A      Cruise Report: PR14, 1996

A.1    Cruise Narrative

A.1.1  Highlights

WOCE Section      P14
ExpoCode          20VDPR1496_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.
Ports of call:    Talcahuano, CHILE.
Cruise Date:      August 5-29/1996


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                     RESPONSABILITY                        INST.
----------------------   ------------------------------------  ----
EaC. Dante Gutierrez B.  Chief of Watch 1, Computer Operator,  SHOA
                           Cruise Logger, Form filer.  
C1. Felipe Jaramillo G.  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
       Major problems during the realization of the cruise, were the continuos  
       passing of weather fronts through the study area, difficulting  the 
       sampling and damaging the instruments.

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                      RESPONSABILITY                    INST.
----------------------    --------------------------------  ---------
EaC. D. Gutierrez B.      Chief of watch  1                 SHOA
C1 Serv. (Oc. Bas) Sr.    Chief of watch 2                  SHOA
  F. Jaramillo  
S1. (Mec El.) R. Castro.  Seabeam controller.               SHOA
C1.Serv. (Db. Cart.)      Sea surface temperature sampler.  SHOA
  J. Freire.  
C1. Serv. (Oc.) J. Caro.  Winche operator.                  V. Gormaz
C1. (Met.) J. Bravo E.    CTD maneuver, XBT launcher,       SHOA
                            meteo-rological sampler, 
                            rossette sampler.  
S1. Serv. (Oc.) M.        Winche operator.                  V. Gormaz
  Placencia.  
C1. (Mc. S.) A. Martinez. Seabeam controller.               SHOA
M. Serv. (Oc. Bas.) P.    TD maneuver, XBT launcher,        SHOA
  Bizama                    meteo-rological    sampler, 
                            rossette sampler.  

  

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  36  XBT launches (T5 and 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 instrument used was a CTD Sealogger-19 model 1240. This instrument 
       had problems (malfunction) after this cruise. It was sent to USA for 
       reparations and all its sensors was replaced . Therefore, the drift of 
       the instrument was lost and data could not be corrected.  

A.3.7  CTD Data collection and processing

Data registry

       DATE      STATION
       --------  ----------------------
       08/14/96  1,2,3,4
       08/15/96  5, 6, 7, 8
       08/16/96  9, 10, 11, 12
       08/17/96  13, 14
       08/18/96  15, 16
       08/19/96  17, 18
       08/20/96  19, 20, 21
       08/21/96  22, 23, 24, 25
       08/22/96  26, 27, 28, 29, 30, 31
       08/23/96  32, 33, 34
       08/24/96  35, 36, 37, 38, 39, 40
       08/25/96  41, 42, 43
       08/26/96  44, 45, 46, 47, 48, 49
       08/27/96  50
       

CTD-Seabird 25 (belongs to the Catholic University of Valparaiso,UCV)
       This instrument was never calibrated , therefore, there is no lineal 
       drift in time. The data processing was made assuming no correction to the 
       instrument. Calibration coefficients are

Temperature:
    
       A =     3.68019763E-03  Offset = 0
       B =     6.02138651E-04   Slope = 1
       C =     1.53464870-05  
       D =     2.39807954E-06   
    
Conductivity:
    
       M =     4.4             Offset = 0
       A =     1.12073634E-05   Slope = 1
       B =     5.62493696E-01  
       C =    -4.10873301E+00  
       D =    -1.67289063E-05  
   Cpcor =    -9.5700E-08  
       
Pressure
    
       A0 = 5338.009           Offset = 0
       A1 =   -1.379122E+00  
       A2 =    9.064474E-08  


CTD-Seabird 19
       This CTD was calibrated on February 16/1996, after the cruise the sensors 
       were replaced so the time drift were lost. CTD data were made assuming 
       first sensors no affected by time drift. The calibration coefficients 
       were:

Temperature:

       A =     3.67473865E-03  offset =  0
       B =     5.80221837E-04   slope =  1
       C =     9.17287476E-06    
       D =    -6.71372608E-07    

Conductivity:

       M =     3.9             offset =  0
       A =     4.56297616E-05   slope =  1
       B =     4.97796218E-01    
       C =    -4.14651601E+00    
       D =     5.67587208E-04    
   CPcor =    -9.5700E-08    
       
Pressure

       A0 = 4967.345           offset =  0
       A1 =   -1.301226E+00    
       A2 =    4.343377E-08    
       

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. e) 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.  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.  Location of hydrographic stations during PR14-96







