P13J bathymetry: ASCII navigation and bathymetry data files were obtained from K. Taira via Jim Crease on 11/12/98. Update 7/24/2003 L. Talley Expedition designation (ExpoCode) 49HH932_1 Chief scientist and affiliation Keisuke Taira (ORI, U. Tokyo) Ship R/V Hakuho Maru Cruise dates May 13 to May 30, 1993 (Leg 1) "P13J_bathy_original.zip" are the zipped original data files (format specified below) "P13J_bathy_gdc.dat" is the data in Geological Data Center format, including corrected depths at all recorded locations. This assumes that the original data were uncorrected depths at 1500 m/s sound speed. "P13J_bathy_gdc_clean.dat" is the edited data in Geological Data Center format, including corrected depths at all recorded locations. Remove all points between 30.5N and 34.8N and all incorrect depths (> 7000 dbar). Decimated to every 6th point. "P13J_bathydist.dat" is the decimated bathymetry file, projected onto straight lines between station positions, used for plotting the vertical sections. "P13J_sta_bdep.dat" is the station list, with corrected bottom pressures for each station, based on the WHP sum file (station summary file) ----------------------------------------------- Format specifications Ascii Navigation format for "file_bathy_gdc.dat" latitude (xxx.xxx) longitude (xxxx.xxx) unc depth (xxxxx.x) meters corr depth (xxxxx.x) meters month (ii) day (iii) day of the month year (ii) assuming 1900 century hour (ii) minute (ii) second (ii) Julian date (xxxxxxx.xxxxx) Format of "P13J_bathydist.dat" ist (iii) station number (set to 1) dist (ffffff.f) distance (km) along section lat (dddddd.mm) decimal latitude lon (dddddd.mm) decimal longitude dpt (ddddd.d) depth meters Format of P13J_sta_bdep.dat station (iiii) station number distance (xxxxx.x) km along section latitude (xxx.xxx) longitude (xxxx.xxx) pressure (xxxx.x) dbar OR depth in meters -----------------NOTES ON EDITING for P13J----------------- After extracting the portion of the file along 165E, the navigation (latitude/longitude) was plotted. There are some loops and large zigzags, especially near 36-37N. The bottom depth (deppdr) was then plotted as a function of latitude. After deleting missing depths (large values), the bottom depths appear to be problematic between 30.5 and 34.8N. These were deleted, and replaced with Smith/Sandwell altimetric bathymetry data for this latitude band. ------------------------------------------------------------- Original data format: Hakuho-Maru Marine Meteorological Observation System Data D. Yanagimoto, Sep. 1996, based on Otobe and Nakamura (1993) 1.Data acquisition Wind speed and direction are measured at a height of 20 m from the sea surface using propeller and vane, respectively. They are measured every ten seconds, six data during one minute are averaged, the one- minute means are sampled every one minute, and their ten-minute running means are calculated. Then a ship speed is removed from the measured wind data. The ship speed and heading are measured every one minute by speed logger and gyrocompass, and are running averaged for ten minutes. Air temperature, dew point temperature, short-wave radiation, all- wave radiation, precipitation, and atmospheric pressure are measured at 13-15 m hight from the sea surface. Air temperature, dew point temperature, and atmospheric pressure are measured every ten seconds and are recorded every one minute. Precipitation is a summation of pulses (one pulse = 0.004 mm) during one minute. Short-wave radiation and all-wave radiation are measured every ten seconds and averaged for one minute. Sea surface temperature is measured at the ship bottom at about 4 m depth. Sea water is pumped up from the ship bottom to a laboratory, and the water temperature and conductivity are measured with CTD. The conductivity data should be corrected using water-sample data measured by salinometer, in order to calculate salinity. The marine meteorological observation system runs throughout a cruise, and the data are stored every one minute. 2. Data format ---------------------------------------------------------------------- YYMMDD Year Month Day - space HHMMSS Hour Minute Second -- two spaces ?** **.**** Latitude (N/S degree space minute) -- two spaces ?*** **.**** Longitude (E/W degree space minute) C/R carriage return ***.* System heading (degreeT) -- two spaces ***.** System speed (kt) -- two spaces ****.* Water depth by PDR (m) -- two spaces ***** Water depth by Seabeam (m) C/R carriage return *** Wind direction (degreeT) - space **.* Wind speed (m/s) - space ?**.* Air temperature (+/- degreeC) - space ?**.* Dew point temperature (+/- degreeC) - space ?**.* Sea surface temperature (+/- degreeC) - space ?**.** Water temperature at the conductivity sensor (+/- degreeC) - space ***.* Precipitation (mm/h) - space ****.* Air pressure (hpascal) - space *.** Short wave radiation (kW/m**2) - space *.** All wave radiation (kW/m**2) - space ?**.* Temperature of radiometer sensor (+/- degreeC) - space **.** Conductivity of sea surface water (mmho) - space 0000 spare channel ---------------------------------------------------------------------- No data is expressed by '>'. 3. Sample of a dataset and a fortran program to read it ---------------------------------------------------------------------- 950517 000904 N27 59.0104 E135 37.2786 147.2 000.74 5609.8 00000 264 04.3 +21.4 +16.3 +22.1 +24.79 000.0 1014.4 0.27 +0.25 +38.9 54.92 0000 ---------------------------------------------------------------------- ---------------------------------------------------------------------- PROGRAM REDMET C INTEGER YEAR, MONTH, DAY, HOUR, MIN, SEC REAL LATDEG, LATMIN, LONDEG, LONMIN REAL SYSHED, SYSSPD, DEPPDR, DEPSBM REAL WINDIR, WINSPD, AIRTMP, DEWTMP, SEATMP, CTDTMP REAL PRECIP, AIRPRS, SWVRAD, AWVRAD, RDMTMP, CTDCON CHARACTER*1 LATNS, LONEW C 1000 CONTINUE READ(5, 9000, END=2000) * YEAR, MONTH, DAY, HOUR, MIN, SEC, * LATNS, LATDEG, LATMIN, LONEW, LONDEG, LONMIN, * SYSHED, SYSSPD, DEPPDR, DEPSBM, * WINDIR, WINSPD, AIRTMP, DEWTMP, SEATMP, CTDTMP, * PRECIP, AIRPRS, SWVRAD, AWVRAD, RDMTMP, CTDCON GO TO 1000 9000 FORMAT(3I2,1X,3I2,2X,A1,F2.0,1X,F7.4,2X,A1,F3.0,1X,F7.4/ * F5.1,2X,F6.2,2X,F6.1,2X,I5/ * F3.0,1X,F4.1,1X,F5.1,1X,F5.1,1X,F5.1,1X,F6.2,1X, * F5.1,1X,F6.1,1X,F4.2,1X,F5.2,1X,F5.1,1X,F5.2:) 2000 STOP END ---------------------------------------------------------------------- 4. Reference Otobe H. and K. Nakamura, "Routine surface meteorological data", 1993 Ocean Research Institute, Preliminary Report of The Hakuho Maru Cruise KH-92-5 (TOGA/COARE Cruise), PP.89-111. ----- P13C