CU Sea Level Research Group

University of Colorado
  • Global Mean Sea Level
  • Regional Sea Level
  • Trend Map
  • Interactive Wizard
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  • Tide Gauge Sea Level
  • Steric Effects
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  • 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: 3.2 ± 0.4 mm/yr
AVISO: 3.2 ± 0.6 mm/yr
CSIRO: 3.2 ± 0.4 mm/yr
NOAA: 3.2 ± 0.4 mm/yr (w/ GIA)
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Frequent Questions

  • What is the format of the dates in the GMSL time series?
  • Do you account for plate tectonics in the global mean sea level trend?
  • Is sedimentation in the oceans accounted for in the GMSL estimate?
  • What determines the x-intercept (i.e., "zero-crossing" or "base year") of the GMSL plots?
  • Why is the GMSL different than local tide gauge measurements?
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

CU Sea Level Library

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Filters: Author is Callahan, P.  [Clear All Filters]
Journal Article
Zhao, C., C. K. Shum, Y. Yi, S. Ge, D. Bilitza, and P. Callahan. "Accuracy Assessment of the TOPEX/Poseidon Ionosphere Measurements." Marine Geodesy 27, no. 3 (2004): 729. Abstract
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Vincent, P., S. Desai, J. Dorandeu, M. Ablain, B. Soussi, P. Callahan, and B. J. Haines. "Jason-1 Geophysical Performance EvaluationSpecial Issue: Jason-1 Calibration/Validation." Marine Geodesy 26, no. 3 (2003): 167. Abstract
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Callahan, P., and E. Rodríguez. "Retracking of Jason-1 Data." Marine Geodesy 27, no. 3 (2004): 391. Abstract
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Beckley, B., N. P. Zelensky, S. B. Luthcke, and P. Callahan. "Towards a Seamless Transition from TOPEX/Poseidon to Jason-1." Marine Geodesy 27, no. 3 (2004): 373. Abstract
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CU Sea Level Blog

  • New GMSL release and Jason-2 Switch to Side-B
  • Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures
  • NASA mission takes stock of Earth's melting land ice
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Our Publications

  • The 2011 La Niña: So strong, the oceans fell
  • Is there a 60-year oscillation in global mean sea level?
  • Comparison of Global Mean Sea Level Time Series from TOPEX/Poseidon, Jason-1, and Jason-2
  • Reconstructing sea level using cyclostationary empirical orthogonal functions
more

Recent Sea Level Articles

  • Time-variable gravity observations of ice sheet mass balance: precision and limitations of the GRACE satellite data
  • Antarctic contribution to sea-level rise observed by GRACE with improved GIA correction
  • Satellite-derived interannual ocean bottom pressure variability and its relation to sea level
  • Future sea-level rise from Greenland’s main outlet glaciers in a warming climate
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Climate Science News

  • Strong swell in French Polynesia on June 2013
  • Saral also provides promising results over the Amazon river
  • Un-baked Alaska
  • April on average
  • Spring has sprung in the Arctic
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