Seasonal cycle in sea level across the coastal zone

Data supplement for manuscript "Seasonal cycle in sea level across the coastal zone" by Rui Ponte, Michael Schindelegger, submitted to Earth and Space Science, 2024.

Content:

This repository contains amplitude and phase estimates for the mean annual (Sa) and semiannual (Ssa) oscillations in sea level, as observed by satellite altimetry and tide gauges. We also provide related determinations of Sa/Ssa in manometric sea level, steric sea level, and in several secondary phenomena that are typically considered as corrections to altimetric sea levels or tide gauge observations (e.g., inverted barometer effect, vertical land motion):

• altimetric.tar.gz: Sa/Ssa in gridded DUACS and MEaSUREs altimetry, and the regional X-TRACK-L2P along-track product (10.24400/527896/a01-2022.020); all standard altimetry corrections have been applied to these data.
• tgauges_harmonics.dat: Sa/Ssa estimates at 747 globally distributed tide gauges from the GESLA-3 database (https://gesla787883612.wordpress.com/). The harmonics are not corrected for the inverted barometer effect.
• manometric_steric.tar.gz: Gridded Sa/Ssa estimates in manometric sea level, derived from GSFC GRACE 1° mascons, and steric sea level, as deduced from a hydrographic atlas (WOA2023).
• corrections.tar.gz: Sa/Ssa contributions to the oceanic inverted barometer, the astronomical tides, and vertical land motion, along with an estimate for the annual pole tide signal.

The respective files contain a few more relevant specifications such as data sources, underlying grids, and time periods considered for the analysis.

Important notes:

• Phases are referred to the vernal equinox, and NOT the beginning of the calendar year. See Ray et al. (2021) for a pertinent discussion.
• Amplitudes of the corrective fields are in (mm), all other amplitudes are in (cm).

Terms of usage:

• If you use the DUACS or MEaSUREs seasonal cycle estimates or the corrective fields, please cite: Ray, R.D., Loomis, B.D. & Zlotnicki, V. (2021). The mean seasonal cycle in relative sea level from satellite altimetry and gravimetry. Journal of Geodesy, 95, 80. https://doi.org/10.1007/s00190-021-01529-1.
• If you use any of the other datasets (i.e., seasonal cycle in X-TRACK, tide gauges, manometric and steric sea level), please cite: Ponte, R.M. & Schindelegger, M. (2024). Seasonal cycle in sea level across the coastal zone. ESS Open Archive [preprint]. doi: 10.22541/essoar.172736425.52711759/v1.

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Contact: M. Schindelegger (schindelegger@igg.uni-bonn.de)