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.
As temperatures, biodiversity losses, and sea levels rise globally, scientists are concerned about the likelihood of abrupt climatic shifts occurring, particularly within sensitive subsystems of the climate system such as ...
Earth Sciences
Jul 22, 2025
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A total collapse of the roughly 80-mile-wide Thwaites Glacier, the widest in the world, would trigger changes that could lead to 11 feet of sea-level rise, according to scientists who study Antarctica. To better predict fractures ...
Earth Sciences
Jul 10, 2025
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Existing sea level rise models for coastal cities often overlook the impacts of rainfall on infrastructure. Researchers at the University of Hawai'i at Mānoa discovered that by 2050, large rain events combined with sea level ...
Earth Sciences
Jul 8, 2025
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Sea level on Earth has been rising and falling ever since there was water on the planet. Scientists were already able to use sediments and fossils to roughly reconstruct how sea levels changed over time steps of a million ...
Earth Sciences
Jul 7, 2025
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Research involving the University of Liverpool has discovered a trend of increasing surface meltwater in East Antarctica. In an ambitious new study, they produced the first Antarctic-wide, high-resolution monthly dataset ...
Earth Sciences
Jul 7, 2025
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Ice loss in Antarctica and its impact on the planet—sea level rise, changes to ocean currents and disturbance of wildlife and food webs—has been in the news a lot lately. All of these threats were likely on the minds of the ...
Environment
Jul 3, 2025
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30
On 28 November 1966, an American airplane flies over the Antarctic Peninsula just south of the southernmost tip of Chile. On board is a photographer, probably from the U.S. Navy, whose job is to map the Antarctic landscape. ...
Earth Sciences
Jul 2, 2025
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Scientists have discovered that changes in climate and water levels are reducing the ability of some ecosystems in the Everglades to sequester carbon, while the environmental shifts are enhancing the potential for carbon ...
Earth Sciences
Jun 30, 2025
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While satellites have revolutionized our ability to measure sea level with remarkable precision, their data becomes less reliable near coasts—where accurate information is most urgently needed.
Environment
Jun 25, 2025
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21
A new international research study has forecast the impacts of climate change on the world's coastal oceans to the end of the century.
Environment
Jun 23, 2025
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