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the claim

Global mean sea level is currently rising by about 3 to 4 millimeters per year.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that global mean sea level is currently rising by about 3 to 4 millimeters per year?

Yes. A reference source states global mean sea level was rising about 3.2 mm per year as of 2018, and a satellite-altimetry analysis reports a steady 3.3 mm/yr, both within the claimed 3-4 mm/yr range. Peer-reviewed studies covering 1993-2007 and the altimetry era give 3.3-3.4 mm/yr, consistent but for earlier periods.

Verdict: SUPPORTED · 7 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 7
Global Mean Sea Level, Trajectory and Extrapolation
2025
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Willis, J., Hamlington, B., & Fournier, S. (2025). Global Mean Sea Level, Trajectory and Extrapolation. zenodo.org. https://doi.org/10.5281/zenodo.18649998

Evidence against · 1
Most probable origin and statistical attribution of global mean sea level anomaly and rising tides since the 20th century
2025
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Rivera, P. C. (2025). Most probable origin and statistical attribution of global mean sea level anomaly and rising tides since the 20th century. doi.org. https://doi.org/10.31219/osf.io/6hxsp_v23

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More for · 6
Global Mean Sea Level Projection Database 2026 Update
2026
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Andra, G. & Amy, A. (2026). Global Mean Sea Level Projection Database 2026 Update. zenodo.org. https://doi.org/10.5281/zenodo.21476934

Is coastal mean sea level rising faster than the global mean? A comparison between tide gauges and satellite altimetry over 1993-2007
2009
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Is coastal mean sea level rising faster than the global mean? A comparison between tide gauges and satellite altimetry over 1993-2007. (2009). hal.science. https://doi.org/10.1029/2008gl036564

Has sea level rise slowed down?
2019
Get citation
Has sea level rise slowed down?. (2019). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/44399/has-sea-level-rise-slowed-down

Sea level rise
Get citation
Sea level rise. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Sea_level_rise

Coastal Migration due to 21st Century Sea‐Level Rise
2021
Get citation
Coastal Migration due to 21st Century Sea‐Level Rise. (2021). hal.science. https://doi.org/10.1029/2020ef001965

Sea level and climate: measurements and causes of changes
2011
Get citation
Sea level and climate: measurements and causes of changes. (2011). hal.science. https://doi.org/10.1002/wcc.139

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