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Article

Sea Surface Salinity Seasonal Variability in the Tropics from Satellites, Gridded In Situ Products and Mooring Observations

1
Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC 28403-5928, USA
2
Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2021, 13(1), 110; https://doi.org/10.3390/rs13010110
Received: 30 November 2020 / Revised: 24 December 2020 / Accepted: 29 December 2020 / Published: 31 December 2020
(This article belongs to the Special Issue Moving Forward on Remote Sensing of Sea Surface Salinity)
Satellite observations of sea surface salinity (SSS) have been validated in a number of instances using different forms of in situ data, including Argo floats, moorings and gridded in situ products. Since one of the most energetic time scales of variability of SSS is seasonal, it is important to know if satellites and gridded in situ products are observing the seasonal variability correctly. In this study we validate the seasonal SSS from satellite and gridded in situ products using observations from moorings in the global tropical moored buoy array. We utilize six different satellite products, and two different gridded in situ products. For each product we have computed seasonal harmonics, including amplitude, phase and fraction of variance (R2). These quantities are mapped for each product and for the moorings. We also do comparisons of amplitude, phase and R2 between moorings and all the satellite and gridded in situ products. Taking the mooring observations as ground truth, we find general good agreement between them and the satellite and gridded in situ products, with near zero bias in phase and amplitude and small root mean square differences. Tables are presented with these quantities for each product quantifying the degree of agreement. View Full-Text
Keywords: sea surface salinity; seasonal variability; satellite validation; harmonic analysis; mooring observations sea surface salinity; seasonal variability; satellite validation; harmonic analysis; mooring observations
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MDPI and ACS Style

Bingham, F.M.; Brodnitz, S.; Yu, L. Sea Surface Salinity Seasonal Variability in the Tropics from Satellites, Gridded In Situ Products and Mooring Observations. Remote Sens. 2021, 13, 110. https://doi.org/10.3390/rs13010110

AMA Style

Bingham FM, Brodnitz S, Yu L. Sea Surface Salinity Seasonal Variability in the Tropics from Satellites, Gridded In Situ Products and Mooring Observations. Remote Sensing. 2021; 13(1):110. https://doi.org/10.3390/rs13010110

Chicago/Turabian Style

Bingham, Frederick M., Susannah Brodnitz, and Lisan Yu. 2021. "Sea Surface Salinity Seasonal Variability in the Tropics from Satellites, Gridded In Situ Products and Mooring Observations" Remote Sensing 13, no. 1: 110. https://doi.org/10.3390/rs13010110

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