Articles | Volume 23, issue 20
https://doi.org/10.5194/bg-23-7505-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-7505-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Oct 2026
Research article |
| 26 Oct 2026
| 26 Oct 2026
Biogeochemical controls on the concentrations and stable isotope compositions of sea-ice particulate organic matters in the Southern Ocean
Keigo D. Takahashi
CORRESPONDING AUTHOR
Faculty of Fisheries Sciences, Hokkaido University, Hakodate, 041-8611, Japan
Japan Society for the Promotion of Science, Chiyoda, 102-0083, Japan
Escuela de Ciencias del Mar, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile
Ryosuke Makabe
National Institute of Polar Research, Tachikawa, 190-8518, Japan
The Graduate University for Advanced Studies, SOKENDAI, Tachikawa, 190-8518, Japan
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Masayoshi Sano
National Institute of Polar Research, Tachikawa, 190-8518, Japan
Kazuki Nakata
Earth Observation Research Center, Japan Aerospace Exploration Agency, Tsukuba, 305-0047, Japan
Noriaki Kimura
Faculty of Education, Kochi University, Kochi, 780-8520, Japan
Daiki Nomura
Faculty of Fisheries Sciences, Hokkaido University, Hakodate, 041-8611, Japan
Arctic Research Center, Hokkaido University, Sapporo, 001-0021, Japan
Michiyo Yamamoto-Kawai
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Ryo Matsuda
Faculty of Science and Engineering, Soka University, Hachioji, 192-8577, Japan
Natsumi Nojiro
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Masato Ito
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, 277-8561, Japan
Shintaro Takao
National Institute for Environmental Studies, Tsukuba, 305-8506, Japan
Naho Horimoto-Miyazaki
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Aiko Tachibana
Japan Fisheries Research and Education Agency, Yokohama, 236-8648, Japan
Norio Kurosawa
Faculty of Science and Engineering, Soka University, Hachioji, 192-8577, Japan
Takeshi Tamura
National Institute of Polar Research, Tachikawa, 190-8518, Japan
The Graduate University for Advanced Studies, SOKENDAI, Tachikawa, 190-8518, Japan
Mizuki Komatsu
Japan Agency for Marine-Earth Science and Technology, Yokohama, 236-0001, Japan
Kay I. Ohshima
Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan
Kohei Mizobata
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Shigeru Aoki
Institute of Low Temperature Science, Hokkaido University, Sapporo, 060-0819, Japan
Masato Moteki
National Institute of Polar Research, Tachikawa, 190-8518, Japan
Tokyo University of Marine Science and Technology, Minato, 108-8477, Japan
Data sets
Particulate organic carbon and nitrogen concentrations and other biogeochemical data of brash sea ice and seawater collected in the Indian Sector of the Southern Ocean in the expeditions during 2016 and 2020 summer K. D. Takahashi et al. https://doi.org/10.17592/001.2026050701
Daily Polar Gridded Sea Ice Velocity N. Kimura and T. Sugimura https://doi.org/10.17592/001.2025112601
Short summary
We collected sea ice and identified factors affecting the particulate organic carbon and nitrogen content and stable isotope ratios. The results suggested nutrient and organic matter influenced the isotope compositions in sea ice. Using the hydrography and sea-ice data, we estimated the particulate organic carbon supply from sea ice. This supply was equivalent to 14.7 % of phytoplankton production near ice edge, highlighting the importance of sea-ice derived materials for Antarctic ecosystems.
We collected sea ice and identified factors affecting the particulate organic carbon and...
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