Session information

[E] Oral

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

[A-OS13] Marine ecosystems and biogeochemical cycles: theory, observation and modeling

Sat. Jun 5, 2021 10:45 AM - 12:15 PM Ch.11 (Zoom Room 11)

convener:Takafumi Hirata(Arctic Research Center, Hokkaido University), Shin-ichi Ito(Atmosphere and Ocean Research Institute, The University of Tokyo), E Eileen Hofmann(Old Dominion University), N Enrique Curchitser(Rutgers University New Brunswick), Chairperson:Takafumi Hirata(Arctic Research Center, Hokkaido University), Shin-ichi Ito(Atmosphere and Ocean Research Institute, The University of Tokyo), Eileen E Hofmann(Old Dominion University), Enrique N Curchitser(Rutgers University New Brunswick)

The ocean accounts for about 50% of global net primary production. This production is significant for carbon cycling and ecosystem functioning, and is related directly or indirectly to a variety of climatic and ecological phenomena. The responses to natural and anthropogenic environmental stressors that influence marine production and diversity can cause perturbations to marine ecosystems that alter trophic dependencies and interactions among organisms at a range of space and time scales. Quantification of the principal mechanisms driving spatio-temporal variability of marine ecosystem remains to be done, especially in terms of evaluation of uncertainty in responses. As a result, evaluating vulnerability of marine ecosystems to environmental change requires systematic and holistic approaches that integrate physics to ecology and are based in observations and modelling. In addition, expectations to deliver these science to public society is raising. This session aims to provide a venue for not only discussing recent advances in understanding marine biogeochemical cycles, ecosystems and their interactions, but also networking with a variety of people to seed new ideas in marine ecological research. Observational, modeling and conceptual studies, including technological development and operational applications, that consider linkages among biogeochemical and ecosystem processes, biodiversity, and the effects of multiple stressors from molecular to planetary scales are encouraged.

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10:45 AM - 11:00 AM

[AOS13-07] Influence of ENSO on surface chlorophyll-a in the Gulf of Thailand

*Dudsadee Leenawarat¹, Jutarak Luang-on¹, Anukul Buranapratheprat², Joji Ishizaka³ (1.Graduate School of Environmental Studies, Nagoya University, 2.Department of Aquatic Science, Faculty of Science, Burapha University, Thailand, 3.Institute for Space-Earth Environmental Research, Nagoya University, Japan)

11:00 AM - 11:15 AM

[AOS13-08] Nitrogen isotope mapping in the North Pacific using a marine nitrogen isotope model

*Chisato Yoshikawa¹, Masahito Shigemitsu¹, Akitomo Yamamoto¹, Akira Oka², Naohiko Ohkouchi¹ (1.JAMSTEC, 2.AORI)

11:15 AM - 11:30 AM

[AOS13-09] Interannual variations of the lower-trophic level ecosystem in the Harima-Nada, eastern Seto Inland Sea, Japan simulated by a plankton functional type model.

*Naoki Yoshie¹, Ayaka Hiramine¹ (1.Center for Marine Environmental Studies, Ehime University)

11:30 AM - 11:45 AM

[AOS13-10] Occurrence of phytoplankton bloom as the Kuroshio passes an island

*JIE GAO¹, Xinyu Guo¹ (1.Center for Marine Environmental Studies, Ehime University)

11:45 AM - 12:00 PM

[AOS13-11] Long-term comparison between the Japanese sardine stock level and simulated zooplankton density around the Kuroshio axis

*Haruka Nishikawa¹, Hiroyuki Tsujino², Shiro Nishikawa¹, Hideyuki Nakano², Toru Sugiyama¹, Yoichi Ishikawa¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Meteorological Research Institute)

12:00 PM - 12:15 PM

[AOS13-12] Changes in phytoplankton photophysiology during pre-bloom and bloom phases in the coastal Oyashio waters

*Tomonori Isada¹, Toru Hirawake², Koji Suzuki³, Jun Nishioka⁴, Hiromi Kasai⁵ (1.Field Science Center for Northern Biosphere, Hokkaido University, 2.Faculty of Fisheries Sciences, Hokkaido University, 3.Faculty of Environmental Earth Science, Hokkaido University, 4.Institute of Low Temperature Science, Hokkaido University, 5.Japan fisheries research and education agency)