2024’s Extreme Ocean Temperature Breaks Records Again, Leaving Scientists Puzzled by Heat Acceleration

Narragansett Town Beach.
The global ocean’s surface temperature was still well above average going into 2025.
Dewey Raposo
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Narragansett Town Beach.
The global ocean’s surface temperature was still well above average going into 2025.
Dewey Raposo
2024’s Extreme Ocean Temperature Breaks Records Again, Leaving Scientists Puzzled by Heat Acceleration
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The oceans are heating up as the planet warms.

This past year, 2024, was the warmest ever measured for the global ocean, following a record-breaking 2023. In fact, every decade since 1984, when satellite recordkeeping of ocean temperatures started, has been warmer than the previous one.

A warmer ocean means increased evaporation, which in turn results in heavier rains in some areas and droughts in others. It can power hurricanes and downpours. It can also harm the health of coastal marine areas and sea life – coral reefs suffered their most extensive bleaching event on record in 2024, with damage in many parts of the world.

Warming ocean water also affects temperatures on land by changing weather patterns. The EU’s Copernicus Climate Change Service announced on Jan. 10 that data showed 2024 had also broken the record for the warmest year globally, with global temperatures about 2.9 degrees Fahrenheit (1.6 Celsius) above pre-industrial times. That would mark the first full calendar year with average warming above 1.5 C, a level countries had agreed to try to avoid passing long-term.

Climate change, by and large, takes the blame. Greenhouse gases released into the atmosphere trap heat and about 90% of the excess heat caused by emissions from burning fossil fuels and other human activities is absorbed by the ocean.

But while it’s clear that the ocean has been warming for quite some time, its temperatures over the past two years have been far above the previous decades.

Scientists are puzzled and left with two problems to solve. They must figure out whether something else contributed to the unexpected warming and whether the past two years have been a sign of a sudden acceleration in global warming.

Read the full article on The Conversation.

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