Sea Levels Online - Station Selection

sea level trends

Mean Sea Level Trends for Global Network Stations
The International Sea Level Workshop (June 10-11, 1997, Honolulu, Hawaii) identified a set of 62 water level stations as a core global network for monitoring long term sea level trends. CO-OPS operates and maintains 18 of these proposed climate reference stations and presents routinely-updated analyses of the long term trends and variability. In support of the program plan objectives of the Office of Climate Observations, a component of NOAA's Climate Program Office, the sea level trend analysis has been extended to the 44 non-CO-OPS water level stations. The data for these stations were obtained from the Permanent Service for Mean Sea Level (PSMSL), the global data bank for long term sea level information from tide gauges. The data sets analyzed are relative to the Revised Local Reference (RLR) datums as established by PSMSL (approximately 7 meters below mean sea level).
CO-OPS Data	PSMSL Data
Click on station of interest.	Click on station of interest.
Water level records are a combination of the fluctuations of the ocean and the vertical land motion at the location of the station. The sea level variations determined are the linear trend, the average seasonal cycle, and the interannual variability at each station. All the calculated trends are also available as a table in millimeters/year or feet/century.

Mean Sea Level Trends for Global Network Stations