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If small glaciers and polar ice caps on the margins of Greenland and the Antarctic Peninsula melt, the projected rise in sea level will be around 0.5 m (1 ft 7.7 in). Melting of the Greenland ice sheet would produce 7.2 m (23.6 ft) of sea-level rise, and melting of the Antarctic ice sheet would produce 61.1 m (200.5 ft) of sea level rise. [7]
English: Bar chart showing NOAA's projection of sea level rise from 2020 to 2050 for the several coasts of the United States Data source: 2022 Sea Level Rise Technical Report. National Ocean Service, National Oceanic and Atmospheric Administration (NOAA) (February 2022). Archived from the original on November 29, 2022.
The melting of all the ice in West Antarctica would increase the total sea level rise to 4.3 m (14 ft 1 in). [119] However, mountain ice caps not in contact with water are less vulnerable than the majority of the ice sheet, which is located below the sea level. [120] Its collapse would cause ~3.3 m (10 ft 10 in) of sea level rise. [121]
The forecasts that sea levels along the U.S. shoreline will rise 10-12 inches (25-30cm) on average by 2050. Sea levels will tend to be higher along the Atlantic and Gulf shores, because of greater ...
Georeferenced map images are available from the USGS as digital raster graphics (DRGs) in addition to digital data sets based on USGS maps, notably digital line graphs (DLGs) and digital elevation models (DEMs). In 2015, the USGS unveiled the topoView website, a new way to view their entire digitized collection of over 178,000 maps from 1884 to ...
It superseded the National Geodetic Vertical Datum of 1929 (NGVD 29), [2] previously known as the Sea Level Datum of 1929. NAVD 88, along with North American Datum of 1983 (NAD 83), is set to be replaced in 2025 with a new geometric reference frame and geopotential datum, based on GPS and gravimetric geoid models.
Comparison of two sea level reconstructions during the last 500 Myr: Exxon curve and Hallam curve. The scale of change during the last glacial/interglacial transition is indicated with a black bar. The sea-level curve (also known as the eustatic curve) is the representation of the changes of the sea level relative to present day mean sea level ...
By 2050, California is expected to lose between 4.6 and 9 million acre-feet of its annual water supply. In other words, by 2050 at the latest, Californians would lose access to a volume of water ...