A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165
Bio- and magnetostratigraphic age data and nannofossil assemblage analysis from ODP Site 1165 evidence an anomalous warming event of the surface waters in and around Prydz Bay during the Early Pleistocene, approximately 1 Ma. This results from an increase in the abundance of nannofossils at Site 116...
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2008
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| Online Access: | http://hdl.handle.net/2122/3849 http://www.sciencedirect.com/science/journal/00310182 https://doi.org/10.1016/j.palaeo.2007.08.017 |
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English |
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ANTARCTICA 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology |
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ANTARCTICA 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology Villa, G. Lupi, C. Cobianchi, M. Florindo, F. Pekar, S. F. A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| topic_facet |
ANTARCTICA 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology |
| description |
Bio- and magnetostratigraphic age data and nannofossil assemblage analysis from ODP Site 1165 evidence an anomalous warming event of the surface waters in and around Prydz Bay during the Early Pleistocene, approximately 1 Ma. This results from an increase in the abundance of nannofossils at Site 1165, that occurred at 1 Ma. Detailed high-resolution sampling permits a new bio-magnetostratigraphic interpretation for ODP Site 1165. A decrease in δ18O values at Sites 1165 and 1167 also occurs at this time, supporting the presence of warming conditions in the Prydz Bay area. A return to colder surface waters, indicated by the absence or rare occurrence of nannofossils in the upper cores from Site 1165, suggests that more stable glacial conditions existed in the Prydz Bay basin, for the last 900 ka. The biogenic carbonate sequence identified at Site 1167 is similar to the carbonate shales recovered from the Cape Roberts Project 1. Both have been dated at about 1 Ma, supporting the idea that a significant surface waters warming occurred during the Pleistocene. These data and the presence of calcareous nannofossils from locations around the Antarctic continent also suggest that the warming event was not limited to the analysed basin, but it extended around the East Antarctic continent. These new evidence call for a re-evaluation of the notion that the East Antarctic Ice-Sheet has experienced stable conditions similar to today since the late Neogene. Published 230-244 2.2. Laboratorio di paleomagnetismo JCR Journal reserved |
| author2 |
Villa, G.; Dipartimento di Scienze della Terra, Università di Parma Lupi, C.; Dipartimento di Scienze della Terra, Università di Pavia Cobianchi, M.; Dipartimento di Scienze della Terra, Università di Pavia Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Pekar, S. F.; Lamont-Doherty Earth Observatoryof ColumbiaUniversity, Palisades, NewYork Dipartimento di Scienze della Terra, Università di Parma Dipartimento di Scienze della Terra, Università di Pavia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Lamont-Doherty Earth Observatoryof ColumbiaUniversity, Palisades, NewYork |
| format |
Article in Journal/Newspaper |
| author |
Villa, G. Lupi, C. Cobianchi, M. Florindo, F. Pekar, S. F. |
| author_facet |
Villa, G. Lupi, C. Cobianchi, M. Florindo, F. Pekar, S. F. |
| author_sort |
Villa, G. |
| title |
A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| title_short |
A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| title_full |
A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| title_fullStr |
A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| title_full_unstemmed |
A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 |
| title_sort |
pleistocene warming event at 1 ma in prydz bay, east antarctica: evidence from odp site 1165 |
| publisher |
ELSEVIER |
| publishDate |
2008 |
| url |
http://hdl.handle.net/2122/3849 http://www.sciencedirect.com/science/journal/00310182 https://doi.org/10.1016/j.palaeo.2007.08.017 |
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ENVELOPE(-70.467,-70.467,-68.950,-68.950) |
| geographic |
Antarctic The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Cape Roberts |
| geographic_facet |
Antarctic The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Cape Roberts |
| genre |
Annals of Glaciology Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ice Sheet Polarforschung Prydz Bay |
| genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ice Sheet Polarforschung Prydz Bay |
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In: Cooper, A.K., O'Brien, P.E., Richter, C. (Eds.), Proc. ODP, Sci. Results, vol. 188. [Online]. Available from World Wide Web: http://www-odp.tamu.edu/ publications/188_SR/008/008.htm. Young, J.R., 1991. A Quaternary nannofossil range chart. INA Newsletter 13/1, 14–17. Zachos, J., Pagani, M., Sloan, L., Thomas, E., Billups, K., 2001. Trends, rhythms, and aberrations in global climate 65 Ma to present. Science 292, 686–693. http://hdl.handle.net/2122/3849 http://www.sciencedirect.com/science/journal/00310182 doi:10.1016/j.palaeo.2007.08.017 |
