Blended sea level anomaly fields with enhanced coastal coverage along the U.S. West Coast

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  • 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.
  • This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Nature Publishing Group. The published article can be found at: The dataset described by this publication is available in ScholarsArchive@OSU at: Metadata associated with this Data Descriptor is available at and is released under the CC0 waiver to maximize reuse
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  • Risien, C. M., & Strub, P. T. (2016). Blended sea level anomaly fields with enhanced coastal coverage along the U.S. West Coast. Scientific Data, 3,160013 doi:10.1038/sdata.2016.13
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  • 3
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  • Support for C.M.R. was provided by NOAA grant NA11NOS0120036. Support for P.T.S. was provided by NASA grant NNX13AH22G as part of the Ocean Surface Topography and NASA Sea Level Change Science Teams.
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