The PO.DAAC is pleased to announce the public release of the Global Mean Sea Level (GMSL) trend Version 5.1 dataset from the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Integrated Multi-Mission Ocean Altimeter Data for Climate Research project. More information about the GMSL dataset is available on the NASA Sea Level website.

The GMSL trend is a 1-dimensional time series of globally averaged Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1, OSTM/Jason-2, and Jason-3 altimeters that covers September 1992 to present with a latency of up to 4 months. The data are reported as variations relative to a 20-year TOPEX/Jason collinear mean. Bias adjustments and cross-calibrations were applied to ensure SSHA data are consistent across the missions; Glacial Isostatic Adjustment (GIA) was also applied. The data are available as a table in ASCII format.

Version 5.1 incorporates revisions to the orbit height corrections, ocean tide corrections (from a revised internal tide model), and a pole tide correction collectively used to integrate observations from TOPEX/Poseidon, Jason-1, Jason-2 (OSTM), and Jason-3. These changes are described in detail in section two of the user handbook.

This latest version of the GMSL trend produced by MEaSUREs is described and discoverable on the PO.DAAC data portal.

DOI: 10.5067/GMSLM-TJ151

Citation: Beckley, B.; Ray, R.; Zelensky, N.; Lemoine, F.; Yang, X.; Brown, S.; Desai, S.; Mitchum, G.. 2020. Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 5.1. PO.DAAC, CA, USA. https://doi.org/10.5067/GMSLM-TJ151.

Reference: Beckley, B.; Ray, R.; Zelensky, N.; Lemoine, F.; Yang, X.; Brown, S.; Desai, S.; Mitchum, G.. 2020. Integrated Multi-Mission Ocean Altimeter Data for Climate Research TOPEX/Poseidon, Jason-1, 2, & 3 User’s Handbook Version 5.1. PO.DAAC, CA, USA. https://doi.org/10.5067/ALTUG-TJ151.

Comments/Questions? Please contact podaac@podaac.jpl.nasa.gov or visit the PO.DAAC Forum.