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Mean Sea Level Trend
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The plot shows the monthly mean sea level without the regular seasonal fluctuations due to coastal ocean temperatures, salinities, winds, atmospheric pressures, and ocean currents. The long-term linear trend is also shown, including its 95% confidence interval. The plotted values are relative to the Revised Local Reference (RLR) datum as established by the Permanent Service for Mean Sea Level (PSMSL). The calculated trends for all GLOSS-LTT stations are available as a table in millimeters/year
or a table in feet/century (0.3 meters = 1 foot).
If present, solid vertical lines indicate times of any major earthquakes in the vicinity of the station and dashed vertical lines bracket any periods of questionable data.
Average seasonal cycle |
Interannual variation for all data |
Interannual variation since 1980 |
Variation of 50-year mean sea level trends |