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Global Sea Level Rise Accelerates, Doubling Projected Increase by 2050

Recent NASA data shows a significant spike in global sea level in 2023, attributed to El Niño and ongoing climate change, with rates of rise doubling since 1993.

Photo of Honolulu, Oaho, Hawaii, pictured from Diamond Head
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Overview

  • Global sea level rose by about 0.76 centimeters (0.3 inches) from 2022 to 2023, nearly four times the previous year's increase.
  • The rate of sea level rise has more than doubled from 0.18 centimeters (0.07 inches) per year in 1993 to 0.43 centimeters (0.17 inches) per year currently.
  • NASA projects an additional 20 centimeters (about 8 inches) increase in global mean sea level by 2050, doubling the change observed in the past century.
  • The immediate cause of the 2023 spike is attributed to a strong El Niño, which causes temporary increases in sea levels by altering rainfall patterns.
  • Long-term datasets and technological innovations in satellite observations have enhanced the accuracy of sea level measurements, distinguishing between short-term effects and underlying trends.