[E] Oral

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

[A-OS24] Exploring new frontiers of oceanic mixing research in the next decade

convener:Toshiyuki Hibiya(Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo), Ichiro Yasuda(Atmosphere and Ocean Research Institute, The University of Tokyo), Lakshmi Kantha(Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado, USA)

Mixing plays many important roles in the global ocean through a variety of different processes. In the upper ocean, mixing affects the sea surface temperature and hence air-sea interactions, which in turn influence the state of the atmosphere on a variety of time scales. Mixing in the deep ocean maintains the abyssal stratification of the world's oceans and influences the global overturning circulation, which in turn affects long-term climate. Ocean mixing modulates the transport and dispersal of dissolved and suspended materials, including pollutants, plankton and fish larvae. It also plays an important role in the oceanic food chain in so far as primary productivity, which occurs predominantly in the euphotic zone, is affected by nutrient uptake from the deep associated with ocean mixing.

Microstructure profilers are being increasingly and routinely used to measure turbulence in the oceans, including the deep. Mixing models with more inclusive physics are being developed. Increasing computer power is making it possible to include sophisticated mixing models in global circulation models. As such, it is time to take stock of where we stand at present and explore the frontiers of mixing research over the next decade to advance our knowledge and utilize it for societal benefit.

This session encompasses a wide variety of aspects of mixing within the water column from the surface to the seabed, as well as the impact of mixing on key physical, biological, and chemical processes, such as those mentioned above, with special attention to new findings obtained through improvements in oceanographic instrumentation, mixing models and the use of supercomputers. Observational, theoretical, experimental, and numerical approaches are all welcome. In this session, we particularly encourage discussion that can confirm how far our understanding of related topics has advanced and help define the new frontiers of ocean mixing research to be tackled in the next decade.

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[AOS24-19] Effects of nutrient supply with strong turbulent mixing on lower-trophic level ecosystem around the Tokara strait

*Naoki Yoshie¹, Kazuki Ohgi¹, Anri Kabe¹, Yuma Hayashi¹, Toru Kobari², Eisuke Tsutsumi³, Daisuke Hasegawa⁴, Joji Ishizaka⁵ (1.Center for Marine Environmental Studies, Ehime University, 2.Faculty of Fisheries, Kagoshima University, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.Tohoku National Fisheries Research Institute, Japan Fisheries Research and Education Agency, 5.Institute for Space-Earth Environmental Research Nagoya University)

[AOS24-20] Observation of anticyclonic eddies in the western subarctic North Pacific

*Ueno Hiromichi¹, Ryo Dobashi², Yuki Okada², Takahiro Tanaka³, Jun Nishioka⁴, Toru Hirawake¹, Atsushi Ooki¹, Sachihiko Itoh⁵, Yoshikazu Sasai⁶, Hideharu Sasaki⁶, Ichiro Yasuda⁵ (1.Faculty of Fisheries Sciences, Hokkaido University, 2.Graduate School of Fisheries Sciences, Hokkaido University, 3.Tohoku National Fisheries Research Institute, Japan Fisheries Researh and Education Agency, 4.Institute of Low Temperature Science, Hokkaido University, 5.Atmosphere and Ocean Research Institute, The University of Tokyo, 6.Japan Agency for Marine-Earth Science and Technology)

[AOS24-21] Importance of the intermediate water nutrient pool and mixing around island chains for constructing HNLC region in the subarctic Pacific

*Jun Nishioka^1,2, Hajime Obata³, Toru Hirawake^2,4, Youhei Yamashita⁵, Hiroshi Ogawa³, Ichiro Yasuda³ (1.Institute of low temperature sciences, Hokkaido University, 2.Arctic Research Center, Hokkaido University, 3.Atmosphere and Ocean Research Institute, The University of Tokyo, 4.Faculty of Fisheries Sciences, Hokkaido University, 5.Faculty of Environmental Earth Science, Hokkaido University)

[AOS24-22] Decadal variation of biological settling particle fluxes controlled by physical process in the subarctic western North Pacific.

*Naomi Harada¹, Makio Honda¹, Maki Noguchi Aita¹, Miyako Sato¹, Fujiki Tetsuichi¹, Minoru Kitamura¹, Ueno Hiromichi² (1.Japan Agency for Marine-Earth Science and Technology, 2.Hokkaido University)

[AOS24-23] Geographical distributions of primary production phenology and nutrient/iron supply in the subarctic North Pacific Ocean

*Toru Hirawake¹, Jun Nishioka², Hajime Obata³ (1.Faculty of Fisheries Sciences, Hokkaido University, 2.Institute of low temperature sciences, Hokkaido University, 3.Marine inorganic chemistry division, Atmosphere and Ocean Research Institute, University of Tokyo)

Cancelled

[AOS24-24] Eukaryotic phytoplankton contributing to a seasonal bloom and carbon export revealed by tracking sequence variants

*Takuhei Shiozaki^1,2, Yuu Hirose³, Koji Hamasaki¹, Ryo Kaneko⁴, Kazuo Ishikawa¹, Naomi Harada² (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Japan Agency for Marine-Earth Science and Technology, 3.Toyohashi University of Technology, 4.National Institute of Polar Research)