A Cruise Report: SR01 A.1 Cruise Narrative A.1.1 Highlights WOCE Line SR01 Expocode 20VDSR0194_1 Chief Scientist: Capitán de Corbeta Jorge Maturana Lavin. Servicio Hidrográfico y Oceanográfico de la Armada (SHOA). Errázuriz 232, Playa Ancha. Valparaíso, Chile. Teléfono: 56-032-266666 Fax: 56-032-266542 Ship AGOR60 - Vidal Gormaz. Ports of call Punta Arenas, Chile Cruise Dates November 08 - December 09 1994 A.1.2 Cruise Summary Cruise Track The cruise track and station locations are shown in figure 1. Number of stations A total of 18 hydrographic stations were performed using a CTD sealogger model 1064 (first three stations) and a CTD sealogger model 1240 (the remaining stations). Sampling continuos profiles of temperature and salinity were made using a CTD. Floats, Drifters, and Moorings (None) A.1.3 List of principal Investigators NAME RESPONSABILITY Inst. ------------------------------------------------------------------------ CC. Sr. J. Maturana L Chief Scientist. SHOA EaC. Sr. D. Gutierrez Chief of watch 1,computer operator. SHOA EaC. Srta. Y. Guerrero Chief of watch 2,computer operator. SHOA A.1.4 Scientific Programme and methods The principal objectives of the cruise were to collect necessary information to increase the scientific knowledge of the dynamic of the Antarctic Circumpolar Current at Drake Passage in order to contribute to international WOCE program. Preliminary Results A.1.5 Major Problems Encountered on the Cruise * The Rosette sampler was lost due to a winch operation problem. * Many problems with the XBT probes made unsuccessful launches. * Iceberg drifting and ice debris in the area of study and also poor visibility made difficult conditions to accomplish the hydrographic stations. A.1.6 Other Observations of Note Due to the lost of the CTD 19 model 1064 the first three stations could not be corrected. A.1.7 List Of Cruise Participants NAME RESPONSABILITY INST. ------------------------------------------------------------------------- -- CC. Sr. J. Maturana Chief Scientist SHOA C1° (Met) J. Bravo Meteorologist SHOA EaC. Sr. D. Gutierrez Chief of watch 1 SHOA S2° Serv. (Oc) P. Urzúa Winch operator and Rosette meneuver SHOA C1° Serv. (Oc) R. Montecinos Winch operator and Rosette meneuver SHOA M° Serv. (Oc) D. Meza Oxygen análisis SHOA M° Serv. (Oc) C. Saavedra M. XBT launcher , salinity sampler. SHOA EaC. Srta. Y. Guerrero A. Chief of watch 2 SHOA S2° Serv. (Oc) A. Sanchez R Winch operator, XBT launcher SHOA C1° Serv. (Db.C) J. Freire . Water sampler SHOA M° Serv. (Oc) P. Altamirano F. Rosette manoeuvre , oxygen analysis SHOA M° Serv. (Oc) M. Higueras M. XBT launcher , salinity sampler. SHOA A.2 Underway Measurements A.2.1 Navigation (Not available) A.2.2 Echosounding (Not available) A.2.3 Acoustic Doppler Current Profiler (ADCP) (None) A.2.4 Thermosalinograph Measurements: (None) A.2.5 XBTs A total of 18 XBT launches (T5 and T7) were performed. A.2.6 Meteorological Measurements Meteorological data measured were: wind speed and direction, air temp., atmospheric pressure. A.3 Hydrographic Measurement Techniques and Calibration A.3.1 Sample Salinity Measurements (Not sampled) A.3.2 Sample Oxygen Measurements (Not sampled) A.3.3 Nutrients (Not sampled) A.3.4 CFC (Not sampled) A.3.5 Samples taken for other chemical measurements (None) A.3.6 CTD Measurements The CTD used was a Sealogger-19 model 1240 bought by SHOA in 1992, whose first calibration was made in 1995. A.3.7 CTD Data collection and processing Data registry: DATE STATION -------------------------------------- 11/19/1994 1, 2, 3, 4 11/20/1994 5,6,7,8,9 11/21/1994 10, 11, 12, 13, 14, 15, 16 11/22/1994 17, 18 CTD SBE-19 model 1240 It was bought by SHOA in 1992 and it first calibration was made in 1995. Therefore, the calibration coefficients used were the ones from the 1992 with the slope and offset calculated from the lineal time drift. Temperature: A = 3.67439294E-03 Slope = 1 B = 5.79923710E-04 Offset = -0.0011 C = 8.23609887E-06 D = -1.55263735E-06 FO = 2408.120 Day B n b/n post-delta(t) offset -------------------------------------------- 19 750 850 0.8823529 0.00129 -0.0011 20 751 850 0.8835294 0.00129 -0.0011 21 752 850 0.8847059 0.00129 -0.0011 22 753 850 0.8858824 0.00129 -0.0011 b: number of days between calibration and the day of CTD cast. n: number of days between calibrations. Post-delta (T): temperature-drift value according calibration certificate. Conductivity: M = 2.6 Offset = 0 A = 2.33127200E-03 slope1 = 0.999783 B = 4.91763158E-01 slope2 = 0.999782 C = -4.12966273E+00 D = 5.64959638E-04 E = -9.5700E-08 Day B n b/n (Pre-slope)-1 Slope ---------------------------------------------- 19 750 850 0.8823529 -0.000246 0.999783 20 751 850 0.8835294 -0.000246 0.999783 21 752 850 0.8847059 -0.000246 0.999782 22 753 850 0.8858824 -0.000246 0.999782 Therefore, two *.con configuration files were created (SR1-94 A.con and SR1-94 B.con) Pressure A0 = 4966.795 A1 = -1.301054E+00 A2 = 1.217797E-08 Processing Step 1 1. Convert data from *.hex to *.cnv format using DATCNV program and *.con configuration file. 2. Deleting negatives velocities using the leewoce.bas program 3. Checking and cleaning the header files. 4. Computing the average down velocity value (X). 5. to apply the Aling CTD program to correct temperature and conductivity time response shift from the CTD'sensors. Step 2 a) To apply DATCNV program to average observed values meter by meter. Step 3 a) To apply Winfilter program to filter data after step 2 , using a flexible windows determined by the user. A.3.8 Satellite image acquisition and processing (None) A.3.9 Shipboard computing (None) Note: All data from WOCE PR14 and SR1 cruises, have been passed to the National Oceanographic Data Center of Chile (CENDOC) for data management purposes and to be quality controlled according to normal WHPO procedures. Once finished they have been sent to the WOCE Hydrographic Program Office at the Scripps Institution of Oceanography for archival. For major information write to: Ricardo Rojas Chief of CENDOC Casilla 324 Valparaiso CHILE e-mail rrojas@shoa.cl who can direct your request to the appropriate decision channels. Do not write directly to Principal Investigators. Figure 1. Position of stations during WOCE SR1 1994.