NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Mean Sea Level Trend
1770000 Pago Pago, American Samoa


The mean sea level trend is 2.07 millimeters/year with a 95% confidence
interval of +/- 0.90 mm/yr based on monthly mean sea level data from
1948 to 2006 which is equivalent to a change of 0.68 feet in 100 years.

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 most recent Mean Sea Level datum established by CO-OPS. The calculated trends for all stations are available as a table in millimeters/year and 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 or datum shift.


Products available at 1770000 Pago Pago, American Samoa

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services