NASA warns scientists about rapid acceleration of ocean changes: 'Speeding up'

Scientists have been startled by an unexpected jump in global sea levels last year. According to a study led by NASA, the increase exceeded previous forecasts. The rise was driven by both unusually high ocean warming and melting ice from land sources.

In 2024, sea levels climbed at a rate of 0.23 inches per year, surpassing the anticipated 0.17 inches. "The rise we observed in 2024 exceeded our expectations," stated Josh Willis, a sea level expert at NASA's Jet Propulsion Laboratory. "While each year varies, the trend is clear: oceans are rising faster and faster."

The main factor behind this surge was the thermal expansion of seawater as it warms. Traditionally, about two-thirds of sea level increase came from melting ice on land, with the remaining third from thermal expansion. In 2024, this pattern reversed, with thermal expansion contributing to two-thirds of the rise.

Why This Matters

The average annual increase in sea levels has more than doubled since NASA began satellite monitoring in 1993, totaling a 4-inch rise globally. Coastal areas are already feeling the effects. Officials in Northern California report noticeable changes, while a Central American Indigenous community faces potential relocation due to flooding risks on their island.

The National Oceanic and Atmospheric Administration warns that rising seas will intensify storm surges along coastlines. Higher baseline water levels mean that destructive storms, such as those comparable to Hurricane Katrina and Superstorm Sandy, will penetrate further inland. Additionally, frequent high-tide flooding, sometimes called nuisance flooding, will become more common, disrupting daily life and increasing costs.

Addressing the Issue

Raising awareness about the effects of rising seas is crucial. Discussing climate challenges with friends and family can highlight the importance of addressing global warming. Supporting political leaders committed to environmental protection is another way to help mitigate the risks associated with rising sea levels.

Author: Sophia Brooks