Occurrences of fossil benthic foraminifera in sediment core PC-11
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2025
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| _version_ | 1867170128284614656 |
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| author | Takata, Hiroyuki Chun, Jong-Hwa Cheong, Daekyo Khim, Boo-Keun |
| author_facet | Takata, Hiroyuki Chun, Jong-Hwa Cheong, Daekyo Khim, Boo-Keun |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We investigated fossil planktonic foraminifera from cores ND-02 (Nakdong River delta) and PC-11 (inner shelf off southeast Korea), to assess millennial-scale variations in the surface oceanography. In addition, we also analyzed benthic foraminiferal fauna in core PC-11. The coiling ratio of Neogloboquadrina pachyderma shows five millennial-scale near-cyclic variations (~8.7-8.3, ~7.5-6.2, ~4.7, ~2.8 and ~0.5 ka) since ~9 ka. These variations are similar to warm-water diatom variations at the Oki Ridge where a cyclicity of ~1.6 kyr is present, possibly associated with a Bond event. By contrast, the near-cyclic variations in our planktonic foraminiferal record were not fully consistent with the reported intensity variations of the Tsushima Warm Current in the East Asian margin and the warm Kuroshio Current in the Northwest Pacific. Our records from southeast Korea seem to reflect the more regional oceanographic variations in the marginal seas of East Asia. We suggest that the coastal upwelling of the subsurface cold water along the southeast coast of Korea plays an important role in generating near-cyclic variations of warm-water biota. The occurrence of the bathyal benthic foraminifera, such as Eilohedra nipponica and Psuedoparrella naraensis in core PC-11 also supports the scenario of the upwelling of subsurface water into the shallower depths at the timing of the more common sinistral specimens of N. pachyderma than the dextral specimens that implies the more intense upwelling. These variations may have a connection to the Bond event periodicity in the North Atlantic Ocean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_973856 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Occurrences of fossil benthic foraminifera in sediment core PC-11 Takata, Hiroyuki Chun, Jong-Hwa Cheong, Daekyo Khim, Boo-Keun AGE; Ammonia beccarii; Ammonia inflata; Ammonia japonica; Ammonia ketienziensis angluata; Amphicoryna sp.; Angulogerina ikebei; Anomalinoides sp.; Astrononion sp.; Benthic foraminifera; Bolivina cf. decussata; Bolivina decussata; Bolivina humilis; Bolivina pseudoplicata; Bolivina robusta; Bolivina sp.; Brizalina cf. striatula; Brizalina pacifica; Brizalina striatula; Buccella frigida; Bulimina marginata; Bulimina nojimaensis; Bulimina tenuata; Buliminella elegantissima; Buliminella exilis; Cancris auriculus; Cassidulina norvangi; Cassidulinoides akitaensis; Cibicides cf. lobatulus; Cibicides cf. refulgens; Cibicides lobatulus; Cibicidoides sp.; Counting >63 µm fraction; Cyclogyra planorbis; Dentalina sp.; DEPTH, sediment/rock; Discorbinella convexa; Discorbinella sp.; Discorbis sp.; East coast of Korea; Eilohedra nipponica; Elphidium advenum; Elphidium crispum; Elphidium excavaum forma clavata; Elphidium excavaum forma excavata; Elphidium jenseni; Elphidium kusiroense; Elphidium reticulosum; Elphidium somaense; Elphidium sp.; Elphidium subarcticum; Elphidium subincertum; Fissurina spp.; Foraminifera, benthic, total; Foraminifera, benthic agglutinated; Foraminifera, benthic hyaline; Fursenkoina sp.; Gaudryina sp.; Gavelinopsis sp.; Geminospira simaensis; Glabratella spp.; Globobulimina auriculata; Globocassidulina sp.; Gyroidinoides sp.; Hanzawaia nipponica; Haynesina sp.; Hoeglundina elegans; Hyalinea balthica; Hyalinea sp.; KIGAM2011-SG_PC-11; Lagenammina sp.; Lagena spp.; Lenticulina sp.; Melonis sp.; Miliolinella sp.; Neoconorbina stachi; Nodosaria sp.; Nonionella stella; Nonionellina sp.; Nonion manpukuziensis; Oolina hexagona; Oolina melo; Oridorsalis sp.; Paracassidulina neocarinata; Pararotalia nipponica; Patellina sp.; PC; Piston corer; Planocassidulina sp.; Planocassidulina yabei; Planoglabratella opercularis; Planoglabratella sp.; Planoglabratella subopercularis; Polymorphina sp.; Pseudononion japonicum; Pseudoparrella naraensis; Pseudoparrella tamana; Pseudorotalia gaimardii compressiuscula; Pullenia apertura; Pullenia sp.; Quinqueloculina akneriana; Quinqueloculina elongata; Quinqueloculina seminulum; Quinqueloculina sp.; Rectobolivina raphana; Rosalina australis; Rosalina bradyi; Rosalina sp.; Rutherfordoides sp.; Sagrinella durrandii; Shallow-marine sediments; Sigmoilopsis sp.; Siphonaperta sp.; Sphaeroidina bulloides; Spiroloculina