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ftingv:oai:www.earth-prints.org:2122/3849 2023-05-15T13:29:52+02:00 A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165 Villa, G. Lupi, C. Cobianchi, M. Florindo, F. Pekar, S. F. Villa, G.; Dipartimento di Scienze della Terra, Università di Parma Lupi, C.; Dipartimento di Scienze della Terra, Università di Pavia Cobianchi, M.; Dipartimento di Scienze della Terra, Università di Pavia Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Pekar, S. F.; Lamont-Doherty Earth Observatoryof ColumbiaUniversity, Palisades, NewYork Dipartimento di Scienze della Terra, Università di Parma Dipartimento di Scienze della Terra, Università di Pavia Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia Lamont-Doherty Earth Observatoryof ColumbiaUniversity, Palisades, NewYork 2008 http://hdl.handle.net/2122/3849 http://www.sciencedirect.com/science/journal/00310182 https://doi.org/10.1016/j.palaeo.2007.08.017 en eng ELSEVIER Palaeogeography, Palaeoclimatology, Palaeoecology 1-2 / 260 (2008) Ahagon, N., Tanaka, Y., Ujiie, H., 1993. Florisphaera profunda, a possible nannoplankton indicator of late Quaternary changes in sea-water turbidity at the northwestern margin of the Pacific. Marine Micropaleontology 22 (3), 255–273. Aubry, M.-P., 1995. From chronology to stratigraphy: interpreting the lower and middle Eocene stratigraphic record in the Atlantic Ocean. In: Berggren, W.A., Kent, D.V., Aubry, M.-P., Hardenbol, J. (Eds.), Geochronology, Time Scales and Global Stratigraphic Correlations: a Unified Temporal Framework for an Historical Geology. Special Volume, vol. 54. Society of Economic Geologists and Mineralogists, pp. 213–274. Aubry, M.-P., Villa, G., 1996. Calcareous nannofossil stratigraphy of the Lemme-Carrosio Paleogene/Neogene Global Stratotype Section and Point. Giornale di Geologia 581/1–2, 51–69 ser.3a. Baker, P.F., Camerlenghi, A., 2002. Synthesis of Leg 178: glacial history of the Antarctic Peninsula from Pacific margin sediments. In: Barker, P.F., Camerlenghi, A., Acton, G.D., Ramsay, A.T.S. (Eds.), Proc. ODP, Scientific Results, vol. 178, pp. 1–40. [Online]. Available from World Wide Web: http://www.odp.tamu.edu/ publications/178_SR/VOLUME/SYNTH/SYNTH.PDF. Barrett, P., 2003. Cooling a continent. Nature 421, 221–223. Bohaty, S.M., Scherer, R.P., Harwood, D.M., 1998. Quaternary Diatom Biostratigraphy and palaeoenvironments of the CRP-1 Drillcore, Ross Sea, Antarctica. Terra Antartica 5 (3), 431–453. Bonn,W.J., Fütterer, D.K., Grobe, H., 1994. Quaternary sedimentation at the Antarctic continental margin. Terra Antartica 1 (2), 319–320. Bown, P., Young, J.R., 1998. Techniques. In: Bown, P.R. (Ed.), Calcareous Nannofossil Biostratigraphy. British Micropalaeontology Society Series. Chapman & Hall, pp. 16–28. Burckle, L.H., Pokras, E.M., 1991. Implications of a Pliocene stand of Nothofagus (southern beech) within 500 kilometres of the South Pole. Antarctic Science 3 (4), 389–403. Busetti, M., Caburlotto, A., Armand, L., Damiani, D., Giorgetti, G., Lucchi, R.C., Quilty, P.G., Villa, G., 2003. Plio-Quaternary sedimentation on the Wilkes Land continental rise. Preliminary results. Deep-sea Research, Part II 50 (8–9), 1529–1562. Cape Roberts Science Team, 1998. Initial report from CRP-1, Cape Roberts Project, Antarctica. Terra Antartica 5 (1), 1–187. Cooper, A.K., O'Brien, P.E., 2004. 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Science 292, 686–693. http://hdl.handle.net/2122/3849 http://www.sciencedirect.com/science/journal/00310182 doi:10.1016/j.palaeo.2007.08.017 restricted ANTARCTICA 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology article 2008 ftingv https://doi.org/10.1016/j.palaeo.2007.08.017 2022-07-29T06:04:53Z Bio- and magnetostratigraphic age data and nannofossil assemblage analysis from ODP Site 1165 evidence an anomalous warming event of the surface waters in and around Prydz Bay during the Early Pleistocene, approximately 1 Ma. This results from an increase in the abundance of nannofossils at Site 1165, that occurred at 1 Ma. Detailed high-resolution sampling permits a new bio-magnetostratigraphic interpretation for ODP Site 1165. A decrease in δ18O values at Sites 1165 and 1167 also occurs at this time, supporting the presence of warming conditions in the Prydz Bay area. A return to colder surface waters, indicated by the absence or rare occurrence of nannofossils in the upper cores from Site 1165, suggests that more stable glacial conditions existed in the Prydz Bay basin, for the last 900 ka. The biogenic carbonate sequence identified at Site 1167 is similar to the carbonate shales recovered from the Cape Roberts Project 1. Both have been dated at about 1 Ma, supporting the idea that a significant surface waters warming occurred during the Pleistocene. These data and the presence of calcareous nannofossils from locations around the Antarctic continent also suggest that the warming event was not limited to the analysed basin, but it extended around the East Antarctic continent. These new evidence call for a re-evaluation of the notion that the East Antarctic Ice-Sheet has experienced stable conditions similar to today since the late Neogene. Published 230-244 2.2. Laboratorio di paleomagnetismo JCR Journal reserved Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ice Sheet Polarforschung Prydz Bay Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Palaeogeography, Palaeoclimatology, Palaeoecology 260 1-2 230 244 |