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The
JAMSTEC encourages wide use of the following JKEO4 data and welcomes collaborations.
If you use
these data in publications or presentations, please acknowledge the
RIGC/JAMSTEC. Also, we would appreciate receiving one copy of preprint
and/or reprint of publications utilizing the data for inclusion in our
bibliography. Relevant publications should be sent to:
Ocean-Atmosphere
Interaction Research Team,
Ocean
Climate Change Research Program,
Research
Institute for Global Change,
Japan Agency for Marine-Earth Science and
Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka-city,
Kanagawa, 237-0061, Japan
Contact: Dr.
Hiroshi Ichikawa,
Phone:+81-46-867-9832,
Fax:+81-46-867-9835
Note for Phase 4:
On August 29, 2009, JAMSTEC deployed the
fourth surface buoy JKEO4 at JKEO site (38-04.71' N, 146-25.76' E) during
the R/V Kaiyo KY09-07 cruise. The design of JKEO4 buoy is a little modified
from JKEO3 buoy with adding weather sensor and GPS wave-height meter. MIO of JAMSTEC had set a CO2
measurement system on JKEO4 buoy. The daily average and hourly
meteorological and oceanic data transmitted from JKEO4 buoy system are
publicly available in this web page. Spot values of buoy location fixed
opportunistically by ARGOS and the noon positions derived from them are
also available in this web page. The
meteorological data has been provided to institutions for weather forecast
and re-analysis numerical model calculation through GTS since August 31,
2009 (WMO Buoy No. 21210).
1)
On
September 3-4 and 10-12, and from October 26 to November 9, 2009, the short
wave radiation data were wrong values since just after strong wind blowing.
2)
On December
2, it was notified that GTS had been receiving underwater data from JKEO4
while it had not been intended. On December 4, the system software sending
the data to GST has been changed not to send wrong data from JKEO4 (WMO
Buoy No. 21210).
3)
Water
temperature and salinity values at nominal depths of 7.5 m and 20 m have
been unstable from December 4, 2009, and water temperature and pressure
values at nominal depths of 200 m from December 29, 2009. These are supposed to be caused by
malfunction of communication system between sensors and ARGOS transmitting
data logger.
4)
Short wave
radiation value has been missed on January 8 -29, April 4- 27, June 10 –
23, and after September 28, 2010.
5)
After July
21, 2010, values of wind speed and direction have been missed due to loss
of propeller.
6)
Values of
air temperature and humidity have been missed after August 14, 2010.
On October 6, 2010, the
buoy left the site and began to drift westward. On October 12, the main top
buoy with top 1-m length wire was recovered by R/V Kairei of JAMSTEC. The
remnants of underwater instruments were recovered by R/V Mirai of JAMSTEC
on February 22, 2011. Delayed-mode data will be available in this site.
Last Updated on March 9, 2011
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