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Description

This dataset contains the Global Mean Sea Level (GMSL) trend generated from the Integrated Multi-Mission Ocean Altimeter Data for Climate Research ( http://podaac.jpl.nasa.gov/dataset/MERGED_TP_J1_OSTM_OST_ALL_V42 ). The GMSL 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. It starts in September 1992 to present, with a lag 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. However this product does not use the TOPEX internal calibration-mode range correction. This is the main difference between version 4 and version 4.2. More information on this calibration can be found at Beckley et al. 2017 DOI 10.1002/2017JC013090. These data are available in ASCII format.

Product Summary

Platforms
OSTM/JASON-2 ,
JASON-1 ,
TOPEX/POSEIDON ,
JASON-3
Instruments
AMR ,
POSEIDON-3 ,
JASON-1 Microwave Radiometer ,
POSEIDON-2 ,
TMR ,
ALT (TOPEX) ,
SSALT ,
POSEIDON-3B
Projects
MEaSUREs
Spatial Extent

N: 66 S: -66 E: 180 W: -180

Spatial Resolution
360 Decimal Degrees x 132 Decimal Degrees
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1992-09-25 to 2020-01-25
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2631958335-POCLOUD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
4
Published
Updated
Science Keywords
Sea Surface Height

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

GSFC. (2016). Global Mean Sea Level Trend from Integrated Multi-Mission Ocean Altimeters TOPEX/Poseidon Jason-1 and OSTM/Jason-2 Version 4.2 [Dataset]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GMSLM-TJ142 Date Accessed: 2026-10-08

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