Ocean temperatures hit record high

The world's oceans have reached a new record high surface temperature, with 21.1 degrees Celsius measured on August 22. This surpasses the previous record of 21.09 degrees set in March 2024, marking a 0.01-degree increase over two years.

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In itself, it is not a big jump in the record, but if you look at the period, we are in a place where ocean temperatures are actually usually significantly lower.

While the increase may seem minor, climate researchers like Adrian Lema from the Danish Meteorological Institute (DMI) express concern. He notes that ocean temperatures are usually significantly lower during this time of year. The consistent rise in records, occurring more frequently than anticipated, is a direct consequence of global warming.

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Unfortunately, it is exactly as we expect. We are getting many more heat records, and we are getting them more frequently than we are used to.

This record is influenced by both long-term global warming and the natural El Niño weather phenomenon, which further elevates temperatures. Lema highlights that the record is particularly remarkable because it occurred in July and August, periods that typically see lower temperatures following the Australian summer. This suggests an extension of the marine heatwave season, placing marine ecosystems under prolonged stress.

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The most remarkable thing is that the temperature is record-high in July and August.

The consequences of these rising temperatures are far-reaching. Lema warns of potential shifts in marine species, with some disappearing and new ones arriving, impacting food security. Furthermore, he expresses concern that the ocean's capacity to absorb CO2 may diminish, potentially accelerating global warming. DMI anticipates further temperature increases in the coming months, possibly driven by the strongest El Niño ever recorded.

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In the longer term, we have to worry that the ocean loses its ability to naturally help us absorb CO2, which can further push global warming.