R/V Shumpu Maru Cruise SU9307 1 Cruise Narrative 1.1 Highlights Expedition Designation Shumpu Maru Cruise SU9307 Chief Scientists Leg 1 and Leg 2:Ryohei OKADA, Kobe Marine observatory(KMO) Ship R/V Shumpu Maru Ports of Call Leg 1:Kobe to Kagoshima Leg 2:Kagoshima to Kochi Cruise Dates Leg 1:July 13 to July 19,1993 Leg 2:July 24 to July 28,1993 1.2 Cruise Summary The cruise track and station locations of leg 1 and Leg 2 are shown in Figure 1. The ship departed Kobe on July 13,1993, and made 3 CTD/rosette stations of a section PR17. 2 XBT stations were made after CTD/rosette stations. To first CTD/rosette station the ship reached at 1402 UTC on July 16, from last station departed at 1055 UTC on July 17.(Leg 1) The ship departed Kagoshima on July 24,1993, and made 3 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 1128 UTC on July 25, from last station departed at 2104 UTC on July 25.(Leg 2) 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 1 and leg 2 are listed in Table 2. Table 2: Cruise Participants for leg 1 and leg 2 Name Responsibility Affiliation Ryohei OKADA Chief Scientist KMO CTD Hardware Sukeyoshi TAKATANI Oxygen,Nutrients KMO Nobuo SATO Oxygen,Nutrients KMO Satoshi SUGIMOTO CTD Software KMO Akira NAKADATE Oxygen,Nutrients KMO Keiichi SATO Watch Stander KMO Kouji HAYASHI Watch Stander KMO Toshiaki BABA Watch Stander KMO Hiroki SUZUKI 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. 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 in 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(dcreasing) 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 September 6, 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 3 stations. The salinometer is AUTOSAL 8400B(Guildline) for the analyses of salinity of the water samples. The resultes 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 1.00048 The temperature of "SU9307.SEA" and "SU9307.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.