A.   CRUISE NARRATIVE: P02W (ALONG 30 N IN THE NORTH PACIFIC)

A.1. HIGHLIGHTS

                        WHP CRUISE SUMMARY INFORMATION

                WOCE section designation  P02W 
       Expedition designation (EXPOCODE)  492SSY9411_1
Chief Scientist(s) and their affiliation  DR. MIZUNO IWANAGA/MSA*
                                   Dates  1994.NOV.01 - 1994.NOV.14
                                    Ship  S/V Shoyo
                           Ports of call  unknown
                                                       32 44.8'N
   Geographic boundaries of the stations  133 06.80'E            145 05.10'E
                                                       29 59.7'N
                      Number of stations  32
            Floats and drifters deployed  unknown
          Moorings deployed or recovered  unknown
                    Contributing Authors  none cited

                                *Chief Scientist
  Dr. Y. Iwanaga ~ Maritime Safety Agency ~ Hydrographic Department ~ Chuo-Ku
                      5-3-1 Tsukiji ~ Tokyo, 104 ~ JAPAN
                   TEL: 81-33-541-3811 ~ FAX: +81-3-3545-2885

NOTE:  
With the exception of this page and the WHPO Data Processing Notes (end of doc), 
this report is only general information common to all 4 P02 cruises.  No report
for P02W has yet been provided.



A.1. OVERVIEW

P02 was composed of four different cruises which were carried out during the 
period from October 14, 1993 to November 14, 1994 utilizing three different 
observation ships. No large volume sampling was carried out. Most of the 
observation line is located on 30N. But west of 134.5 E, the line goes 
northwest toward Cape Ashizuri along the PCM5 line. Also, east of 123W the 
line bends northeast to avoid Mexican territory.

Two of the four cruises were intended to get high-quality CTD data on high 
density observation stations.  For example, the shortest interval between 
stations is 30 nautical miles around some topographic features, with small 
volume water sampling for nutrient analysis (Salinity, Dissolved oxygen, 
Silicate, Phosphate, Nitrate, (Nitrite) and pH). These two cruises compose the 
central and eastern part of P02, and the western most part of P02, 
respectively. The first cruise (p02e) will begin on 14 October 1993 and the 
latter (p02c)began on the 15th of January, 1994. The third cruise is planned to 
get nutrient and chemical tracers data (Freon, Total Carbon, Tritium, 
Radioactive carbon/sampling only, pC02) mainly at 32 depths with CTD-ROSSETE 
101 system. This cruise (p02t) will start on the 7th January , 1994.  The 
fourth and final cruise, (p02w) which measured ctd data as well as discreet 
salinity and oxygen data, began on November 1, 1994.

Standards for nutrient is controlled by PIs among these three cruises. 
Standards used for these cruise will be re-standardized at Scripps institution 
of Oceanography in the course of first cruise.


A.2. SCIENTIFIC GOALS

To get reliable dataset to estimate meridional transport of physical and 
chemical mass across  30N. Especially, at relatively shallow depths, the zonal 
transport of total carbon and CFCs included in NPIW-corresponding layer and 
NPSTMW are object to be estimated. Also heat and fresh water (and/or salinity) 
fluxes across 30N are subject to be estimated.

From 1991, WOCE-like observation programmes have been carried out along 32.5 N 
by the Hydrographic Department, Maritime Safety Agency and School of Marine 
Science, Tokai University. In these programmes current variations were checked 
by current meter moorings around the Shatsky Rise. Also, nutrient variations 
were examined through 5 different cruises. Results from these programmes show 
that eddies which are associated with the Shatsky Rise give so large effects on 
oceanic conditions around the region. The variation of nutrient profiles excess 
20% of their mean structure at the intermediate depth in magnitude.

In P02 cross section, we encounter three large topographic features, the 
Shatsky Rise, the Emperor Seamount and the Hess Rise. As explained in foregoing 
section, same P02 line will be repeated twice within three months. This 
strategy of operation will help us to know some standard errors in estimated 
fluxes through information about time-dependent oceanic structures.


