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





