A. CRUISE NARRATIVE: PR17 WHP Cruise Summary Information A.1 HIGHLIGHTS WOCE section designation PR17 Expedition designation (EXPOCODE) 49SU9202_4 Chief Scientists Nobuo SATO, Kobe Marine Observatory(KMO) Cruise Dates February 25 to February 29, 1992 Ship R/V Shumpu Maru Ports of Call Kobe to Kochi Number of stations 10 31° 12.07'N Geographic boundaries of stations 131° 30.27'E 133° 29.5E 29° 27.95'N Floats and drifters deployed 0 Moorings deployed or recovered 0 A.2 Cruise Summary The cruise track and station locations of leg 4 are shown in Figure 1. The ship departed Kobe on February 25, 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 1030 UTC on February 26, from the last station departed at 1214 UTC on February 27. 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. A.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 A.4 List of Cruise Participants The cruise participants for leg 4 are listed in Table 2. Table 2: Cruise Participants for leg 4 Name Responsibility Affiliation ----------------------------------------------------- Nobuo SATO Chief Scientist KMO Oxygen, Nutrients, PH Ryohei OKADA CTD Hardware KMO CTD Software Sukeyoshi TAKATANI Oxygen, Nutrients, PH KMO Hiroki SUZUKI Oxygen, Nutrients, PH KMO Shunta NAITO Watch Stander KMO Keiichi SATO Watch Stander KMO Jun OBATA Watch Stander KMO Akiyoshi AWANO Watch Stander KMO Yasuji HATA 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 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(Calibrated on January 31, pre-cruise) Standard CTD Temperature Temperature Difference ------------------------------------ 1.9726 1.9872 -0.0146 3.5818 3.5966 -0.0148 5.2368 5.2514 -0.0146 7.4751 7.4903 -0.0152 10.2274 10.2434 -0.0160 12.5938 12.6111 -0.0173 15.0394 15.0582 -0.0188 20.1280 20.1500 -0.0220 25.1896 25.2145 -0.0248 30.1553 30.1818 -0.0265 Pressure(increasing, Calibrated on January 31, pre-cruise) Standard CTD Pressure Pressure Difference ------------------------------ 0.0 4.5 -4.5 98.0 102.1 -4.1 293.9 297.8 -3.8 489.9 494.3 -4.3 979.8 986.2 -6.3 1959.6 1966.6 -7.0 2939.5 2944.1 -4.6 3919.3 3921.3 -2.1 4899.1 4899.8 -0.7 5878.9 5879.7 -0.8 Pressure(decreasing, calibrated on January 31, pre-cruise) Standard CTD Pressure Pressure Difference ------------------------------ 0.0 5.1 -5.1 98.0 104.1 -6.1 293.9 302.0 -8.1 489.9 499.6 -9.7 979.8 991.4 -11.6 1959.6 1969.0 -9.3 2939.5 2944.8 -5.4 3919.3 3921.4 -2.1 4899.1 4899.7 -0.6 5878.9 5879.7 -0.8 We collected water samples at 5 stations to decide the conductivity sensor calibration constants, and done salinity analyses by using the salinometer, AUTO-LAB model 1601. But the measured salinity value of the water samples were too low to decide the calibration constants, for example, 34.634 (pss) for the sample collected at the depth of 3782 decibar in pressure. In the result, we assume the conductivity sensor calibration constants in Table 4, not using the measured salinity value of the water samples. Table 4: The conductivity sensor calibration constants Bias Slope ------------- 0 1.00000 The temperature of "SU9202.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 SU9202.SUM, SU9202.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 followed 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 "SU9202.SUM", we leave some position column blank(when bucket was used) because not recorded. In "SU9202.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 give 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. WHPO SIO Data Processing Notes Date Contact Data Type Data Status Summary ---------------------------------------------------------------------------- 10/20/99 Bartolacci CTD/BTL/SUM Submitted being reformatted by s.anderson 08/04/00 Saiki CTD/BTL Data are Public I am pleased to inform you that the PIs and participants of the one-time and repeat cruises conducted by the Japan Meteorological Agency's vessels agreed to change most of the data status to public. 08/17/00 Bartolacci CTD/BTL/SUM Website Updated data unencrypted, reformatted SUM, CTD, Bottle As per Masaro Saiki this data has been unencrypted and made public. The sumfile, bottle file and CTD files have all been reformatted to conform to WOCE format. 04/20/01 Uribe BTL/SUM Website Updated CSV File Added Bottle file was converted into Exchange format. Website now contains a link to the CSV file. #Station/Cast SU4617/2, SU4618/3, SU4619/3, SU4620/3, SU4621/3, SU4622/3 were removed because of missing navigational data. 06/18/01 Uribe CTD Website Updated CSV File Added, sumfiles need to have gaps filled, see note: CTD was converted to exchange format. New files were put online. Sumfiles needed to go through fix_sum_file.pl to fill in data gaps in order to run exchange code.