Rising Ocean Temperatures Leave Scientists Baffled


| LAST UPDATE 07/03/2023

By Stanley Wickens
ocean temperature warming mystery
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The world is heating up at an alarming rate, and the ocean temperatures are rising faster than they have in the last four decades. Scientists are sounding the alarm bells, but they cannot agree on what caused this rapid warming and how worried we should be.

Some speculate that air pollution reduction from ships has allowed sunlight to radiate into oceans, while others believe that a weakening of Atlantic winds may be encouraging warming. Regardless of the reasons behind it, scientists are concerned about the extreme heat waves, droughts, floods, and storms that all have links to ocean warming. The situation is so dire that even those who typically align on climate science disagree on what is happening. Tianle Yuan, a senior research scientist at the University of Maryland, Baltimore County, admits that “it's a possibility, however small” that the world has passed some climatic tipping point. But he also suggests that the record warmth could reflect a temporary fluctuation on top of the long-term warming trend caused by human-induced climate change. The recent spike in ocean temperatures has occurred after years of gradual and accelerating heating, and it is happening just as the El Niño pattern is developing. This pattern is known to supercharge global warming and extreme weather. As Michael Mann, a climatologist at the University of Pennsylvania, warns, “That means more record-breaking conditions and events are to be expected…underscoring reasons for concern and the urgency of climate action.”

ocean wildlife temperature impact
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The trend started in March, with its duration and intensity elevating scientists’ concerns significantly in recent days. The National Oceanic and Atmospheric Administration officially declared last week that the El Niño ocean-atmosphere pattern had come to fruition, with temperatures averaging across Earth’s oceans (excluding polar regions) surging two-tenths of a degree Celsius above observations at the same point last year. Some scientists believe that the reduction in air pollution from ships is causing the warming. Since 2020, the International Maritime Organization has required ships to use fuel with drastically reduced sulfur content to reduce sulfate air pollution that harms human health. Last year, researchers at the NASA Goddard Space Flight Center found that this change significantly reduced the concentration of those pollutants over parts of the northern Atlantic and Pacific. However, some scientists argue there is no data to support the theory that pollution reduction is to blame for the dramatic ocean warming.

Whatever the cause of this rapid warming, one thing is clear: we need to take immediate action to address climate change’s root causes. The consequences could be catastrophic if we don’t act quickly.

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