What is GLOSS?
The Global Sea Level Observing System (GLOSS) was established in 1985, starting with a proposed network of about 250 stations. Its primary aim was to collect long-term tide gauge observations, develop systems and standards for "ocean monitoring and flood warning purposes," and to support the activities of the Permanent Service for Mean Sea Level (PSMSL).
At the NOC we are deeply involved in this global effort. Here at NOC, the British Oceanographic Data Centre (BODC) and PSMSL jointly act as a GLOSS Data Archive. We provide services, data, and advice to the international sea level community. Furthermore, NOC staff sit on the GLOSS steering committee and are active members of its group of experts.
One of our special interests within GLOSS is sea level data rescue. This involves publishing advice, organizing workshops, and carrying out dedicated projects to retrieve and preserve historical data that might otherwise be lost.
The Evolution of GLOSS
GLOSS has grown significantly since its launch. Today, more than 1,000 stations report in near real-time, and the use of this data has expanded dramatically.
This data is now required across many different timescales:
- Within several minutes: To monitor tsunamis and storm surges, and for use in daily port operations and hydrography.
- Within hours: To validate ocean circulation, tidal, and storm surge models.
- Within days: To help validate satellite altimeters.
- Annually: To provide high-quality, controlled data for climate studies.
GLOSS's Role in Global Ocean Observing
GLOSS is one of the biggest and oldest components of the Global Ocean Observing System (GOOS). It's a truly global collaboration, with 65 countries involved in transmitting fast-delivery data to the GLOSS network
Get the Data
You can learn more through these key organizations and programs:
- GLOSS Sea Level
- Permanent Service for Mean Sea Level
- IOC Sea Level Monitoring
- University of Hawaii Sea Level Center
- SONEL
- Global Ocean Observing System
Want to learn more about global sea level data or access GLOSS archives? Explore the resources above or connect with BODC and PSMSL to discover how international collaboration supports sea level monitoring worldwide.