sp.; Spirosigmoilinella compressa; Split; Stainforthia fusiformis; Textularia foliacea; Textularia kerimbaensis; Textularia sp.; Tiphotrocha kellettae; Tosaia sp.; Triloculina sp.; Turrilina sp.; Upwelling; Uvigerina vadescens; Uvigerinella glabra; Valvulineria hamanakoensis We investigated fossil planktonic foraminifera from cores ND-02 (Nakdong River delta) and PC-11 (inner shelf off southeast Korea), to assess millennial-scale variations in the surface oceanography. In addition, we also analyzed benthic foraminiferal fauna in core PC-11. The coiling ratio of Neogloboquadrina pachyderma shows five millennial-scale near-cyclic variations (~8.7-8.3, ~7.5-6.2, ~4.7, ~2.8 and ~0.5 ka) since ~9 ka. These variations are similar to warm-water diatom variations at the Oki Ridge where a cyclicity of ~1.6 kyr is present, possibly associated with a Bond event. By contrast, the near-cyclic variations in our planktonic foraminiferal record were not fully consistent with the reported intensity variations of the Tsushima Warm Current in the East Asian margin and the warm Kuroshio Current in the Northwest Pacific. Our records from southeast Korea seem to reflect the more regional oceanographic variations in the marginal seas of East Asia. We suggest that the coastal upwelling of the subsurface cold water along the southeast coast of Korea plays an important role in generating near-cyclic variations of warm-water biota. The occurrence of the bathyal benthic foraminifera, such as Eilohedra nipponica and Psuedoparrella naraensis in core PC-11 also supports the scenario of the upwelling of subsurface water into the shallower depths at the timing of the more common sinistral specimens of N. pachyderma than the dextral specimens that implies the more intense upwelling. These variations may have a connection to the Bond event periodicity in the North Atlantic Ocean. |
| title | Occurrences of fossil benthic foraminifera in sediment core PC-11 |
| topic | AGE; Ammonia beccarii; Ammonia inflata; Ammonia japonica; Ammonia ketienziensis angluata; Amphicoryna sp.; Angulogerina ikebei; Anomalinoides sp.; Astrononion sp.; Benthic foraminifera; Bolivina cf. decussata; Bolivina decussata; Bolivina humilis; Bolivina pseudoplicata; Bolivina robusta; Bolivina sp.; Brizalina cf. striatula; Brizalina pacifica; Brizalina striatula; Buccella frigida; Bulimina marginata; Bulimina nojimaensis; Bulimina tenuata; Buliminella elegantissima; Buliminella exilis; Cancris auriculus; Cassidulina norvangi; Cassidulinoides akitaensis; Cibicides cf. lobatulus; Cibicides cf. refulgens; Cibicides lobatulus; Cibicidoides sp.; Counting >63 µm fraction; Cyclogyra planorbis; Dentalina sp.; DEPTH, sediment/rock; Discorbinella convexa; Discorbinella sp.; Discorbis sp.; East coast of Korea; Eilohedra nipponica; Elphidium advenum; Elphidium crispum; Elphidium excavaum forma clavata; Elphidium excavaum forma excavata; Elphidium jenseni; Elphidium kusiroense; Elphidium reticulosum; Elphidium somaense; Elphidium sp.; Elphidium subarcticum; Elphidium subincertum; Fissurina spp.; Foraminifera, benthic, total; Foraminifera, benthic agglutinated; Foraminifera, benthic hyaline; Fursenkoina sp.; Gaudryina sp.; Gavelinopsis sp.; Geminospira simaensis; Glabratella spp.; Globobulimina auriculata; Globocassidulina sp.; Gyroidinoides sp.; Hanzawaia nipponica; Haynesina sp.; Hoeglundina elegans; Hyalinea balthica; Hyalinea sp.; KIGAM2011-SG_PC-11; Lagenammina sp.; Lagena spp.; Lenticulina sp.; Melonis sp.; Miliolinella sp.; Neoconorbina stachi; Nodosaria sp.; Nonionella stella; Nonionellina sp.; Nonion manpukuziensis; Oolina hexagona; Oolina melo; Oridorsalis sp.; Paracassidulina neocarinata; Pararotalia nipponica; Patellina sp.; PC; Piston corer; Planocassidulina sp.; Planocassidulina yabei; Planoglabratella opercularis; Planoglabratella sp.; Planoglabratella subopercularis; Polymorphina sp.; Pseudononion japonicum; Pseudoparrella naraensis; Pseudoparrella tamana; Pseudorotalia gaimardii compressiuscula; Pullenia apertura; Pullenia sp.; Quinqueloculina akneriana; Quinqueloculina elongata; Quinqueloculina seminulum; Quinqueloculina sp.; Rectobolivina raphana; Rosalina australis; Rosalina bradyi; Rosalina sp.; Rutherfordoides sp.; Sagrinella durrandii; Shallow-marine sediments; Sigmoilopsis sp.; Siphonaperta sp.; Sphaeroidina bulloides; Spiroloculina sp.; Spirosigmoilinella compressa; Split; Stainforthia fusiformis; Textularia foliacea; Textularia kerimbaensis; Textularia sp.; Tiphotrocha kellettae; Tosaia sp.; Triloculina sp.; Turrilina sp.; Upwelling; Uvigerina vadescens; Uvigerinella glabra; Valvulineria hamanakoensis |
| url | https://doi.org/10.1594/PANGAEA.973856 |