A. Cruise Report: PR14 A.1 Cruise Narrative A.1.1 Highlights WOCE Section: PR14 Expocode: 20VDPR1497_1 Chief Scientist: Dante Gutierrez B. 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. Port of call: Talcahuano, CHILE. Cruise Dates: March 15 - April 10, 1997 A.1.2 Cruise Summary Cruise Track: The cruise track and station locations are shown in figure 1. Number of stations: A total of 50 hydrographic stations were performed using a sealogger 19 CTD model 1240 and a sealogger 25. 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 RESPONSIBILITY INSTITUTION ----------------------- ------------------------------------- ----------- EaC. Dante Gutierrez B. Chief of Watch 1, Computer Operator, SHOA Cruise Logger, Form filer. C1. Raul Estrada A. Chief of Watch 2, Computer and SHOA Seabeam, cruise logger , METEO/S.H.I.P message sender. A.1.4 Scientific Programme and methods The principal objectives of the cruise were: - To collect necessary information to develop ocean circulation models to predict decade climatic changes in order to contribute to international WOCE program. Preliminary Results A.1.5 Major Problems Encountered on the Cruise 1) Major problems were related to Deck unit failure and water filtration at the cable connector unit. 2) Bad weather at the study area A.1.6 Other Observations of Note: CTD 19 model 1240 had problems at the beginning of the cruise . therefore, the first station were performed with a CTD 25 (belongs to the Catholic University of Valparaíso). A.1.7 List Of Cruise Participants NAME RESPONSIBILITY INSTITUTION ------------------------------- ---------------------------------- ----------- EaC. D. Gutierrez B. Chief of watch 1 SHOA S1 Serv. (Oc. Bas) Sr. P. Urzúa Winche operator SHOA C1. (Me. S.) A. Martinez Seabeam & ecosounder maneuver. V. Gormaz M.Serv. (Oc. Bas.) M. Higueras CTD-maneuver, XBT launcher, water sampler SHOA M. Serv. (Oc. Bas) H. Gatica Water sampler SHOA C1. Serv. (Oc. Bas) R. Estrada Chief of watch 2, computer handler, SHOA data logger S1. Serv. (Oc.) M. Placencia Winche operator. V. Gormaz C1. (Mc. S.) E. Jerez Seabeam & ecosounder maneuver SHOA M. Serv. (Oc. Bas.) C. Saavedra CTD-maneuver, XBT launcher, water sampler SHOA M. Serv. (Oc. Bas.) J. Cortez Water 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 50 XBT launches (T7) were performed. A.2.6 Meteorological Measurements Meteorological data measured were : wind speed and direction, air temperature, 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 were a CTD seabird 25 (first 44 stations) and a Sealogger- 19 model 1240 (last 6 stations). The last CTD had malfunctions after this cruise. It was sent to Factory for reparations and all sensors were replaced. Therefore, the time drift of the instrument was lost and data could not been corrected accordingly. A.3.7 CTD Data collection and processing Data registry: DATE STATION -------- ----------------- 03/16/97 1,2 03/17/97 4, 5, 6 03/18/97 7, 8 03/22/97 9 03/23/97 10, 11, 12, 13 03/24/97 14, 15, 16, 17 03/25/97 18, 19, 20 03/26/97 21, 22 03/27/97 23 03/29/97 33, 34 03/30/97 35, 36, 37, 38, 39 03/31/97 40 04/01/97 24 04/02/97 26 04/03/97 27, 28, 29, 30, 31 04/04/97 25, 32 04/05/97 41 04/06/97 42, 43, 44, 45, 46 04/07/97 47, 48, 49, 50 CTD SBE-25 model 1813 This CTD was acquired in June/1995 and it first calibration was made in August /1997, Therefore, the calibration coefficients were the ones from 1995 applying the slope and offset lineal drift according to 1997 calibration. Temperature: G = 4.84362130E-03 offset1= 0.0142 offset6= 0.0147 H = 6.77464130E-04 offset2= 0.0143 I = 2.72222137E-05 offset3= 0.0144 J = 2.21258685E-06 offset4= 0.0145 F0= 1000 offset5= 0.0146 Day B n B/n Post-delta(t) Offset --- --- --- -------- ------------- ------ 16 627 773 0.811125 -0.01746 0.0142 17 628 773 0.812419 -0.01746 0.0142 18 629 773 0.813712 -0.01746 0.0142 22 633 773 0.818887 -0.01746 0.0143 23 634 773 0.820181 -0.01746 0.0143 24 635 773 0.821474 -0.01746 0.0143 25 636 773 0.822768 -0.01746 0.0144 26 637 773 0.824062 -0.01746 0.0144 27 638 773 0.825355 -0.01746 0.0144 29 640 773 0.827943 -0.01746 0.0145 30 641 773 0.829236 -0.01746 0.0145 31 642 773 0.830530 -0.01746 0.0145 1 643 773 0.831824 -0.01746 0.0145 2 644 773 0.833117 -0.01746 0.0145 3 645 773 0.834411 -0.01746 0.0146 4 646 773 0.835705 -0.01746 0.0146 5 647 773 0.836998 -0.01746 0.0146 6 648 773 0.838292 -0.01746 0.0146 7 649 773 0.839586 -0.01746 0.0147 Conductivity: M = 4.5 offset= 0 A = 7.19611919E-06 slope1= 0.99993 B = 5.41883750E-01 slope2= 0.99992 C = -4.14061857E+00 slope3= 0.99991 D = 1.34395405E-04 Cpcor = -9.5700E-08 Day B n b/n (pre-slope)-1 slope --- --- --- -------- ------------- -------- 16 627 773 0.811125 -0.000311 0.999745 17 628 773 0.812419 -0.000311 0.999745 18 629 773 0.813712 -0.000311 0.999745 22 633 773 0.818887 -0.000311 0.999745 23 634 773 0.820181 -0.000311 0.999745 24 635 773 0.821474 -0.000311 0.999745 25 636 773 0.822768 -0.000311 0.999744 26 637 773 0.824062 -0.000311 0.999744 27 638 773 0.825355 -0.000311 0.999744 29 640 773 0.827943 -0.000311 0.999744 30 641 773 0.829236 -0.000311 0.999744 31 642 773 0.830530 -0.000311 0.999744 1 643 773 0.831824 -0.000311 0.999744 2 644 773 0.833117 -0.000311 0.999744 3 645 773 0.834411 -0.000311 0.999744 4 646 773 0.835705 -0.000311 0.999744 5 647 773 0.836998 -0.000311 0.999744 6 648 773 0.838292 -0.000311 0.999744 7 649 773 0.839586 -0.000311 0.999744 Pressure A0 = 537.701 Offset= 0 A1 = -1.379409E+00 A2 = -4.139641E-09 Therefore, six *.con cofiguration files were created (PR14-97 A.con a PR14-97 f.con Processing Step1 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 AlingCTD 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. The data remain non-public access until new notification. However, specific authorisation will be forwarded to interested scientist if their goals do not overlap SHOA's goals. For major information write to: Ricardo Rojas Chief of CENDOC Casilla 324 Valparaíso 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. Location of hydrographic stations during PR14-97