Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

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

[A-OS14] Coastal physical processes associated with mixing, eddies, internal waves

Wed. May 29, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Eiji Masunaga(Ibaraki University), Taira Nagai(Graduate School of Science, The University of Tokyo), TSUTSUMI EISUKE(Atmosphere and Ocean Research Institute, The University of Tokyo)

[AOS14-P01] Development of methods and systems for vertical mixing and observations (OMIX-A01-1)

*Ichiro Yasuda1, Koenjong Lee1, Shinzo Fujio1, Daigo Yanagimoto1, Maki Nagasawa1, Yusuke Kawaguchi1, Eitarou Oka1, Shuo Zhai1, Shino Kimura1, Ryuichiro Inoue2, Daisuke Hasegawa3, Takahiro Tanaka3, Masao Ishii4, Toshiya Nakano4, Yasutaka Goto4 (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Japan Agency of Marine-Earth Science and Technology, 3.Fisheries Research Agency, 4.Japan Meteorological Agency)

Keywords:Turbulence, Ocean Mixing, Observation system

In order to know the distribution of vertical mixing and generating mechanisms in the western North Pacific and to elucidate the influence on ocean circulations, this team developed/introduced/made practical following three observational systems that are capable to concurrently observe turbulence with vertical mm-scales and currents with 10m-scale which can be resolved by numerical models, and perform in-situ observations. 1) Developed turbulence estimate method with fast response thermistors attached to CTD platform, and obtained numerous microstructure data down to deep/intermediate depths or bottom by use of Japan Meteorological Agency, JAMSTEC and fisheries-related CTD observational array. 2) Developed autonomous observation system of underwater gliders with turbulence sensors and ADCP. 3) Developed long-term time series observation system with autonomous floats or moorings with turbulence sensors or current sensors. These new observing systems were or being tested in the real oceans. This team conducted cruises of R/V Hakuho-maru KH-16-3, KH-16-7, KH-17-5 and R/V Shinsei-maru KS-15-5, KS-16-10, KS-19-6, and microstructure and mooring observations in the Multanovskiiy 2018 cruise. This poster presentation reports this team activity and some results.