A.3. LIST OF PRINCIPAL INVESTIGATORS

                      |Principal        |
Parameter             |Investigator(s)  |Affiliation
----------------------|-----------------|------------------------------------------------
CTD02/rosette         |Masao Fukasawa   |School of Marine Science, Tokai University
                      |Ichiro Yasuda    |Tohoku Regional Fisheries Research Laboratory
                      |Hiroyuki Yoritaka|Hydrographic Department, MSA
T,S                   |Hiroyuki Yoritaka|Hydrographic Department, MSA
02                    |Yoshihisa Kato   |School of Marine Science, Tokai University
                      |Katsumi Yokouchi |Tohoku Regional Fisheries Research Laboratory
N03, NO2, NH4         |Hiromi Kasai     |Hokkaido Regional Fisheries Research Laboratory
P04, SiO2             |Chizuru Saito    |National Institute for Environmental Studies
3H, 14C, CFC         |Yutaka Watanabe  |National Institute for Resources and Environment
Sig.C02/pH/Alkali/pCO2|Tsuneo Ono       |Faculty of Fisheries, Hokkaido University
T (underway), ADCP    |Ichiro Yasuda    |Tohoku Regional Fisheries Research Laboratory
S (underway)          |Masao Fukasawa   |School of Marine Science, Tokai University
XBT                   |Hiroyuki Yoritaka|Hydrographic Department, MSA
Moorings              |Masao Fukasawa   |School of Marine Science, Tokai University
Surface Drifters      |Yutaka Michida   |Hydrographic Department, MSA


4.  WATER SAMPLING EQUIPMENT AND UNDERWAY MEASUREMENTS


5.  CRUISE TRACK AND STATIONS

Station positions are shown on Figure 1, where solid circles show stations for 
small volume sampling (Kaiyo-maru). Stations are fundamentally spaced at 30 nm 
interval, and spaced at 48 nm interval over flat bottom region, along 30N. In 
western boundary, stations are spaced at 10-15 nm interval along PCM5 line. In 
eastern boundary, stations are spaced at 28 nm interval. Small volume sampling 
(CFCs, Tritium, Radioactive Carbon) wiere be carried out every 2 or 3 stations 
(at 60-96 nm interval).




WHPO DATA PROCESSING NOTES

Date      Contact     Data Type  Data Status Summary
--------  ----------  ---------  ---------------------------------------------
02/24/99  Talley      I.D.       Data Update  Identify line as 
          P02a for now
          
03/26/99  Yoritaka    BTL/DOC    flags and doc requested by scd  
          First, there are only 3 flags for each measurement, but there are 5 
          potential parameters that could be flagged.  We *think* that the 
flags 
          are for CTDSAL, SALNTY and OYXGEN.  Could you confirm this please?
          
          Second, are these data to be made public?  Right now they are  
          encrypted on our website.  Please let us know.
          
          Finally, I have no documentation for this cruise.  Do you have any 
          that could be transmitted electronically?
          
04/15/99  Bartolacci  SUM        .sum files (p02w, p02e, p02c) and updated 
          In the case of p02c and p02e the sum file changes  (via Lynne)were 
          correcting the occurrances of the old line number designation  with 
          the new line number designation, and (by me)replacing the slashes in 
          the  expocode to underscores.  (See Lynne's emails below)
                    
          IN the case of p02w the .sum file changes made (by Lynne) were 
          converting  decimal degrees into degrees and minutes in the lats 
          and lons; the time was converted to GMT; station no. now has place 
          holding zeros; cast type was changed  from CTD to ROS; and height 
          above bottom, wire out, and no. of bottles columns  were also 
          added.  This conversion has shifted columns, however I ran sumchk 
          on it with no errors.  Slashes in the expocode were also replaced 
          by underscores.
          
          I have also replaced the corrupted P2E119.WCT file with Lynne's 
          updated version,  and updated the table to reflect this.  The 
          table was also corrected to reflect the *bottle* data file being 
          encrypted, NOT the .sum file (previously the table indicated the 
          .sum file was Non-public and the bottle file was public).
          


