Paleoceanographic data based on radiolarian assemblages since the late Miocene from the western tropical Indian Ocean at ODP Site 115-710
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2026
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| _version_ | 1867170480134291456 |
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| author | Kamikuri, Shin-Ichi Matsuzaki, Kenji M |
| author_facet | Kamikuri, Shin-Ichi Matsuzaki, Kenji M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We present radiolarian assemblages data since the late Miocene (~10-0 Ma) at Ocean Drilling Program Site 710 (4°18.7'S and 60°58.8'E; water depth, 3812 m) in the western tropical Indian Ocean for reconstructing the history of Sea Surface temperature (SST), Indonesian Throughflow (ITF), biological productivity, and Antarctic Intermediate Water/Circumpolar Deep Water (AAIW/CDW). A total of 99 sediment samples were used to characterize radiolarian assemblages in this study. The geomagnetic time scale was adopted from the Geologic Time Scale 2012 (Gradstein et al., 2012) to estimate the age of each sample. Here radiolarian percentages data and radiolarian based paleoceanographic data (SST, ITF, biological productivity, and AAIW/CDW) from Site 710 are uploaded. The SST were estimated based on extant radiolarian species using the equation of Matsuzaki et al. (2020, Geology). To monitor surface ITF changes, the relative abundances of three taxa (Zygocircus spp., Didymocyrtis tetrathalamus, and Dictyocoryne spp.) were used in this study. To monitor thermocline ITF changes, Botryostrobus scutum was used. To trace biological productivity, we used the WADE index of Lazarus et al. (2006, Marine Micropaleontology). However, note that our study modifies the original WADE index by inverting the ratio for ease of interpretation. To monitor AAIW/CDW changes, the relative abundances of Cycladophora bicornis, Lithelius haeckelispiralis, and Larcopyle weddellium were used in this study. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_977787 |
| institution | PANGAEA |
| language | en |
| publishDate | 2026 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Paleoceanographic data based on radiolarian assemblages since the late Miocene from the western tropical Indian Ocean at ODP Site 115-710 Kamikuri, Shin-Ichi Matsuzaki, Kenji M Antarctic Intermediate Water; biological productivity; Indonesian Throughflow; ODP Site 710; Radiolarian key species; Sea surface temperature We present radiolarian assemblages data since the late Miocene (~10-0 Ma) at Ocean Drilling Program Site 710 (4°18.7'S and 60°58.8'E; water depth, 3812 m) in the western tropical Indian Ocean for reconstructing the history of Sea Surface temperature (SST), Indonesian Throughflow (ITF), biological productivity, and Antarctic Intermediate Water/Circumpolar Deep Water (AAIW/CDW). A total of 99 sediment samples were used to characterize radiolarian assemblages in this study. The geomagnetic time scale was adopted from the Geologic Time Scale 2012 (Gradstein et al., 2012) to estimate the age of each sample. Here radiolarian percentages data and radiolarian based paleoceanographic data (SST, ITF, biological productivity, and AAIW/CDW) from Site 710 are uploaded. The SST were estimated based on extant radiolarian species using the equation of Matsuzaki et al. (2020, Geology). To monitor surface ITF changes, the relative abundances of three taxa (Zygocircus spp., Didymocyrtis tetrathalamus, and Dictyocoryne spp.) were used in this study. To monitor thermocline ITF changes, Botryostrobus scutum was used. To trace biological productivity, we used the WADE index of Lazarus et al. (2006, Marine Micropaleontology). However, note that our study modifies the original WADE index by inverting the ratio for ease of interpretation. To monitor AAIW/CDW changes, the relative abundances of Cycladophora bicornis, Lithelius haeckelispiralis, and Larcopyle weddellium were used in this study. |
| title | Paleoceanographic data based on radiolarian assemblages since the late Miocene from the western tropical Indian Ocean at ODP Site 115-710 |
| topic | Antarctic Intermediate Water; biological productivity; Indonesian Throughflow; ODP Site 710; Radiolarian key species; Sea surface temperature |
| url | https://doi.org/10.1594/PANGAEA.977787 |