Articles | Volume 21, issue 1
https://doi.org/10.5194/os-21-419-2025
https://doi.org/10.5194/os-21-419-2025
Research article
 | 
12 Feb 2025
Research article |  | 12 Feb 2025

Hydrographic section along 55° E in the Indian and Southern oceans

Katsuro Katsumata, Shigeru Aoki, Kay I. Ohshima, and Michiyo Yamamoto-Kawai

Related authors

The OCEAN ICE mooring compilation: a standardised, pan-Antarctic database of ocean hydrography and current time series
Shenjie Zhou, Pierre Dutrieux, Claudia F. Giulivi, Adrian Jenkins, Alessandro Silvano, Christopher Auckland, E. Povl Abrahamsen, Michael P. Meredith, Irena Vaňková, Keith W. Nicholls, Peter E. D. Davis, Svein Østerhus, Arnold L. Gordon, Christopher J. Zappa, Tiago S. Dotto, Theodore A. Scambos, Kathyrn L. Gunn, Stephen R. Rintoul, Shigeru Aoki, Craig Stevens, Chengyan Liu, Sukyoung Yun, Tae-Wan Kim, Won Sang Lee, Markus Janout, Tore Hattermann, Julius Lauber, Elin Darelius, Anna Wåhlin, Leo Middleton, Pasquale Castagno, Giorgio Budillon, Karen J. Heywood, Jennifer Graham, Stephen Dye, Daisuke Hirano, and Una Kim Miller
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2025-54,https://doi.org/10.5194/essd-2025-54, 2025
Preprint under review for ESSD
Short summary
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast
Mutsumi Iizuka, Takuya Itaki, Osamu Seki, Ryosuke Makabe, Motoha Ojima, and Shigeru Aoki
J. Micropalaeontol., 43, 37–53, https://doi.org/10.5194/jm-43-37-2024,https://doi.org/10.5194/jm-43-37-2024, 2024
Short summary
Modeling seasonal-to-decadal ocean–cryosphere interactions along the Sabrina Coast, East Antarctica
Kazuya Kusahara, Daisuke Hirano, Masakazu Fujii, Alexander D. Fraser, Takeshi Tamura, Kohei Mizobata, Guy D. Williams, and Shigeru Aoki
The Cryosphere, 18, 43–73, https://doi.org/10.5194/tc-18-43-2024,https://doi.org/10.5194/tc-18-43-2024, 2024
Short summary
Estimation of ice melt, freshwater budget, and their multi-decadal trends in the Baffin Bay and Labrador Sea
Vigan Mensah, Koji Fujita, Stephen Howell, Miho Ikeda, Mizuki Komatsu, and Kay I. Ohshima
EGUsphere, https://doi.org/10.5194/egusphere-2023-2492,https://doi.org/10.5194/egusphere-2023-2492, 2023
Preprint archived
Short summary
Eighteen-year record of circum-Antarctic landfast-sea-ice distribution allows detailed baseline characterisation and reveals trends and variability
Alexander D. Fraser, Robert A. Massom, Mark S. Handcock, Phillip Reid, Kay I. Ohshima, Marilyn N. Raphael, Jessica Cartwright, Andrew R. Klekociuk, Zhaohui Wang, and Richard Porter-Smith
The Cryosphere, 15, 5061–5077, https://doi.org/10.5194/tc-15-5061-2021,https://doi.org/10.5194/tc-15-5061-2021, 2021
Short summary

Related subject area

Approach: In situ Observations | Properties and processes: Overturning circulation, gyres and water masses
Seasonality of meridional overturning in the subpolar North Atlantic: implications for relying on the streamfunction maximum as a metric of AMOC slowdown
Alan D. Fox, Neil J. Fraser, and Stuart A. Cunningham
EGUsphere, https://doi.org/10.5194/egusphere-2025-616,https://doi.org/10.5194/egusphere-2025-616, 2025
Short summary
On Mode Water formation and erosion in the Arabian Sea: Forcing mechanisms, regionality, and seasonality
Estel Font, Sebastiaan Swart, Puthenveettil Narayana Vinayachandran, and Bastien Y. Queste
EGUsphere, https://doi.org/10.5194/egusphere-2025-468,https://doi.org/10.5194/egusphere-2025-468, 2025
Short summary
Circulation of Baffin Bay and Hudson Bay waters on the Labrador shelf and into the subpolar North Atlantic
Elodie Duyck, Nicholas P. Foukal, and Eleanor Frajka-Williams
Ocean Sci., 21, 241–260, https://doi.org/10.5194/os-21-241-2025,https://doi.org/10.5194/os-21-241-2025, 2025
Short summary
Mechanisms of the Overturning Circulation in the Northern Red Sea, more than Convective Mixing
Lina Eyouni, Zoi Kokkini, Nikolaos D. Zarokanellos, and Burton H. Jones
EGUsphere, https://doi.org/10.5194/egusphere-2024-3319,https://doi.org/10.5194/egusphere-2024-3319, 2024
Short summary
Continued warming of deep waters in the Fram Strait
Salar Karam, Céline Heuzé, Mario Hoppmann, and Laura de Steur
Ocean Sci., 20, 917–930, https://doi.org/10.5194/os-20-917-2024,https://doi.org/10.5194/os-20-917-2024, 2024
Short summary

Cited articles

Aoki, S., Bindoff, N. L., and Church, J. A.: Interdecadal water mass changes in the Southern Ocean between 30°E and 160°E, Geophys. Res. Lett., 32, L07607, https://doi.org/10.1029/2004GL022220, 2005. a, b
Aoki, S., Katsumata, K., Hamaguchi, M., Noda, A., Kitade, Y., Shimada, K., Hirano, D., Simizu, D., Aoyama, Y., Doi, K., and Nogi, Y.: Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica, J. Geophys. Res.-Oceans, 125, e2020JC016374, https://doi.org/10.1029/2020JC016374, 2020a. a, b
Aoki, S., Yamazaki, K., Hirano, D., Katsumata, K., Shimada, K., Kitade, Y., Sasaki, H., and Murase, H.: Reversal of freshening trend of Antarctic Bottom Water in the Australian-Antarctic Basin during 2010s, Sci. Rep., 10, 14415, https://doi.org/10.1038/s41598-020-71290-6, 2020b. a
Bryden, H. L., McDonagh, E. L., and King, B. A.: Changes in Ocean Water Mass Properties: Oscillations or Trends?, Science, 300, 2086–2088, https://doi.org/10.1126/science.1083980, 2003. a, b
Bullister, J. L. and Warner, M. J.: Atmospheric Histories (1765–2022) for CFC-11, CFC-12, CFC-113, CCl4, SF6 and N2O (NCEI Accession 0164584), NOAA National Centers for Environmental Information, https://doi.org/10.3334/cdiac/otg.cfc_atm_hist_2015, 2017. a
Download
Short summary
Ship-based observations provide data of seawater properties like temperature, salinity, nutrients, and various gases, but some important world oceans have still not been covered. A voyage in 2019/20 in the southwest Indian Ocean along approximately 55° E from 30° S to Antarctica attempted to fill one such data-sparse region. The measured cross section of the Antarctic Circumpolar Current and accompanying eddies demonstrates various oceanic behaviours including fronts and eddy mixing.
Share