Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period
Abstract Global deep-water circulation plays a crucial role in regulating long-term carbon storage in both the ocean and atmosphere. During the last glacial period, it is reported that this circulation slowed down, causing glacial intermediate water to descend to depths of 2,000 m in the Pacific. Th...
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SpringerOpen
2025-01-01
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| Series: | Progress in Earth and Planetary Science |
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| Online Access: | https://doi.org/10.1186/s40645-024-00675-2 |
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| author | Wei-Cheng Hsiung Yuan-Pin Chang Horng-Sheng Mii Ken Ikehara Toshiya Kanamatsu Hui-Ling Lin |
| author_facet | Wei-Cheng Hsiung Yuan-Pin Chang Horng-Sheng Mii Ken Ikehara Toshiya Kanamatsu Hui-Ling Lin |
| author_sort | Wei-Cheng Hsiung |
| collection | DOAJ |
| description | Abstract Global deep-water circulation plays a crucial role in regulating long-term carbon storage in both the ocean and atmosphere. During the last glacial period, it is reported that this circulation slowed down, causing glacial intermediate water to descend to depths of 2,000 m in the Pacific. This process is thought to be a key mechanism in restricting global deep-water circulation and reducing atmospheric carbon dioxide concentrations during glacial periods. Conversely, the emergence of a potential deep-water formation zone in the northwestern Pacific during deglaciation adds complexity to these circulation patterns. Addressing the scarcity of sedimentary records in the subtropical western Pacific for paleoceanographic reconstruction, sediment core YK15-01 PC13 (23.5°N, 124.24°E; southeast of Ishigaki Island at a depth of 2,520 m) used in this study, collected in 2015. By analyzing coexisting planktonic and benthic foraminifera, we have reconstructed radiocarbon ventilation ages in this region since the last glacial maximum. Our findings, including ventilation age records compiled from the Atlantic and Pacific Oceans, reveal opposing deep-water circulation patterns from the last glacial to the interglacial period, including during the Heinrich Event 1 (HE1) and Younger Dryas (YD). This supports the theory of a seesaw-like oscillation in ocean circulation. Furthermore, the improved ventilation observed during HE1 and YD suggests a contribution from deep water formed in the high-latitude Pacific, influenced by cooler climate conditions. This glacial North Pacific deep water, likely confined to the northwestern Pacific, has left its mark in the subtropical western Pacific records. This research enhances our understanding of deep-water circulation interactions between the Atlantic and Pacific and contributes new insights into the role of northern Pacific deep water in influencing atmospheric carbon dioxide variations during the last deglaciation. |
| format | Article |
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| institution | Kabale University |
| issn | 2197-4284 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
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| series | Progress in Earth and Planetary Science |
| spelling | doaj-art-0971622b5db343caae8cf43648b65eb12025-01-12T12:44:24ZengSpringerOpenProgress in Earth and Planetary Science2197-42842025-01-0112111410.1186/s40645-024-00675-2Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial periodWei-Cheng Hsiung0Yuan-Pin Chang1Horng-Sheng Mii2Ken Ikehara3Toshiya Kanamatsu4Hui-Ling Lin5Department of Earth and Planetary Sciences, Kyushu UniversityDepartment of Oceanography, National Sun Yat-sen UniversityDepartment of Earth Sciences, National Taiwan Normal UniversityGeological Survey of Japan, National Institute of Advanced Industrial Science and TechnologyJapan Agency for Marine-Earth Science and TechnologyDepartment of Oceanography, National Sun Yat-sen UniversityAbstract Global deep-water circulation plays a crucial role in regulating long-term carbon storage in both the ocean and atmosphere. During the last glacial period, it is reported that this circulation slowed down, causing glacial intermediate water to descend to depths of 2,000 m in the Pacific. This process is thought to be a key mechanism in restricting global deep-water circulation and reducing atmospheric carbon dioxide concentrations during glacial periods. Conversely, the emergence of a potential deep-water formation zone in the northwestern Pacific during deglaciation adds complexity to these circulation patterns. Addressing the scarcity of sedimentary records in the subtropical western Pacific for paleoceanographic reconstruction, sediment core YK15-01 PC13 (23.5°N, 124.24°E; southeast of Ishigaki Island at a depth of 2,520 m) used in this study, collected in 2015. By analyzing coexisting planktonic and benthic foraminifera, we have reconstructed radiocarbon ventilation ages in this region since the last glacial maximum. Our findings, including ventilation age records compiled from the Atlantic and Pacific Oceans, reveal opposing deep-water circulation patterns from the last glacial to the interglacial period, including during the Heinrich Event 1 (HE1) and Younger Dryas (YD). This supports the theory of a seesaw-like oscillation in ocean circulation. Furthermore, the improved ventilation observed during HE1 and YD suggests a contribution from deep water formed in the high-latitude Pacific, influenced by cooler climate conditions. This glacial North Pacific deep water, likely confined to the northwestern Pacific, has left its mark in the subtropical western Pacific records. This research enhances our understanding of deep-water circulation interactions between the Atlantic and Pacific and contributes new insights into the role of northern Pacific deep water in influencing atmospheric carbon dioxide variations during the last deglaciation.https://doi.org/10.1186/s40645-024-00675-2Deep-water circulationIntermediate waterVentilationRadiocarbon agesGlacial period |
| spellingShingle | Wei-Cheng Hsiung Yuan-Pin Chang Horng-Sheng Mii Ken Ikehara Toshiya Kanamatsu Hui-Ling Lin Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period Progress in Earth and Planetary Science Deep-water circulation Intermediate water Ventilation Radiocarbon ages Glacial period |
| title | Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period |
| title_full | Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period |
| title_fullStr | Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period |
| title_full_unstemmed | Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period |
| title_short | Reconstruction of bottom water ventilation changes in the West Philippine Sea during the last glacial-interglacial period |
| title_sort | reconstruction of bottom water ventilation changes in the west philippine sea during the last glacial interglacial period |
| topic | Deep-water circulation Intermediate water Ventilation Radiocarbon ages Glacial period |
| url | https://doi.org/10.1186/s40645-024-00675-2 |
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