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-- CU Sea Level Research Group University of Colorado Search this site: Global Mean Sea Level Regional Sea Level Trend Map Interactive Wizard Processing Tide Gauge Sea Level Steric Effects References FAQ Links Contact Global Mean Sea Level Regional Sea Level Trend Map Interactive Wizard Processing Monitoring Altimeter Drift Release Notes Tide Gauge Sea Level Steric Effects References FAQ Links Contact GMSL Rates CU: 3.4 ± 0.4 mm/yr AVISO: 3.3 ± 0.5 mm/yr CSIRO: 3.3 ± 0.4 mm/yr NASA GSFC: 3.4 ± 0.4 mm/yr NOAA: 3.2 ± 0.4 mm/yr (w/ GIA) Frequent Questions What is the format of the dates in the GMSL time series? What determines the x-intercept (i.e., "zero-crossing" or "base year") of the GMSL plots? Is sedimentation in the oceans accounted for in the GMSL estimate? How often are the global mean sea level estimates updated? What is glacial isostatic adjustment (GIA), and why do you correct for it? All FAQs Sea Level Links AVISO CLS Radar Altimetry Tutorial CSIRO GFZ GRACE Global Sea Level Observing System (GLOSS) JPL GRACE Tellus JPL Ocean Surface Topography LEGOS-CTOH NASA EO: World of Change NASA Global Climate Change NOAA Satellite Altimetry Permanent Service for Mean Sea Level (PSMSL) Radar Altimeter Database (RADS) USF Grace Ocean Mass UT/CSR GRACE Since 1993, measurements from the TOPEX and Jason series of satellite radar altimeters have allowed estimates of global mean sea level. These measurements are continuously monitored against a network of tide gauges. When seasonal variations are subtracted, they allow estimation of the global mean sea level rate. As new data, models and corrections become available, we continuously revise these estimates (about every two months) to improve their quality. 2018_rel1: Global Mean Sea Level Time Series (seasonal signals removed) Edited: 2018-02-12 Share Data Raw data (ASCII) | PDF | EPS Similar plots Global Mean Sea Level Time Series (seasonal signals retained) Release Notes 2018 Release 1 (2018-02-11): Switched to RADS base data (see Processing Notes for details). Not applying the TOPEX cal-1 mode correction ( Beckley et al, 2017 ). Added Jason-3 GDR cycles 1-70. Instrument Drift Monitoring Citation Information Climate-change–driven accelerated sea-level rise detected in the altimeter era Edited: 2018-02-12 Share Tagged XML BibTex Google Scholar Nerem, R. S. , B. D. Beckley , J. T. Fasullo , B. Hamlington , D. Masters , and G. T. Mitchum . " Climate-change–driven accelerated sea-level rise detected in the altimeter era ." Proceedings of the National Academy of Sciences (2018). CU Sea Level Blog New group publication: "Is the detection of accelerated sea level rise imminent?" by Fasullo et al. 10 things you should know about sea level rise and how bad it could be Correction: New GMSL release and Jason-2 Switch to Side-B Platform Module more Our Publications Climate-change–driven accelerated sea-level rise detected in the altimeter era On the “Cal-Mode” Correction to TOPEX Satellite Altimetry and Its Effect on the Global Mean Sea Level Time Series Is the detection of accelerated sea level rise imminent? Uncovering an anthropogenic sea-level rise signal in the Pacific Ocean more Recent Articles Climate-change–driven accelerated sea-level rise detected in the altimeter era On the “Cal-Mode” Correction to TOPEX Satellite Altimetry and Its Effect on the Global Mean Sea Level Time Series Is the detection of accelerated sea level rise imminent? Some pitfalls of the semi-empirical method used to project sea level more Climate Science News [Jason-2] Happy birthday Jason-2 29 May - 17 June 2019 Press Review A glimpse on Swot satellite building and testing [SARAL/Altika] Cycle 128 GDR release June 2019: Modelling the flow more We would like to thank JPL and G. Kruizinga for providing the altimetry database software. This work was funded by the NASA under a OSTM/Jason science investigation. Colorado Center for Astrodynamics Research at the University of Colorado at Boulder...