Lab 2:  Geoid and Sediment Thickness


Data set Reference (their format, may not match ours) Web site Notes
ETOPO1  Amante, C., and Eakins, B.W., 2009, ETOPO1  1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis: NOAA Technical Memorandum NESDIS NGDC-24, 19 p.,   This has ocean bathymetry and land elevations

TOPEX MGB record for

  •  Cycle 356, started Julian day 134 of 2002.
  • Cycle 364, started Julian day 213 of 2002.
Jet Propulsion Laboratory, 2002, PO.DAAC merged geophysical data record from the TOPEX/Poseidon Mission Generation B Cycles 355, 356, 357: CD-ROM, POMGB_119_1. Converted by Prof Guth to a DBF file

This contains the altimeter data to compute the geoid anomaly.
Sediment thickness Whittaker, Joanne, Alexey Goncharov, Simon Williams, R. Dietmar Muller, German Leitchenkov (2013) Global sediment thickness dataset updated for the Australian-Antarctic Southern Ocean, Geochemistry, Geophysics, Geosystems. Volume 14, Issue 8, DOI: 10.1002/ggge.20181  
Sediment type distribution Adriana Dutkiewicz, R. Dietmar Muller, Simon O'Callaghan, and Hjortur Jonasson, 2015, Census of seafloor sediments in the world's ocean Geology, G36883.1,  doi:10.1130/G36883.1,  



  1. Review Labs introduction.
  2. Set Program version to geology
  3. File, Geology labs, Geoid and sediment thickness.  This will automatically open the global ETOPO1 data set and overlay the radar altimeter data from a single cycle of the Topex/Poseidon mission.  It also opens the Sediment thickness and the sediment type distribution grids.  If you want to open them manually, use:
  4. Review the Labs introduction for how to manipulate the maps.
  5. Geoid
  6. Sediment Thickness to open the sediment thickness.

Last revision 9/6/2015