[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

[A-OS19] Multiscale Ocean Physical-Biogeochemical-Ecosystem Interactions: Theory, Observation, and Modeling

Wed. May 27, 2026 3:30 PM - 5:00 PM 201A (International Conference Hall, Makuhari Messe)

Chairperson:Eddebbar Yassir(Scripps Institution of Oceanography), Takano Yohei(British Antarctic Survey)

Multiscale ocean physical processes (heat, salinity, and circulation) substantially modulate ocean biogeochemistry and marine ecosystems, shaping carbon, dissolved oxygen, and nutrient distributions as well as biological productivity, community structure, and biodiversity. However, substantial uncertainties remain regarding how ocean physics and climate dynamics have evolved over the historical period and how they will respond to and feedback on a changing climate. Circulation-driven ocean heat uptake and redistribution also modulate biogeochemical processes such as stratification, carbon uptake, deoxygenation, and nutrient cycling, with cascading impacts on ecosystem functioning, trophic interactions, and the vulnerability of marine organisms to multiple stressors (i.e., warming, acidification, and deoxygenation).

Evaluating these vulnerabilities requires a holistic approach that integrates physics, biogeochemistry, and ecology, drawing on theory, observations, and modeling. Understanding the coupling between physical, biogeochemical, and ecological processes is therefore essential for predicting changes in biogeochemical cycles, ecosystem structure and function, and the services marine ecosystems provide.

This session invites comprehensive studies that examine how physical ocean systems and climate variability influence ocean biogeochemical cycles and marine ecosystems, spanning paleo, present-day, and future climates. We seek contributions that advance understanding of physical controls, interactions, and feedback. We particularly encourage submissions that leverage observational datasets, historical reconstructions, modeling and model-observation synthesis, proxy records, technological developments, and operational applications, as well as innovative approaches that foster cross-disciplinary collaboration and help communicate scientific outcomes to the broader public.

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3:30 PM - 3:45 PM

[AOS19-17] Could slowing Antarctic dense water formation increase global net primary production?

*Jan David Zika¹, Keith Bradley Rodgers² (1. University of New South Wales, Sydney, 2. Advanced Institute for Marine Ecosystem Change, Tohoku University, Sendai)

3:45 PM - 4:00 PM

[AOS19-18] Carbon-to-Chlorophyll-a Ratio Variability in a Subtropical Coastal Bay Revealed by High-Frequency Observations

*Liang-Yu Chen¹, Tzong-Yueh Chen¹ (1. IMEE, NTOU, Taiwan)

4:00 PM - 4:15 PM

[AOS19-19] Impact of Temperature-Dependent Organic Matter Decomposition on Nutrient Cycles in the North Pacific Subtropical Gyre and Its Response to Warming

*Tsubasa Naito¹, Hidetaka Kobayashi², Amaya Yusuke¹, JING ZHANG² (1. University of Toyama, 2. Faculty of Science, Academic Assembly)

4:15 PM - 4:30 PM

[AOS19-20] Combining observations and modeling to understand the adaptive capacity of phytoplankton in the oligotrophic ocean

Fernanda Henderikx-Freitas¹, Bob Lansdorp², Angelicque White¹, Qian Li¹, Ger van den Engh³, *S. Lan Smith⁴, Ettore Barbieri⁴, Bingzhang Chen⁵, Kai Wirtz⁶ (1. Department of Oceanography, University of Hawai'i, USA, 2. Hawai'i Natural Energy Institute, University of Hawai'i, USA, 3. Marine Cytometry Inc., USA, 4. Advanced Institute for Marine Ecosystem Change [WPI-AIMEC], JAMSTEC, Yokohama, Japan, 5. University of Strathclyde, Glasgow, UK, 6. Hereon, Geesthacht, Germany)

4:30 PM - 4:45 PM

[AOS19-21] Ecosystem Model Parameters Setup and Sensitivity Analysis

*Valentina Pintos Andreoli¹, Hirotada Moki¹, Kenta Watanabe¹, Yutaro Koga^2,3, Tomohiro Kuwae¹ (1. Port and Airport Research Institute , 2. Hyogo Prefectural Institute of Environmental Sciences , 3. Osaka University)

4:45 PM - 5:00 PM

[AOS19-22] The High Value of Climate Mitigation in Limiting Global Fish Biomass Losses to the year 2300

*Keith Bradley Rodgers¹, Daniele Bianchi², Olivier Aumont³, Julia Blanchard⁴, Laurent Bopp⁵, Matthias Büchner⁶, William Cheung⁷, Jason Everett⁸, Vianney Guibourd de Luzinais^10,9, Jerome Guiet², Ryan Heneghan¹¹, Simeon Hill¹², Michio Kawamiya¹³, zhen lin¹, Kieran Murphy^4,8, Juliano Palacios⁷, Colleen Petrik¹⁴, Anthony Richardson⁸, Ryohei Yamaguchi¹⁵, Andrew Yool¹⁶ (1. AIMEC-Tohoku University, Japan, 2. University of California, Los Angeles, US, 3. LOCEAN, France, 4. University of Tasmania, Australia, 5. LMD/IPSL/ENS, France, 6. Potsdam Institute for Climate Impact Research (PIK), Germany, 7. Institute for the Oceans and Fisheries, U.B.C., Canada, 8. University of Queensland, Australia, 9. L'Institut Agro Rennes-Angers, France, 10. Swedish University of Agricultural Sciences, Uppsala, Sweden, 11. Griffith University, Australia, 12. British Antarctic Survey, NERC, UK, 13. AIMEC-JAMSTEC, Japan, 14. University of California, San Diego, US, 15. JAMSTEC, Japan, 16. National Oceanographic Centre, Southampton, UK)

Session information