R/V Shumpu Maru Cruise SU9207


1 Cruise Narrative

1.1 Highlights

 Expedition Designation
           Shumpu Maru Cruise SU9207

 Chief Scientists
           Leg 2:Koji HAYASHI, Kobe Marine Observatory(KMO)

 Ship
           R/V Shumpu Maru

 Ports of Call
           Leg 2:Kagoshima to Kochi

 Cruise Dates
           Leg 2:July 19 to July 24, 1992

1.2 Cruise Summary

   The cruise track and station locations of leg 2 are shown in Figure 1.
   The ship departed Kagoshima on July 19, 1992, and made 6 CTD/rosette stations
of a section PR17. 4 XBT stations were made between CTD/rosette stations. 
   To the first CTD/rosette station the ship reached at 1225 UTC on July 19,
from the last station departed at 1732 UTC on July 20.

   The CTD is EG&G NBIS Mark III B(6500 db type,no oxygen sensor). Water samples
were collected from 1.7 liter Niskin bottles mounted on the General Oceanics
Rosette multisampler. However, surface water samples were collected by a bucket.

1.3 List of Principal Investigators

   The principal investigators for all the parameters measured on the cruise
are listed in Table 1.

                 Table 1: Principal Investigators for All Measurements

                    Name               Responsibility     Affiliation
                 Sukeyoshi Takatani Oxygen, Nutrients, PH     KMO
                 Ryohei OKADA       CTD, Salinity             KMO

1.4 List of Cruise Participants

   The cruise participants for leg 2 are listed in Table 2.

                 Table 2: Cruise Participants for leg 2

                    Name               Responsibility        Affiliation
                 Koji HAYASHI         Chief Scientist            KMO
                 Nobuo SATO           Oxygen, Nutrients, PH      KMO
                 Ryohei OKADA         CTD Hardware               KMO
                 Yasushi TAKATSUKI    CTD Software, Salinity     KMO
                 Sukeyoshi TAKATANI   Oxygen, Nutrients, PH      KMO
                 Hiroki SUZUKI        Oxygen, Nutrients, PH      KMO
                 Shunta NAITO         Watch Stander              KMO
                 Yuto WAKIMOTO        Watch Stander              KMO
                 Jun OBATA            Watch Stander              KMO


2 Measurement Techniques and Calibrations

2.1 CTD

   The CTD is EG&G NBIS Mark III B(6500 db type, no oxygen sensor).
   A HP 9000 Series 300 model 330(Hewlett Packard) with a 4 MByte of memory
was used as the primary data collection device. 

   The temperature and pressure sensor were calibrated at the calibration
facility of S¥E¥A CO., LTD before the cruise. The results are shown in Table 3.
   Temprature and pressure(increasing) calibration values are used to correct
CTD data, by linear interpolation inside the calibrated regime. CTD data
outside of the regime is corrected by the calibration values on the boundary,
at the each side.

   Notice that the upcast pressure data is corrected by Pressure(increasing),
not Pressure(decreasing) in Table 3.

     Table 3: The temperature and pressure sensor calibration values

     Temperature(Caliblated on June 24, pre-cruise)
         Standard Temperature     CTD Temperature      Difference
                0.9824                 1.0009            -0.0185
                1.9850                 2.0002            -0.0152
                2.9856                 3.0001            -0.0145
                3.9859                 4.0003            -0.0145
                5.0805                 5.0951            -0.0146
                7.5588                 7.5737            -0.0149
               10.6450                10.6601            -0.0151
               13.1956                13.2111            -0.0156
               15.0509                15.0672            -0.0163
               17.4654                17.4825            -0.0171
               20.1529                20.1707            -0.0178
               25.2091                25.2273            -0.0182
               30.1118                30.1305            -0.0188

     Pressure(increasing, Caliblated on June 30, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      5.1              -5.1
               98.0                    102.5              -4.5
              293.9                    298.3              -4.4
              489.9                    494.6              -4.7
              979.7                    986.6              -6.9
             1959.5                   1967.1              -7.7
             2939.2                   2944.7              -5.5
             3918.9                   3922.0              -3.1
             4898.6                   4900.4              -1.8
             5878.4                   5880.3              -2.0

     Pressure(decreasing, calibiated on June 30, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      5.8               -5.8
               98.0                    104.8               -6.8
              293.9                    302.9               -8.9
              489.9                    500.4              -10.5
              979.7                    992.1              -12.4
             1959.5                   1969.7              -10.3
             2939.2                   2945.6               -6.4
             3918.9                   3922.1               -3.1
             4898.6                   4900.3               -1.6
             5878.4                   5880.3               -2.0

   The conductivity sensor were calibrated at sea using data from the analysis
of salinity collected at 4 stations. The salinometer is AUTO-LAB model 1601
for the analyses of salinity of the water samples. The results are shown in
 Table 4. The calibration constant is determined assuming that the bias 0.

           Table 4: The conductivity sensor calibration constants

                 Bias                Slope
                   0                1.00004

    The temperature of "SU9207.SEA" and "SU????_?.CTD" files are described with
the international temperature scale of 1990, ITS-90.

2.2 Oxygen Measurements

   The determination of dissolved oxygen was done by the modified version of
the Winkler method described in "Kaiyo Kansoku Shishin (Manual of Oceanographic
Observation)" published by the Oceanographical Society of Japan(1970).
No estimation of accuracy and precision and reagent blank has been done.

2.3 Nutrients Analyses

   The nutrients analyses were done by the Technicon Auto Analyzer II described
in "Kaiyo Kansoku Shishin (Manual of Oceanographic Observation)" published by
the Oceanographical Society of Japan(1970). No estimation of accuracy and
precision has been done.

2.4 PH measurements

   The PH measurements were done by the PH meter(Denki Kagaku keiki co.,ltd)
described in "Kaiyo Kansoku Shishin (Manual of Oceanographic Observation)" 
published by the Oceanographical Society of Japan(1970). 
No estimation of accuracy and precision has been done.
   Notice that the order of measurements is 0.01.

2.5 Notes for the SU9207.SUM, SU9207.SEA and SU????_?.CTD files

   The first 2 characters of the file name of *.SUM, *.SEA and *.CTD files are
SU for R/V Shumpu maru of Kobe Marine Observatory. These characters are followd
by the last two digits of the year and the month for the *.SUM and *.SEA files.
For the *.CTD files, the characters SU are followed by the unique station
number and the cast number given by the Japan Meteorological Agency.

   In "SU9207.SUM", we leave some position column blank(when bucket was used)
because not recorded.

   In "SU9207.SEA", we leave "sample number (SAMPNO)" column of the surface
layer blank, because of using bucket.

   All water sample quality flags during this cruise were "3"(or "4","5","9"),
because no estimation of accuracy and precision has been made.

   In "SU????_?.CTD", we gived the value -9 to "NUMBER OBS.", because we lost
the CTD raw data and data number of the observation stations 
when the earthquake was occurred in Kobe, Japan, on January 17, 1995.
