CU Sea Level Research Group

University of Colorado
  • Global Mean Sea Level
  • Regional Sea Level
  • Trend Map
  • Interactive Wizard
  • Processing
  • Tide Gauge Sea Level
  • Steric Effects
  • References
  • FAQ
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  • Contact
  • Global Mean Sea Level
  • Regional Sea Level
  • Trend Map
  • Interactive Wizard
  • Processing
    • Calibration
    • Release Notes
  • Tide Gauge Sea Level
  • Steric Effects
  • References
  • FAQ
  • Links
  • Contact

GMSL Rates

CU: 3.1 ± 0.4 mm/yr
AVISO: 3.2 ± 0.6 mm/yr
CSIRO: 3.1 ± 0.4 mm/yr
NOAA: 3.2 ± 0.4 mm/yr (w/ GIA)
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Frequent Questions

  • 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?
  • What is the definition of global mean sea level (GMSL) and its rate?
  • 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)
  • UT/CSR GRACE

CU Sea Level Library

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Sort by: Author Keyword Title Type [ Year  (Desc)]
Filters: Author is Johnson, G.  [Clear All Filters]
2012
Loeb, N., J. Lyman, G. Johnson, R. Allan, D. Doelling, T. Wong, B. Soden, and G. Stephens. "Observed changes in top-of-the-atmosphere radiation and upper-ocean heating consistent within uncertainty." Nature Geoscience (2012). Abstract
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2011
Purkey, S., and G. Johnson. "Warming of Global Abyssal and Deep Southern Ocean Waters between the 1990s and 2000s: Contributions to Global Heat and Sea Level Rise Budgets." J. Climate 23, no. 23 (2011): 6336. Abstract
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2010
Willis, J. K., J. Lyman, G. Johnson, and J. Gilson. "In Situ Data Biases and Recent Ocean Heat Content Variability." J. Atmos. Oceanic Technol. 26, no. 4 (2010): 846. Abstract
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Lyman, J., S. Good, V. Gouretski, M. Ishii, G. Johnson, M. Palmer, D. Smith, and J. K. Willis. "Robust warming of the global upper ocean." Nature 465, no. 7296 (2010): 334. Abstract
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CU Sea Level Blog

  • Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures
  • NASA mission takes stock of Earth's melting land ice
  • NASA Satellites Detect Pothole on Road to Higher Seas
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more

Our Publications

  • Reconstructing sea level using cyclostationary empirical orthogonal functions
  • Expected improvements in determining continental hydrology, ice mass variations, ocean bottom pressure signals, and earthquakes using two pairs of dedicated satellites for temporal gravity recovery
  • Evaluation of high-frequency oceanographic signal in GRACE data: Implications for de-aliasing
  • Recent changes in the Earth's oblateness driven by Greenland and Antarctic ice mass loss
more

Recent Sea Level Articles

  • Sea level variations at tropical Pacific islands since 1950
  • Twenty-first-century warming of a large Antarctic ice-shelf cavity by a redirected coastal current
  • 21st-Century Evolution of Greenland Outlet Glacier Velocities
  • World ocean heat content and thermosteric sea level change (0-2000), 1955-2010
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more

Climate Science News

  • NASA's new carbon-counting instrument leaves the nest
  • Pick of the pics
  • 'Monster' of climate research
  • Arctic sea ice reaches near-average extent in April
  • Flying high
more

AVISO Altimetry News

  • Jason-1: Start of Geodetic Phase
  • Envisat: End of mission
  • Envisat services interrupted
  • Envisat celebrates its 10th birthday
  • Keops2: Plankton blooms modeled
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