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Overview -JKEO Buoy- Phase 1: On February 18, 2007, at 37- 55.33N, 146- 34.64E (nominal 38.0N, 146.5E, named as "JAMSTEC Kuroshio Extension Observatory, JKEO" site) in the north of Kuroshio Extension region, IORGC/JAMSTEC deployed a surface buoy (JKEO1) under the collaboration in research with PMEL/NOAA. This JKEO1 buoy is based on KEO buoy of NOAA/PMEL and carries same sensors as KEO to monitor heat, moisture and momentum fluxes, and upper ocean temperature and salinity. Those flux and ocean observation data from JKEO1 are publicly available in this web site, and are being utilized for better understanding of air-sea interaction in the western North Pacific, and validation of satellite data. Both KEO and JKEO are part of the global network of OceanSITES time series reference sites. |
 Locations of JKEO and KEO buoys. Black contour and color mean SST (deg. C). White contour means turbulent heat flux (W/m**2). The SST and the turbulent heat flux data are derived from COADS wintertime climatology during 1960-1997. |
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PMEL/NOAA has set a CO2 measurement system on JKEO buoy under the collaboration in research with Mutsu Institute for Oceanography (MIO) of JAMSTEC. JKEO CO2 data and metadata are available through the PMEL CO2time series web pages.
JKEO1 buoy was recovered on March 24, 2008, by R/V Mirai. The data retrieved are publicly available in the data page of this web site in ascii format and OceanSITES NetCDF format. Phase 2: On February 29, 2008, IORGC/JAMSTEC deployed another surface buoy named as JKEO2 at JKEO site (38-04.82' N, 146-25.21' E). JKEO2 buoy is a newly designed one named as K-TRITON which is based on m-TRITON buoy developed by MARITEC/JAMSTEC. MIO of JAMSTEC had set a CO2 measurement system on JKEO2 buoy. On May 28, JKEO2 stopped transmission of observational data due to loss of ARGOS antenna, and was recovered on September 5, 2008 during the R/V Kaiyo KY08-09 cruise. The data retrieved are publicly available in the data page of this web site. Phase 3: On November 12, 2008, IORGC/JAMSTEC deployed the third surface buoy JKEO3 at JKEO site (38-04.71' N, 146-25.14' E) during the R/V Mirai MR08-E02 emergency cruise. The design of JKEO3 buoy is a little modified from JKEO2 buoy for avoiding damages by fishing activity. Trouble in data transmission system was found in the early morning of November 13, and its top buoy was put on deck and re-deployed on November 15 after repair of the data transmission system. The near-real-time data transmitted from JKEO3 is made publicly available at the data page in this web site. JKEO is operated by Kuroshio Transport and Surface Flux Group, Ocean General Circulation Observational Research Program, IORGC/JMASTEC Contact: Group Leader: Dr. Hiroshi Ichikawa, Phone:+81-46-867-9832, Fax:+81-46-867-9455 Reference Cronin, M. F., C. Meinig, C. L. Sabine, H. Ichikawa, and H. Tomita: Surface Mooring Network in the Kuroshio Extension. IEEE Systems Journal, Vol.2, No.3, 424-430,doi:10.1109/JSYST.2008.925982, (Published on September 17, 2008). Last update on February 19, 2009. |
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