PHC 3.0 Data Sets

  • Product Summary

    Product I:
    Annual Fields    		 Product II:
    Seasonal Fields    		 Product III:
    Monthly Fields
    Quantities
    Temperature & Salinity
    Temperature & Salinity
    Temperature & Salinity
    Available
    Depths

    (same as WOA)

    33 total:
    33 total:
    24 total:

    Time Period
    Annual Average
    Winter (March, April, May)
    Summer (July, August, September)
    January to December
    Spatial
    Distribution
    Global
    1X1 degree intervals
    Global
    1X1 degree intervals
    Global
    1X1 degree intervals

  • DOWNLOAD PHC 3.0 PRODUCTS

    • These files are structured and named to be analogous with the format of the World Ocean Atlas (Levitus) "analyzed" fields. The data are in ASCII format. Data points begin at -89.5 S and are arranged on a matrix which runs first over longitude, from .5 E to 359.5 E degrees, then over latitude, ending with 89.5 N (The data "spirals" up the world). This repeats for every depth. There are 10 entries per line, and there are 8 significant figures, 4 after the decimal point (10f8.4). The land value is -99. All of the depths for each field are included in each file. Each level has 64800 data values (that's one for every latitude and longitude coordinate: 360 X 180). Since there's 10 values per line, every 6480 lines of data in the files below constitute one level. For example, the first 6480 lines of data in the "Winter Temperature" file are the surface field. The next 6480 lines are the depth=10 meters field, and so on. Latitude and longitude files structured like these data files are included toward the bottom of this page under "Product Aides".

    INSTRUCTIONS: To download these files, RIGHT CLICK on the desired link, and choose the appropriate option.

    DOWNLOAD DATA (ASCII)
    TEMPERATURESALINITY
    Product I
    Annual Fields:

    ANNUAL

    		 Product I
    Annual Fields:

    ANNUAL
    Product II
    Seasonal Fields:

    WINTER
    SUMMER

    		 Product II
    Seasonal Fields:

    WINTER
    SUMMER
    Product III
    Monthly Fields:

    JANMAY SEP
    FEB JUN OCT
    MAR JUL NOV
    APR AUG DEC

    Download All
    Temp Months
    (.tar format)

    		 Product III
    Monthly Fields:

    JAN MAY SEP
    FEB JUN OCT
    MAR JUL NOV
    APR AUG DEC

    Download All
    Salt Months
    (.tar format)
    DOWNLOAD ALL DATA
    (.tar format)
    File Naming Convention
    The name of each downloaded file contains 3 pieces of information:
    [temperature or salinity][time period].[PHC version].obj
    'Temp'Temperature
    'Salt'Salinity
    '00'annual
    '01'-'12'
    jan to dec
    '13'winter
    '15' summer
    'p3' PHC 3.0
    File Name
    EXAMPLES:
    Winter Temperature = Temp13_p3.obj
    December Salinity = Salt12_p3.obj
    Additional Information
    FILE SIZES

    • Seasonal and Annual fields are each 3.3MB gzipped files, and are 16.5MB when unzipped.
    • The individual monthly fields are each 2.7MB gzipped, and 12MB when unzipped.
    • The monthly .tar files are 32.8MB each, and contain 12 zipped files for a total of 144MB when unpacked and unzipped.
    • The .tar file containing all the data is 79.3MB. When unpacked and unzipped the data occupies 390MB.

    HOW TO UN-TAR FILES
    • UNIX users can un-tar files using the "tar xvf data.tar" command, and then unzip them with "gunzip data.gz"

    • MAC users can un-tar files using "Tar", a mac program for handling UNIX tar files, available online (free)

    • Windows users can un-tar files with "winZip", also available online (free?)

    DOWNLOAD DATA (NetCDF)
    Temperature and Salinity are both contained in each file below.

    ANNUAL
    SEASONAL
    MONTHLY

  • PRODUCT AIDES

    For those unfamiliar with the NODC format, here is an example FORTRAN program that reads Levitus Analyzed fields (the same format as our PHC product)
    get_anlz.f
    Here's an IDL program that does the same, but is customized for PHC 3.0. It's quite friendly.
    ReadPHC.pro
    A wonderful PHC user contributed this matlab program for reading PHC data.
    Please address any questions to the creator: Brita Irving
    ReadPHCdata.m
    For those who want land-filled data files that are still formatted the same, here is a FORTRAN program that fills the in -99 land values using a poisson solver. The function (fill_land.f) is taken directly from the 2MOM2.f program.
    This program was slightly modified 3/1/04 to make it more PHC 3.0 compatible. Better instructions for making this program work were also added to the beginning comments of the program.
    fill_land.f
    Here are the suface latitude and longitude coordinates structured exactly the same as the data files. There are 6480 lines in each file, cooresponding to the first 6480 lines in each data file above (the global surface). This information repeats for each depth. (i.e. the second 6480 lines of data is depth = 10m, with the same latitude and longitude coordinates). Latitudes.dat
    Longitudes.dat

    Questions or comments? Please contact:
    wermold@apl.washington.edu
     or
    mas@apl.washington.edu
    We thank you for your interest in our database, which may be cited as:
    PHC 3.0, updated from:
    Steele, M., R. Morley, and W. Ermold, PHC: A global
    ocean hydrography with a high quality Arctic Ocean,
    J. Climate, 14, 2079-2087, 2001.

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