Blended sea level anomaly fields with enhanced coastal coverage along the US West Coast
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Blended sea level anomaly fields with enhanced coastal coverage along the US West Coast

Filetype[PDF-2.89 MB]


  • Journal Title:
    Scientific Data
  • NOAA Program & Office:
  • Description:
    We form a new 'blended' data set of sea level anomaly (SLA) fields by combining gridded daily fields derived from altimeter data with coastal tide gauge data. Within approximately 55-70 km of the coast, the altimeter data are discarded and replaced by a linear interpolation between the tide gauge and remaining offshore altimeter data. To create a common reference height for altimeter and tide gauge data, a 20-year mean is subtracted from each time series (from each tide gauge and altimeter grid point) before combining the data sets to form a blended mean sea level anomaly (SLA) data set. Daily mean fields are produced for the 22-year period 1 January 1993-31 December 2014. The primary validation compares geostrophic velocities calculated from the height fields and velocities measured at four moorings covering the north-south range of the new data set. The blended data set improves the alongshore (meridional) component of the currents, indicating an improvement in the cross-shelf gradient of the mean SLA data set.
  • Source:
    Scientific Data, 3 (130013)
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    CC BY
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