Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications
The East Asian monsoon system influences the local oceanographic and climatic conditions of South China Sea (SCS), making the habitat depths of planktonic foraminifera (PF) specific for this region. The previous paleo-ocean reconstructions of SCS have been based on calcification habitat depths deriv...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/32129 2023-05-15T18:00:33+02:00 Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications Ladigbolu, Ismail Adejare Li, Hongliang Li, Baohua Wiesner, Martin G. Zhang, Jingjing Sun, Lin Ran, Lihua Lu, Shaolei Ye, Ying Chen, Jianfang 2020-06-01 http://ir.nigpas.ac.cn/handle/332004/32129 https://doi.org/10.1016/j.marmicro.2020.101878 英语 eng ELSEVIER MARINE MICROPALEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/32129 doi:10.1016/j.marmicro.2020.101878 East Asian monsoon Planktonic foraminifera Apparent calcification depth Thermal gradients Stable isotopes South China Sea OXYGEN ISOTOPIC COMPOSITION GLOBIGERINOIDES-SACCULIFER BRADY CHINA SEA VERTICAL-DISTRIBUTION SEASONAL-VARIATIONS STABLE-ISOTOPES CARBON-ISOTOPE SEDIMENT TRAPS ASIAN MONSOON PANAMA BASIN Paleontology 期刊论文 2020 ftchinacscnigpas https://doi.org/10.1016/j.marmicro.2020.101878 2020-10-30T01:05:20Z The East Asian monsoon system influences the local oceanographic and climatic conditions of South China Sea (SCS), making the habitat depths of planktonic foraminifera (PF) specific for this region. The previous paleo-ocean reconstructions of SCS have been based on calcification habitat depths derived from other oceans, which may have affected the accuracy of interpretations. In this study, the calcification depths of Globigerinoides ruber, Globigerinoides sacculifer, and Neogloboquadrina dutertrei from sediment traps deployed at 1000 m depth off southwest Hainan Island from July 2012 to April 2013 were analyzed with regard to the stable isotopes of oxygen (delta O-18) and carbon (delta C-13) to calculate their regional apparent calcification depths (ACDs) with the overall aim to improve the reconstruction of the upper ocean thermal structure. ACDs and temperature estimated from foraminifera delta O-18 ranged from 0 to 42 m and 25 degrees C for G. ruber, 30-65 m and 23.3 degrees C for G. sacculifer, and 75-100 m and 20.3 degrees C for N. dutertrei, respectively. The difference between the thermocline-species (N. dutertrei) and mixed-layer species (G. ruber and G. sacculifer) delta O-18 (Delta delta O-18(Th-ML)) and the temperature (Delta T) shows water column stratification. The periods of lower and higher Delta T and Delta delta O-18 were in phase with the changes in regional overlying wind speed. Additionally, this study reveals that N. dutertrei lives and calcifies its shells within the base of the mixed-layer depth (MLD) and upper thermocline depth in SCS. Overall, the results from this study provide a new insight to understand the mixed-layer and thermocline depth in the northern SCS. Report Planktonic foraminifera Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Marine Micropaleontology 158 101878 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
East Asian monsoon Planktonic foraminifera Apparent calcification depth Thermal gradients Stable isotopes South China Sea OXYGEN ISOTOPIC COMPOSITION GLOBIGERINOIDES-SACCULIFER BRADY CHINA SEA VERTICAL-DISTRIBUTION SEASONAL-VARIATIONS STABLE-ISOTOPES CARBON-ISOTOPE SEDIMENT TRAPS ASIAN MONSOON PANAMA BASIN Paleontology |
spellingShingle |
East Asian monsoon Planktonic foraminifera Apparent calcification depth Thermal gradients Stable isotopes South China Sea OXYGEN ISOTOPIC COMPOSITION GLOBIGERINOIDES-SACCULIFER BRADY CHINA SEA VERTICAL-DISTRIBUTION SEASONAL-VARIATIONS STABLE-ISOTOPES CARBON-ISOTOPE SEDIMENT TRAPS ASIAN MONSOON PANAMA BASIN Paleontology Ladigbolu, Ismail Adejare Li, Hongliang Li, Baohua Wiesner, Martin G. Zhang, Jingjing Sun, Lin Ran, Lihua Lu, Shaolei Ye, Ying Chen, Jianfang Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
