R/V Shumpu Maru Cruise SU9402


1 Cruise Narrative

1.1 Highlights

 Expedition Designation
           Shumpu Maru Cruise SU9402

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

 Ship
           R/V Shumpu Maru

 Ports of Call
           Leg 2:Komatushima to Kochi

 Cruise Dates
           Leg 2:February 13 to February 20,1994

1.2 Cruise Summary

   The cruise track and station locations of leg 2 are shown in Figure 1.
   The ship departed Komatushima on February 13,1994, and made 2 CTD/rosette stations
of a section PR17. 1 XBT stations were made between CTD/rosette stations. 
To first CTD/rosette station the ship reached at 2314 UTC on February 17, from
last station departed at 0859 UTC on February 18.

   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
                 Ryohei OKADA         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
                 
                 Kouji HAYASHI        Chief Scientist         KMO
                 Sukeyoshi TAKATANI   Oxygen, Nutrients       KMO
                 Ryohei OKADA         CTD Hardware            KMO
                 Nobuo SATO           Oxygen, Nutrients       KMO
                 Hiroki SUZUKI        CTD Software            KMO
                 Akira NAKADATE       Oxygen, Nutrients       KMO
                 Keiichi SATO         Watch Stander           KMO
                 Hayato WAKIMOTO      Watch Stander           KMO
                 Toshiaki BABA        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 SEA 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 interpolatin inside the 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 December 15, pre-creise)
         Standard Temperature     CTD Temperature      Difference
                0.0409                 0.0379             0.0030
                1.0037                 1.0001             0.0036
                2.0041                 2.0002             0.0039
                3.0045                 3.0004             0.0041
                4.0044                 4.0001             0.0043
                5.0046                 5.0003             0.0044
                6.0050                 6.0005             0.0045
                7.0045                 6.9998             0.0047
                8.0052                 8.0003             0.0049
                9.0050                 8.9998             0.0052
               10.0050                 9.9999             0.0051
               11.0050                11.0001             0.0049
               12.0053                12.0006             0.0047
               15.0512                15.0471             0.0042
               17.5359                17.5320             0.0039
               20.0594                20.0562             0.0031
               25.0204                25.0181             0.0022
               29.9502                29.9493             0.0009

     Pressure(increasing, Caliblated on December 28, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      1.6               -1.6
               98.0                     98.0                0.0
              293.9                    293.4                0.5
              489.9                    489.2                0.6
              979.7                    980.3               -0.6
             1959.4                   1960.5               -1.1
             2939.1                   2937.7                1.4
             3918.8                   3915.7                3.1
             4898.5                   4895.6                2.9
             5878.2                   5878.3               -0.1

     Pressure(decreasing, calibiated on December 28, pre-cruise)
         Standard Pressure        CTD Pressure         Difference
                0.0                      0.4               -0.4
               98.0                    100.8               -2.8
              293.9                    298.0               -4.1
              489.9                    495.2               -5.4
              979.7                    986.4               -6.7
             1959.4                   1963.3               -3.9
             2939.1                   2938.7                0.4
             3918.8                   3915.6                3.2
             4898.5                   4895.4                3.1
             5878.2                   5878.3               -0.1

   The conductivity sensor were calibrated at sea using data from the analyses
of salinity collected at 3 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                1.00000

    The temperature of "SU9402.SEA" and "SU9402.CTD" files is 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.
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