R/V Shumpu Maru Cruise SU9404 1 Cruise Narrative 1.1 Highlights Expedition Designation Shumpu Maru Cruise SU9404 Chief Scientists Leg 1:Noriya YOSHIOKA, Kobe Marine Observatory(KMO) Ship R/V Shumpu Maru Ports of Call Leg 1:Kobe to Kochi Cruise Dates Leg 1:April 28 to May 6,1994 1.2 Cruise Summary The cruise track and station locations of leg 1 are shown in Figure 1. The ship departed Kobe on April 28,1994, 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 1721 UTC on April 30, from last station departed at 2151 UTC on May 1. 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 Kouji KADONO Oxygen, Nutrients KMO Noriya YOSHIOKA CTD, S KMO 1.4 List of Cruise Participants The cruise participants for leg 1 are listed in Table 2. Table 2: Cruise Participants for leg 1 Name Responsibility Affiliation Noriya YOSHIOKA Chief Scientist KMO Kouji KADONO Oxygen, Nutrients KMO Tadayoshi UTUNOMIYA CTD Hardware KMO Akira NAKADATE Oxygen, Nutrients KMO Satoshi SUGIMOTO CTD Software KMO Syuji TUBAKI Oxygen, Nutrients KMO Keiichi SATO Watch Stander KMO Hayato WAKIMOTO Watch Stander KMO Hiroki SUZUKI Watch Stander KMO Kiyoshi MURAKAMI 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 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 4 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 1.00022 The temperature of "SU9404.SEA" and "SU9404.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.