| Indicator | Observations | Distributed by | Source |
|---|---|---|---|
| Global mean sea level | NASA satellite altimetry (TOPEX/Poseidon, Jason-1, OSTM/Jason-2, Jason-3, Sentinel-6 Michael Freilich) | NASA Earth Indicators chart data, full record at PO.DAAC (NASA_SSH_GMSL_INDICATOR) | Open ↗ |
| Greenland and Antarctic ice mass | GRACE and GRACE-FO, JPL RL06.3 mascons | NASA Earth Indicators chart data, time series at PO.DAAC | Open ↗ |
| Ocean mass | GRACE and GRACE-FO, JPL RL06.3 mascons | NASA Sea Level Change portal, time series at PO.DAAC (OCEAN_MASS_TELLUS_MASCON_CRI_TIME_SERIES) | Open ↗ |
| Steric height | Argo floats and in situ profiles, 0 to 2000 m | NOAA National Centers for Environmental Information | Open ↗ |
| Ocean heat content, full depth | ECCO ocean state estimate (all major ocean observing systems with an ocean model) | NASA Jet Propulsion Laboratory | Open ↗ |
| Ocean heat content | Argo floats, CTDs, XBTs and moorings, 0 to 2000 m | NOAA National Centers for Environmental Information | Open ↗ |
| Regional sea level trends | NASA-SSH Simple Gridded Sea Surface Height v1.1 (TOPEX/Poseidon, Jason-1, Jason-2, Jason-3, Sentinel-6 Michael Freilich), trends computed weekly on this site | NASA PO.DAAC | Open ↗ |
| Climate indices used for the acceleration map | NASA-SSH ENSO and PDO indicators | NASA PO.DAAC | Open ↗ |
| Global Sea Level Explorer | Tide gauges, satellite altimetry, sea level reconstruction (Dangendorf et al., 2024), high water reconstruction (Treu et al., 2023), IPCC AR6 projections | earth.gov Sea Level Explorer (NASA with partner agencies), copied monthly | Open ↗ |
| Tide gauge extensions, worldwide | Monthly mean sea level, revised local reference (RLR) | Permanent Service for Mean Sea Level (PSMSL) | Open ↗ |
| Sea level budget, mass sources | GRACE and GRACE-FO JPL RL06.3 mascons, summed over land regions on this site | NASA PO.DAAC (TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4) | Open ↗ |
| Reference rates | Published literature | Compiled by the NASA Sea Level Change Team | Open ↗ |
| AR6 projections | IPCC AR6 WG1 Chapter 9 | Zenodo, doi:10.5281/zenodo.5914709 | Open ↗ |
How the data stay current
Every time the site is built, a script retrieves the latest published values from the sources above and stores them as small JSON files in the /data folder. The site is rebuilt on a schedule, so the charts and every number quoted in the text follow the newest observations without manual edits. Each chart offers a data table and a CSV download that records the source and retrieval date.
Acknowledgments
Satellite altimetry, gravity and ocean observations are provided by NASA, NOAA, CNES, EUMETSAT, ESA, the German Research Centre for Geosciences (GFZ), the international Argo Program and the national programs that contribute to it. Sea level projections are from the IPCC Sixth Assessment Report.