Sea Level Change: Datums and Terminology

Sea Level Change: Datums and Terminology

After completing this lesson, the learner should be able to do the following:

  • List the three types of vertical datums
  • Describe the reference surface for each vertical datum
  • Define the following terms:
    • Sea surface height
    • Ocean surface topography
    • Global mean sea level
    • Local mean sea level
    • Relative sea level
  • Recall the lateral extent of the different vertical datums
  • Recall the geopotential datums in use (in 2016)
  • Given a time series of water elevations at a tide gauge, identify the tide type
  • List the different tidal datums and provide an example of a common application of each one
  • Define tidal epoch and recall the national tidal datum epoch in 2016
  • Describe the conditions under which a tidal datum is updated more frequently
  • Describe the tidal datum information available