Sea-level change refers to temporal variations in the height of the global or regional ocean surface relative to a reference datum, driven by combined effects of eustatic, isostatic, and steric processes. Eustatic change primarily arises from alterations in ocean mass, notably through glacial–interglacial ice-sheet dynamics and contemporary land ice melt. Isostatic and tectonic processes modify the vertical position of the solid Earth, producing relative sea-level change at specific locations. Steric contributions reflect temperature- and salinity-driven density changes that alter ocean volume. Quantifying sea-level change integrates tide-gauge records, satellite altimetry, gravimetry, and glacial isostatic adjustment models for reconstructing past variability and constraining projections.
When visiting Godrevy beach on the north Cornish coast, most people look out to sea at the lighthouse, surfers and seals rather than the cliffs behind. But these cliffs hold a history of past climate and sea levels that is ...
Earth Sciences
Jun 23, 2025
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Lenore Tedesco doesn't need to venture far to witness sea-level rise. She tracks its relentless advance from her window at work.
Earth Sciences
Jun 4, 2025
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Collapse of the West Antarctic Ice Sheet could be triggered by very little ocean warming above present-day, leading to a devastating four meters of global sea level rise to play out over hundreds of years, according to a ...
Earth Sciences
Jun 3, 2025
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New research led by the University of Sydney adds to our understanding of how rapidly rising sea levels due to climate change foreshadow the end of the Great Barrier Reef as we know it.
Earth Sciences
Jun 2, 2025
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Flooding in coastal communities is happening far more often than previously thought, according to a new study from North Carolina State University and the University of North Carolina at Chapel Hill. The study also found ...
Earth Sciences
Jun 2, 2025
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More than three-quarters of the world's glaciers are set to vanish if climate change continues unchecked, a major new study warned Thursday, fueling sea-level rise and jeopardizing water supplies for billions.
Environment
Jun 1, 2025
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As sea levels climb and weather grows more extreme, coastal regions everywhere are facing a creeping threat: salt.
Earth Sciences
May 23, 2025
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Efforts to limit the global temperature increase to 1.5°C under the Paris Climate Agreement may not go far enough to save the world's ice sheets, according to a study published in the journal Communications Earth & Environment.
Earth Sciences
May 20, 2025
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A team of geophysicists and atmospheric scientists at Princeton's NOAA/Geophysical Fluid Dynamics Laboratory and the University of Maryland Center for Environmental Science has found evidence that a warming planet over the ...
A new study of the 28 most populous U.S. cities finds that all are sinking to one degree or another. The cities include not just those on the coasts, where relative sea level is a concern, but many in the interior. Furthermore, ...
Earth Sciences
May 8, 2025
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