacasciocas https://doi.org/10.1029/2018JC014274 2022-06-27T05:40:26Z Plain Language Summary The Sr and Nd isotopic compositions of siliciclastic sediments and the Nd isotopic compositions of planktonic foraminifera are investigated in sediment trap samples collected in 2015 at water depths of 500 and 2,800m to (1) track the seasonal changes in the sources and transport patterns of siliciclastic sediments to Benham Rise, (2) constrain the Nd isotopic compositions of the planktonic foraminifera throughout the water column, and (3) assess the influences of lithogenic inputs on the Nd isotopic compositions of the water masses. We demonstrate that volcanic matter and eolian dust are derived primarily from Luzon Island and the Ordos Desert, respectively. In addition, we show that reduced precipitation over Luzon Island and the weakened East Asian winter monsoon intensity result in mass fluxes from Luzon Island and the eastern Asian deserts to the sea, respectively, that are weaker in the winter than in the spring. Furthermore, the epsilon(Nd) values of the foraminifera collected at a water depth of 500m change slightly in 2015, suggesting negligible impacts of lithogenic Nd inputs characterized by significant seasonal flux variations. In contrast, the epsilon(Nd) values of the planktonic foraminifera collected at a water depth of 2,800m are systematically more radiogenic and appear to display seasonal variability. Such results suggest the rapid modification of epsilon(Nd) values during the settling of planktonic foraminifera by the precipitation of Mn coatings derived from water masses at deposition depths, with greater contributions of colder water masses originating from the volcanic Luzon Island margin during the winter. Based on the first report of Sr-Nd isotopic compositions of siliciclastic sediments and Nd isotopic compositions of planktonic foraminifera in sediment trap samples collected from the western Philippine Sea in 2015 at water depths of 500 and 2,800m together with the relevant current information, we try to recover the potential linkages between the East Asian winter ... Report Planktonic foraminifera Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Journal of Geophysical Research: Oceans 123 9 6688 6702 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Sr and Nd isotopes mooring system western Philippine Sea foraminifera dust sources East Asian monsoon Oceanography |
spellingShingle |
Sr and Nd isotopes mooring system western Philippine Sea foraminifera dust sources East Asian monsoon Oceanography Xu, Zhaokai Li, Tiegang Colin, Christophe Clift, Peter D. Sun, Rongtao Yu, Zhaojie Wan, Shiming Lim, Dhongil Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
topic_facet |
Sr and Nd isotopes mooring system western Philippine Sea foraminifera dust sources East Asian monsoon Oceanography |
description |
Plain Language Summary The Sr and Nd isotopic compositions of siliciclastic sediments and the Nd isotopic compositions of planktonic foraminifera are investigated in sediment trap samples collected in 2015 at water depths of 500 and 2,800m to (1) track the seasonal changes in the sources and transport patterns of siliciclastic sediments to Benham Rise, (2) constrain the Nd isotopic compositions of the planktonic foraminifera throughout the water column, and (3) assess the influences of lithogenic inputs on the Nd isotopic compositions of the water masses. We demonstrate that volcanic matter and eolian dust are derived primarily from Luzon Island and the Ordos Desert, respectively. In addition, we show that reduced precipitation over Luzon Island and the weakened East Asian winter monsoon intensity result in mass fluxes from Luzon Island and the eastern Asian deserts to the sea, respectively, that are weaker in the winter than in the spring. Furthermore, the epsilon(Nd) values of the foraminifera collected at a water depth of 500m change slightly in 2015, suggesting negligible impacts of lithogenic Nd inputs characterized by significant seasonal flux variations. In contrast, the epsilon(Nd) values of the planktonic foraminifera collected at a water depth of 2,800m are systematically more radiogenic and appear to display seasonal variability. Such results suggest the rapid modification of epsilon(Nd) values during the settling of planktonic foraminifera by the precipitation of Mn coatings derived from water masses at deposition depths, with greater contributions of colder water masses originating from the volcanic Luzon Island margin during the winter. Based on the first report of Sr-Nd isotopic compositions of siliciclastic sediments and Nd isotopic compositions of planktonic foraminifera in sediment trap samples collected from the western Philippine Sea in 2015 at water depths of 500 and 2,800m together with the relevant current information, we try to recover the potential linkages between the East Asian winter ... |
format |
Report |
author |
Xu, Zhaokai Li, Tiegang Colin, Christophe Clift, Peter D. Sun, Rongtao Yu, Zhaojie Wan, Shiming Lim, Dhongil |
author_facet |
Xu, Zhaokai Li, Tiegang Colin, Christophe Clift, Peter D. Sun, Rongtao Yu, Zhaojie Wan, Shiming Lim, Dhongil |
author_sort |
Xu, Zhaokai |
title |
Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
title_short |
Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
title_full |
Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
title_fullStr |
Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
title_full_unstemmed |
Seasonal Variations in the Siliciclastic Fluxes to the Western Philippine Sea and Their Impacts on Seawater epsilon(Nd) Values Inferred From 1Year of In Situ Observations Above Benham Rise |
title_sort |
seasonal variations in the siliciclastic fluxes to the western philippine sea and their impacts on seawater epsilon(nd) values inferred from 1year of in situ observations above benham rise |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2018 |
url |
http://ir.qdio.ac.cn/handle/337002/160469 http://ir.qdio.ac.cn/handle/337002/160470 https://doi.org/10.1029/2018JC014274 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS http://ir.qdio.ac.cn/handle/337002/160469 http://ir.qdio.ac.cn/handle/337002/160470 doi:10.1029/2018JC014274 |
op_doi |
https://doi.org/10.1029/2018JC014274 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
9 |
container_start_page |
6688 |
op_container_end_page |
6702 |
_version_ |
1766169450013261824 |