Ocean temperatures hit record high, scientists warn of climate change and El Niño impact

Oceans have hit a record high average surface temperature of 21.1°C, surpassing the previous mark set in early 2024. This alarming milestone is occurring as the El Niño weather pattern adds heat to the global system, compounding decades of human-induced warming.

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El Niño is adding heat to the system, but it does so on top of decades of human-caused warming.

Dr. Samantha Burgess, deputy director of Copernicus, stated, "El Niño is adding heat to the system, but it does so on top of decades of human-caused warming." She added, "This record is another clear signal that the ocean is under increasing stress." The implications of warming seas are profound, potentially leading to more severe weather events, rising sea levels, and significant disruption to marine ecosystems.

Scientists measure sea temperatures using buoys, ships, and satellites, taking readings up to 10 meters below the surface for a global estimate. While not an exact science, the current temperatures are concerning, especially as El Niño has not yet reached its peak. Dr. Jeremy Grist, a senior researcher at the National Oceanography Centre, noted, "The fact that we are already breaking records is an early indicator of how strong El Niño is becoming." He suggested that if current trends continue, the oceanic temperature record could be broken again by March or April 2027.

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This record is another clear signal that the ocean is under increasing stress.

The warming oceans are a stark indicator of accelerating climate change driven by human activity. Oceans absorb over 90% of the excess heat trapped by greenhouse gas emissions, primarily from burning fossil fuels. This absorption helps regulate global temperatures but places immense strain on marine environments.

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The fact that we are already breaking records is an early indicator of how strong El Niño is becoming.