PHC 2.1 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 (June, July, August)
    January to December
    Spatial
    Distribution
    Global
    1X1 degree intervals
    Global
    1X1 degree intervals
    Global
    1X1 degree intervals


  • DOWNLOAD PHC 2.1 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
    (.tar format)

    Product III
    Monthly Fields:

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

    Download All
    (.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
    'p2.1' PHC 2.1
    File Name
    EXAMPLES:
    Winter Temperature = Temp13_p2.1.obj
    December Salinity = Salt12_p2.1.obj
    Additional Information
    The .tar files will be in zipped format once they are un-tarred (as will be indicated by the .gz appendage). If you download the files individually, they will not be zipped.

    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?)


  • 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 2.1. It's quite friendly.
    ReadPHC.pro
    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 2.1 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 2.1, 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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