Abstract
Training research vessel Umitaka-Maru belonging to the Tokyo University of Marine Science and Technology has implemented the research cruises in the Southern Ocean, counting the 19th times in the 2015 cruise. Particularly in recent years, Umitaka-Maru has greatly contributed to various findings in oceanography in the Antarctic Ocean, such as clarification of the bottom water formation and monitoring in Lutzow Holm Bay, cooperating with the Japanese Antarctic Research Expedition. This article reviews such scientific progresses implemented by Umitaka-Maru, and further describes the recent trend of Antarctic Bottom Water from the newly obtained data. Most important findings by Umitaka-Maru are the discovery of the Antarctic bottom water (AABW) formation off the Cape Darnley with a high sea ice production polynya and the subsequent discovery of AABW formation off the Vincennes Bay with a medium sized polynya. The base oceanographic observation for physical and chemical properties has been carried out continuously along 110°E line in Australian Antarctic Basin, providing the monitoring of water mass transformation. Freshening of AABW in Australia–Antarctica Basin has been caught in a series of the observation in recent years, it is suggested that the AABW originating from the Vincennes Bay Polynya gives significant effects on the AABW in the basin. To grasp an effect of freshening of AABW on the global ocean circulation, intense hydrographic observations and deployment of a huge mooring system are now in consideration.
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References
Aoki S, Kitade Y, Shimada K, Ohshima KI, Tamura T, Bajish CC, Moteki M, Rintoul SR (2013) Widespread freshening in the seasonal ice zone near 140°E off the Adelie land coast, Antarctica, from 1994 to 2012. J Geophys Res Ocean 118:1–18. https://doi.org/10.1002/2013jc009009
Foster TD, Carmack EC (1976) Frontal zonemixing and Antarctic Bottom Water formation in the southern Weddell Sea. Deep-Sea Res 23:301–317
Garabato NAC, McDonagh EL, Stevens DP, Heywood KJ, Sanders RJ (2002) On the export of Antarctic Bottom Water from the Weddell Sea. Deep-Sea Res II 49:4715_4742
Gill AE (1973) Circulation and bottom water production in the Weddell Sea. Deep-Sea Res 20:111–140
Jacobs SS (2004) Bottom water production and its links with the thermohaline circulation. Antarct Sci 16:427–437
Jacobs SS, Amos AF, Bruchausen PM (1970) Ross sea oceanography and Antarctic Bottom Water formation. Deep-Sea Res 17:935–962
Kitade Y, Shimada K, Tamura T, Williams GD, Aoki S, Fukamachi Y, Roquet F, Hindell M, Shio S, Ohshima KI (2014) Antarctic Bottom Water production from the Vincennes Bay Polynya, East Antarctica. Geophys Res Lett 41:3528–3534. https://doi.org/10.1002/2014gl059971
Meredith MP, Watson AJ, van Scoy KA, Haine TWN (2001) Chlorofluorocarbon-derived formation rates of the deep and bottom waters of the Weddell Sea. J Geophys Res 106:28992919
Ohshima KI, Fukamachi Y, Williams GD, Nihashi S, Roquet F, Kitade Y, Tamura T, Hirano D, Herraiz-Borreguero L, Field I, Hindell M, Aoki S. Wakatsuchi M (2013) Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya. Nat Geosci. https://doi.org/10.1038/ngeo1738
Orsi AH, Johnson GC, Bullister JL (1999) Circulation, mixing, and production of Antarctic Bottom Water. Prog Oceanogr 43:55–109
Rintoul SR (1998) On the origin and influence of Adélie land bottom water, ocean, ice and atmosphere: interactions at Antarctic continental margin. Antarct Res Ser 75:151–171
Shimada K, Aoki S, Ohshima KI, Rintoul SR (2012) Influence of Ross Sea Bottom Water changes on the warming and freshening of the Antarctic Bottom Water in the Australian-Antarctic Basin. Ocean Sci 8:419–432
Tamura T, Ohshima KI, Nihashi S (2008) Mapping of sea-ice production for Antarctic coastal polynyas. Geophys Res Lett 35:L07606
van Wijk EM, Rintoul SR (2014) Freshening drives contraction of Antarctic Bottom Water in the Australian Antarctic Basin. Geophys Res Lett 41:1657–1664. https://doi.org/10.1002/2013gl058921
Acknowledgements
We are deeply indebted to the former captains, officers and crew of Umitaka-Maru that has been helped to continue observation in the Antarctic Ocean. We would like to give special thanks to Caps. Kurita, Kitazawa, Noda, and crews who have been involved in the present study. In addition, we would like to thank everyone of the science party, including Drs. Yamaguchi, Ishimaru and Moteki who served as a senior researcher in the Antarctic Ocean observation voyage. This work was supported by JSPS KAKENHI grants 23310003 and 15H01726, MEXT for physical and chemical oceanographic observations under Japanese Antarctic Research Expedition.
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Kitade, Y., Shimada, K., Aoki, S., Ohshima, K.I. (2019). Recent Research Results and Future Project in the Antarctic Ocean by Umitaka-Maru Research Group for Physical Oceanography. In: Komatsu, T., Ceccaldi, HJ., Yoshida, J., Prouzet, P., Henocque, Y. (eds) Oceanography Challenges to Future Earth. Springer, Cham. https://doi.org/10.1007/978-3-030-00138-4_10
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DOI: https://doi.org/10.1007/978-3-030-00138-4_10
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