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.