Mean Sea Level Trend
060-011 Oulu/Uleaborg, Finland

The mean sea level trend is -6.38 millimeters/year with a 95% confidence
interval of +/- 0.41 mm/yr based on monthly mean sea level data from
1889 to 2010 which is equivalent to a change of -2.09 feet in 100 years.

[Based on 1 reading per day for 1889-1921, 6 readings per day for 1922-1970]

Source Data & Additional Metadata

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 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 or datum shifts and dashed vertical lines bracket any periods of questionable data. Source data and additional metadata are noted below the plot.

Average seasonal cycle

Interannual variation for all data

Interannual variation since 1990