Sea Levels Online - Station Selection

sea level trends

Mean Sea Level Trends for Global Network Stations
In Annex IV of the Global Sea Level Observing System (GLOSS) Implementation Plan 1997 (IOC Technical Series No. 50), a set of water level stations is identified as GLOSS-LTT (Long Term Trend) for monitoring long-term sea level trends. NOAA/CO-OPS operates and maintains 45 of these stations and presents routinely-updated analyses of the long-term trends and variability. In support of NOAA's Climate Program Office, the sea level trend analysis has been extended to 114 non-CO-OPS GLOSS-LTT water level stations. The data for these stations were obtained from the Permanent Service for Mean Sea Level (PSMSL), the data bank for sea level information from the global network of 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 a table in feet/century.

Mean Sea Level Trends for Global Network Stations