[EE] Oral

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

[A-OS14] [EE] Marine ecosystems and biogeochemical cycles: theory, observation and modeling

Sun. May 21, 2017 10:45 AM - 12:15 PM 303 (International Conference Hall 3F)

convener:Takafumi Hirata(Faculty of Environmental Earth Science, 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), Chairperson:Taka Hirata(Faculty of Environmental Earth Science, Hokkaido University), Chairperson:Shin-Ichi Ito(The University of Tokyo)

The ocean accounts for about 50% of the global net primary production on our planet. 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 mechanism(s) 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. This session aims to provide a venue for discussing recent achievements in marine biogeochemical and ecosystem studies that will lead to better understanding of the Earth system.

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10:45 AM - 11:00 AM

[AOS14-01] Mapping of monthly climatology of global ocean surface nutrient by a feed forward neural network

*Yukihiro Nojiri^1,3, Chika Kusakabe¹, Yoko Ohaga², Chisato Wada³, Jiye Zeng³, Shin-ichiro Nakaoka³, Sayaka Yasunaka⁴ (1.Hirosaki University, 2.Tohoku University, 3.National Institute for Environmental Studies, 4.JAMSTEC)

11:00 AM - 11:15 AM

[AOS14-02] Development of a model of nitrous oxide in the western North Pacific

*Chisato Yoshikawa¹, Yoshikazu Sasai¹, Akiko Makabe¹, Florian Breider³, Sakae Toyoda², Yohei Matsui¹, Shinsuke Kawagucci¹, Masahide Wakita¹, Tetsuichi Fujiki¹, Naomi Harada¹, Naohiro Yoshida² (1.Japan Agency for Marine-Earth Science and Technology, 2.Tokyo Institute of Technology, 3.Ecole Polytechnique Fédérale de Lausanne)

11:15 AM - 11:30 AM

[AOS14-03] Cluster III nifH-harboring microbes dominated diazotroph communities in the Chukchi Sea (western Arctic Ocean)

*Takuhei Shiozaki¹, Amane Fujiwara¹, Minoru Ijichi², Naomi Harada¹, Shigeto Nishino¹, Toshi Nagata², Koji Hamasaki² (1.Japan Agency for Marine-Earth Science and Tecnology, 2.The University of Tokyo, Atmosphere and Ocean Research Institute)

11:30 AM - 11:45 AM

[AOS14-04] Surface peaks of primary production during summer in the oligotrophic open ocean: a modeling study

*Bingzhang Chen¹, Sherwood Lan Smith¹ (1.Japan Agency for Marine-Earth Science and Technology)

11:45 AM - 12:00 PM

[AOS14-05] Microscale spatial variability of plankton and new closure ecosystem models coupled with a 1D physical model

*Hikaru Homma¹, Matthew Griffiths², Anupam Priyadarshi³, Hidekatsu Yamazaki¹ (1.Tokyo University of Marine Science and Technology, 2.University of Victoria, 3.Institute of Science, Banaras Hindu University)

Discussion (12:00 PM - 12:15 PM)

Session information