Sea level drop

Sea level drop refers to the phenomenon in which the shrinking weights of melting glaciers cause the surrounding land to rise and the relative sea level to fall.^[1][2]

Background

In Höfn, Iceland, the sea level is dropping relative to the land at a rate of about 1.7 cm (0.7 in) per year, and nearby it is dropping 3.8 cm (1.5 in) per year.^[3] The effect in Iceland is mainly caused by the Vatnajökull glacier. If the land rises enough, the Hornafjörður fjord would become impassable from ships, which would significantly hurt the town.^[4] Other countries experience this effect as well; in a portion of Alaska and Canada, the relative sea level is falling by up to 2.0 cm (0.8 in) a year. In Norway, Sweden and Finland, an effect called Fennoscandian land elevation causes the relative sea level to fall by up to 0.7 cm (0.3 in) a year.^[5][6]

See also

• Sea level rise
• Climate change in Iceland
• Post-glacial rebound

References

1. Naranjo, Laura (2013-10-11). "When Oceans Drop | Earthdata".
2. ClimateWire, Stephanie Paige Ogburn. "A Scientist Explains the Mystery of Recent Sea-Level Drop". Scientific American. Retrieved 2023-06-03.
3. Kottasová, Ivana; Doran, Temujin. "A drop in the ocean". www.cnn.com. Retrieved 2023-06-03.
4. Ástvaldsson, Jóhann Páll (2019-08-21). "Land Rising Due to Melting Glaciers". Iceland Review. Retrieved 2023-06-03.
5. "Land uplift". National Land Survey of Finland. Retrieved 2023-06-03.
6. "Where the land rises faster than the sea". correctiv.org. 2017-07-28. Retrieved 2023-06-03.