WELCOME TO THE "SOUTHERN OCEAN GEOPHYSICAL DATA CD-ROM"

* Produced by:

United States Department of Commerce,
National Oceanic and Atmospheric Administration,
National Environmental Satellite, Data, and Information Service,
National Geophysical Data Center,
Marine Geology and Geophysics Division

* Comments and questions to:

MGG Division, Code E/GC3
NOAA-NGDC
325 Broadway
Boulder, Colorado 80305

  Phone:
  (303) 497-6826 [voice]
  (303) 497-6513 [Fax]
  EMail:
   ngdc.info@noaa.gov 


* Purpose of the Disc:

This "SOUTHERN OCEAN GEOPHYSICAL DATA CD-ROM" disc contains a 
collection of new and previously released geophysical data for 
the Southern Ocean (south of 30 South).  It is intended as a 
resource for anyone interested in the geodynamics of the 
Southern Ocean.  The data are recorded on this disc in their 
original format where appropriate, and in a format accessible 
for many types of desktop personal computers and workstations.  
Some programming may be required to access some of the data.


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*	TOPOGRAPHY DATA ARE NOT TO BE USED FOR NAVIGATION     *
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*
* General Contents:
*

This disc contains several digital gridded data bases including: 
predicted sea floor topography, free air gravity derived from 
Geosat altimetry, and total sediment thickness.

* Major Divisions of this CD-ROM:


     Topo:
          Predicted Sea Floor Topography generated by 
          Walter Smith and David Sandwell.  There is both 
          a GMT binary grid file as well as a two-byte signed 
          integer values in the Sun byte order (twos-complement, 
          big-endian, or most significant byte).
first) ordered
          binary file.
     Gravity:
          Free Air Gravity derived from Geosat Altimetry generated 
          by David Sandwell and Walter Smith.  There is both 
          a GMT binary grid file as well as a Sun byte ordered
          binary file.
     Sedthick:
          Total Sediment Thickness data compiled at NGDC.
          There is both a GMT binary grid file as well as a 
          Sun byte ordered binary file.
     Magnetic:
          Digital Sea Floor Spreading Lineations, digitized 
          magnetic lineations and fracture zone traces from 
          Cande et al. [1989].  Digitized and contributed by 
          Greg Cole of Los Alamos National Laboratory.
     Atlas:
          A collection of ancillary geophysical data for the 
          region.  Data types include: heat flow, sonobuoy, 
          navigation, earthquake, and volcano digital data files 
          previously published in Marine Geological and Geophysical 
          Atlas of the Circum-Antarctic to 30S, edited by D.E. Hayes, 
          p.56, Antarctic Research series, v. 54, AGU, Washington, 
          DC., 1991.  Contributed by Dennis Hayes of Lamont-
          Doherty Earth Observatory