OKA, Eitarou

Associate Professor
Atmosphere and Ocean Research Institute

Office: AORI Building-611
TEL: +81-4-7136-6042
FAX: +81-4-7136-6056

Research Field

Physical Oceanography, Ocean Observations

Current Research

Based on observations, I am investigating variability in ocean circulation on basin to meso (~100 km) scales spatially and day to interdecadal scales temporally. I analyze data from Argo (global temperature and salinity observing system with 3000 autonomous profiling floats), satellites, research vessels, as well as conduct research cruises. I am also examining the influence of ocean circulation variability on biogeochemical structure of the ocean.

Representative Publications

1. Oka, E., S. Kouketsu, D. Yanagimoto, D. Ito, Y. Kawai, S. Sugimoto, and B. Qiu, 2020: Formation of Central Mode Water based on two zonal hydrographic sections in spring 2013 and 2016. Journal of Oceanography, 76, 373-386.
2. Oka, E., K. Yamada, D. Sasano, K. Enyo, T. Nakano, and M. Ishii, 2019: Remotely forced decadal physical and biogeochemical variability of North Pacific Subtropical Mode Water over the last 40 years. Geophysical Research Letters, doi:10.1029/2018GL081330.
3. Oka, E., M. Ishii, T. Nakano, T. Suga, S. Kouketsu, M. Miyamoto, H. Nakano, B. Qiu, S. Sugimoto, and Y. Takatani, 2018: Fifty years of the 137E repeat hydrographic section in the western North Pacific Ocean. Journal of Oceanography, 74, 115-145.