Date      Contact     Data Type  Data Status Summary
--------  ----------  ---------  ---------------------------------------------
04/15/99  Talley      SUM        Data file reformatted Update 
          I took Yoritaka's p02wsu.txt file and got it into the right column 
          format.  some of the information in it has changed slightly from the 
          previous version.  Most importantly, lat and long are now in degrees 
          and minutes.
          
          I have place p02wsu.txt in my ftp area on whpo.ucsd.edu
          
09/19/00  Michida     BTL        Data should probably be public     
          With regard to the hydrographic data collected by Japanese groups, 
          I found that the present status of availability of the data for 
          P02E and P02W appeared as 'NP' in the listings of WHPO web site. I 
          believe they should be ready to be made public.  Have you had any 
          contact to or from Mr Yoritaka, the present contact person for 
          both lines? I will be pleased to ask him to confirm that the data 
          are to be public, if necessary.
          
12/20/00  Kappa       DOC        Doc Update  txt version assembled
          
01/22/01  Huynh       DOC        Website Updated  txt version put online
          


Date      Contact     Data Type  Data Status Summary
--------  ----------  ---------  ---------------------------------------------
03/09/01  Yoritaka    CTD/BTL    Data are Public  database updated 
          I would like to consent to open Bottle_S/O2 and CTD data on P2E and 
          P2W to  the public as PI.  Then, would you please change some 
          information on the summarized table of WHP one time cruises on web as 
          follows;
          
          P02W; CS: Iwanaga, Mizuno -> Iwanaga/(HD)MSA SHIP: SYOYO -> SHOYO
          
03/19/02  Bartolacci  CTD/BTL    Website Updated  Status Changed to Public   
          I have unencrypted the bottle and ctd files for this cruise as they 
          were released to the public by Yoritaka on 2001.03.09. Index page has 
          been updated to reflect this change. 
          
04/12/02  Talley      CTD        Update Needed; some DQ flags appear incorrect 
          Just a note for the files - the deep CTD data from stations A7-A13 on 
          p02w has a lot of problems.  Most of the profiles have large sections 
          with both temperature and salinity flagged "6". When I compute 
          potential density (sigma 0, sigma 4 and neutral density), it appears 
          that the chunks of data surrounding these flagged portions are also 
          suspect, leading to marked deep density inversions (over many tens of 
          dbars).
          
          I don't have a way to do rigorous quality control or reprocessing 
          of these data. I also don't have an easy way to determine what 
          additional parts of each station's data should be flagged. This is 
          just a heads up to anyone planning to use these data that they 
          appear to have quite major problems.  And if there is a data 
          quality control queue, it might pay off to have a data set like 
          this near the top, since it clearly has problems.
          
          For the printed atlas, we will just do judicious hand editing of 
          the inverted contours in density.
          


Date      Contact     Data Type  Data Status Summary
--------  ----------  ---------  ---------------------------------------------
04/16/02  Anderson    CTD        Website Updated   
            ~ blank lines at ends of files removed   
            ~ Replaced ctd .zip file with file received from Lynne Talley. 
              She reformatted all ctd files to remove blank line that was at 
the 
              end of each file.  
            ~ No changes to data or flags.
          
05/02/02  Anderson    BTL        Deleted the ***'s for CTDSAL and CTDOXY  
          There were not enough Q1 flags for the number of parameters with 
          ***'s. After looking at the data it was obvious that the CTDSAL and 
          CTDOXY were the parameters that should not have the ****'s
          
          There were 5 parameters with ***'s, but there were only 3 Q1 
          flags. After looking at the data it became obvious that the CTDSAL 
          and CTDOXY should not have ***'s.
          
          Removed the ***'s from CTDSAL and CTDOXY
                
03/31/03  Kappa       DOC        replaced incorrect doc on website w/ new doc 
          Earlier online cruise report was for the wrong leg of p02.  
          currently do not have any doc info. for p02w except the 
          introduction (which is common to all 4 legs) and these data 
          processing notes.  Also added the whpo-sio generated station 
          track.
          
          