topic_facet |
East Asian monsoon Planktonic foraminifera Apparent calcification depth Thermal gradients Stable isotopes South China Sea OXYGEN ISOTOPIC COMPOSITION GLOBIGERINOIDES-SACCULIFER BRADY CHINA SEA VERTICAL-DISTRIBUTION SEASONAL-VARIATIONS STABLE-ISOTOPES CARBON-ISOTOPE SEDIMENT TRAPS ASIAN MONSOON PANAMA BASIN Paleontology |
description |
The East Asian monsoon system influences the local oceanographic and climatic conditions of South China Sea (SCS), making the habitat depths of planktonic foraminifera (PF) specific for this region. The previous paleo-ocean reconstructions of SCS have been based on calcification habitat depths derived from other oceans, which may have affected the accuracy of interpretations. In this study, the calcification depths of Globigerinoides ruber, Globigerinoides sacculifer, and Neogloboquadrina dutertrei from sediment traps deployed at 1000 m depth off southwest Hainan Island from July 2012 to April 2013 were analyzed with regard to the stable isotopes of oxygen (delta O-18) and carbon (delta C-13) to calculate their regional apparent calcification depths (ACDs) with the overall aim to improve the reconstruction of the upper ocean thermal structure. ACDs and temperature estimated from foraminifera delta O-18 ranged from 0 to 42 m and 25 degrees C for G. ruber, 30-65 m and 23.3 degrees C for G. sacculifer, and 75-100 m and 20.3 degrees C for N. dutertrei, respectively. The difference between the thermocline-species (N. dutertrei) and mixed-layer species (G. ruber and G. sacculifer) delta O-18 (Delta delta O-18(Th-ML)) and the temperature (Delta T) shows water column stratification. The periods of lower and higher Delta T and Delta delta O-18 were in phase with the changes in regional overlying wind speed. Additionally, this study reveals that N. dutertrei lives and calcifies its shells within the base of the mixed-layer depth (MLD) and upper thermocline depth in SCS. Overall, the results from this study provide a new insight to understand the mixed-layer and thermocline depth in the northern SCS. |
format |
Report |
author |
Ladigbolu, Ismail Adejare Li, Hongliang Li, Baohua Wiesner, Martin G. Zhang, Jingjing Sun, Lin Ran, Lihua Lu, Shaolei Ye, Ying Chen, Jianfang |
author_facet |
Ladigbolu, Ismail Adejare Li, Hongliang Li, Baohua Wiesner, Martin G. Zhang, Jingjing Sun, Lin Ran, Lihua Lu, Shaolei Ye, Ying Chen, Jianfang |
author_sort |
Ladigbolu, Ismail Adejare |
title |
Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
title_short |
Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
title_full |
Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
title_fullStr |
Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
title_full_unstemmed |
Calcification depths and temperatures of planktonic foraminifera off southwest Hainan Island and their paleoceanographic implications |
title_sort |
calcification depths and temperatures of planktonic foraminifera off southwest hainan island and their paleoceanographic implications |
publisher |
ELSEVIER |
publishDate |
2020 |
url |
http://ir.nigpas.ac.cn/handle/332004/32129 https://doi.org/10.1016/j.marmicro.2020.101878 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
MARINE MICROPALEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/32129 doi:10.1016/j.marmicro.2020.101878 |
op_doi |
https://doi.org/10.1016/j.marmicro.2020.101878 |
container_title |
Marine Micropaleontology |
container_volume |
158 |
container_start_page |
101878 |
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1766169695203885056 |