Source explains: "Plots show monthly mean sea levels without the regular seasonal fluctuations from coastal ocean temperatures, salinity, wind, atmospheric pressure, and ocean currents. The relative sea level trend is also shown with its 95% confidence interval. Relative Sea Level trends at the coast can be positive or negative. A negative trend does not mean the ocean surface is falling; It indicates the land is rising more quickly than the ocean in a particular area. Trends close to zero indicate the land is rising at nearly the same rate as the ocean. ¶ Plotted values are relative to the most recent Mean Sea Level datum established by CO-OPS. Calculated trends are available as a table in millimeters/year and in feet/century (0.3 meters = 1 foot). If present, solid vertical lines indicate dates of any major earthquakes in the vicinity of the station. Dashed vertical lines bracket any periods of questionable data or a possible datum shift."
Values included in Version 1 (5 July 2025) are those for 1929 through 2024. Uploader did not include partial-data years 1928 and 2015.
Uploader adjusted vertical-axis values to rise from the lowest value, which was experienced in 1930.
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