R/V Shumpu Maru Cruise SU9302


1 Cruise Narrative

1.1 Highlights

 Expedition Designation
           Shumpu Maru Cruise SU9302

 Chief Scientists
           Leg 2:Nobuo SATO, Kobe Marine Observatory(KMO)

 Ship
           R/V Shumpu Maru

 Ports of Call
           Leg 2:Hososima to Kochi

 Cruise Dates
           Leg 2:February 12 to February 17,1993

1.2 Cruise Summary

   The cruise track and station locations of leg 2 are shown in Figure 1.
   The ship departed Hososima on February 12,1993, and made 6 CTD/rosette
stations of a section PR17. 4 XBT stations were made between CTD/rosette
stations. To first CTD/rosette station the ship reached at 2246 UTC on February
12, from last station departed at 0433 UTC on February 14.

   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       KMO
                 Yasushi TAKATHUKI    CTD, S                  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
                 Nobuo SATO           Chief Scientist         KMO
                                      Oxygen, Nutrients
                 Yasushi TAKATHUKI    CTD Hardware            KMO
                 Sukeyoshi TAKATANI   Oxygen, Nutrients       KMO
                 Syunta NAITOO        CTD Software            KMO
                 Ichirou TERASHIMA    Oxygen, Nutrients       KMO
                 Keiichi SATO         Watch Stander           KMO
                 Atushi OBATA         Watch Stander           KMO
                 Hayato WAKIMOTO      Watch Stander           KMO
                 Hiroki SUZUKI        Oxygen, Nutrients       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 SEA CO., LTD before the cruise. The results are shown in Table 3.
   Temperature 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 January 8, pre-cruise)
         Standard Temperature     CTD Temperature      Difference
                0.9780                 1.0005            -0.0226
                1.9783                 1.9998            -0.0215
                5.0641                 5.0858            -0.0216
                7.5101                 7.5325            -0.0224
               10.2024                10.2261            -0.0237
               12.5013                12.5257            -0.0244
               15.0366                15.0631            -0.0265
               20.0372                20.0648            -0.0276
               25.0080                25.0375            -0.0296
               30.0841                30.1176            -0.0335

     Pressure(increasing, Caliblated on January 1, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      0.2              -0.2
               98.0                     97.4               0.6
              293.9                    292.5               1.5
              489.9                    489.7               0.2
              979.8                    982.9              -3.1
             1959.6                   1963.7              -4.1
             2939.5                   2941.2              -1.7
             3919.3                   3918.6               0.7
             4899.1                   4897.1               2.0
             5878.9                   5877.3               1.6

     Pressure(decreasing, calibiated on January 1, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      1.6              -1.6
               98.0                    101.4              -3.4
              293.9                    298.6              -4.7
              489.9                    496.3              -6.4
              979.8                    988.2              -8.4
             1959.6                   1965.9              -6.3
             2939.5                   2941.9              -2.4
             3919.3                   3918.6               0.7
             4899.1                   4897.0               2.1
             5878.9                   5877.3               1.6

   The conductivity sensor were calibrated at sea using data from the analyses
of salinity collected at 5 stations. The salinometer is AUTOSAL 8400B(Guildline)
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                1.00010

    The temperature of "SU9302.SEA" and "SU9302.CTD" files is decribed 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.
