GCOS GOOS WCRP/OOPC IX/3
National Data Buoy Center (NDBC) will take place on 1 October 2004, and no impact on the
scientific output or partnerships is foreseen, but will need to be surveyed.
Yutaka Michida briefed the panel on the status of the TRITON moored array. The
presentation, given on behalf of Yoshifumi Kuroda of JAMSTEC, is available on the meeting
website. The TRITON array, consisting of 17/18 moorings in the western Pacific and 2 in the
Indian Ocean has been stable, however a level funding situation in Japan makes it difficult to
maintain the full array. Improved technology with reduced cost and collaboration with the
Indonesian BPPT (see Section 7.3.3) may improve the situation.
Discussion by the OOPC centered around salinity, which is not publicly released from
the TAO array, and on the frequency of data transmission. The OOPC decided to urge TAO to
make salinity data available, and should liaise with users including the GODAE High
Resolution Sea Surface Temperature (GHRSST) project on the necessary frequency of
The panel heard a report from Brian King, a member of the Argo Steering Team (the
Science Team has renamed itself), his presentation is available on the meeting website. The
Argo array is currently at 40% of its target, though only about 50% of the floats go to 2000 m,
the rest staying closer to the surface. This is mainly a technical limitation, as penetrating the
higher stratification at lower latitudes takes more energy. About 80% of the data gets onto the
GTS or to data centres within 24 hours. Argo data is gradually replacing broadcast mode
XBTs. With 6000 monthly profiles, there is now enough data that in some regions of the
world ocean, Argo now defines the density climatology.
Argo held its first Science Workshop in November 2003, and attracted a large number
of scientists, many not traditionally thought of as part of the program, which demonstrates the
value of the data. The data quality of real time data was higher than expected, and delayed
mode quality assured data will begin to be released in the near future. The outlook for Argo is
good if countries maintain the present deployment rate and float performance continues to
improve as it has. The full 3000 float array should be reached in 2006 7. The lifetime of a
float should be 4 years (150 cycles), though mechanical problems have limited the life of
some. Argo needs: sustained funding, continued improvements in reliability, completion of
data in delayed mode quality control, continued input of ship based CTD profiles for quality
control, an expansion of the user community, and funding for an Argo project office.
Ed Harrison gave the panel an update on the Ship of Opportunity Program (SOOP)
XBT observing network, his presentation is available on the meeting website. XBTs represent
an important source of upper ocean temperature data, along with Argo and moored data. Argo
now has reached a density where broadcast mode sampling of XBTs is unnecessary.
However, repeated high density XBT lines remain an important tool in the detection of
climate variability and change. It is estimated that 5000 more XBTs per year are necessary,
and since the last review of lines was more than 5 years ago, it is time again for a review of
the requirements. JCOMMOPS has in place facilities to keep track of XBT sampling along
lines. Data are provided by operators with a delay of approximately 3 months. The CLIVAR
representatives were asked to solicit requirements by basin for high resolution repeated XBT