{"id":28494,"date":"2026-07-06T08:50:00","date_gmt":"2026-07-06T12:50:00","guid":{"rendered":"https:\/\/www.ecoportal.net\/en\/?p=28494"},"modified":"2026-07-05T05:11:05","modified_gmt":"2026-07-05T09:11:05","slug":"sensor-florida-bay-named-one-america","status":"publish","type":"post","link":"https:\/\/www.ecoportal.net\/en\/sensor-florida-bay-named-one-america\/28494\/","title":{"rendered":"A sensor in a Florida bay named for one of America’s most beloved water animals recorded 101 degrees, and the hidden reason scientists called it the most alarming reading of the summer"},"content":{"rendered":"

On a summer evening in July 2023, a monitoring buoy in a shallow Florida bay registered a number that scientists first assumed was a sensor glitch.<\/p>\n

It was not a glitch.<\/p>\n

The reading climbed past 100 degrees and kept going, settling at 101.1 degrees Fahrenheit<\/strong>, water as hot as a household hot tub, sitting inside a bay tucked between the southern tip of Miami-Dade County and Key Largo.<\/p>\n

The bay has a name most Americans would recognize in an instant, and what that name means for the story ahead<\/strong> is something almost no one was expecting.<\/p>\n

The number that stopped scientists mid-sentence<\/h2>\n

A water quality station in Manatee Bay in Everglades National Park measured a temperature of 101.1 degrees Fahrenheit at 6 p.m. at a depth of just 4.9 feet.<\/p>\n

At first, it was assumed the reading was a sensor error.<\/p>\n

But when those watching checked the neighboring buoys, they were stunned to find temperatures of 99.3 degrees<\/strong> at Murray Key and 98.4 degrees at Johnson Key.<\/p>\n

The numbers were real, and they were everywhere.<\/p>\n

Temperatures remained high even after sunset, with readings up to 99 degrees at 10 p.m.<\/p>\n

“These waters were some of the hottest ever recorded<\/strong> on Earth,” said NOAA hurricane scientist Dr. Jeff Masters.<\/p>\n

Scientists scrambled to make sense of what they were seeing, because the full consequences of water this warm reach far beyond a single buoy reading.<\/p>\n

Why shallow bays cook so fast<\/h2>\n

Manatee Bay is not the open Atlantic.<\/p>\n

The buoys inside Florida Bay sit in very shallow, murky, dark water, and because the water is contaminated with sediment, darker surfaces<\/strong> absorb more heat.<\/p>\n

Mud flats, mangroves, and submerged aquatic vegetation more readily absorb sunlight, which can account for the very high readings.<\/p>\n

Climatologists have attributed the warm waters to the El Ni\u00f1o climate pattern and an ongoing marine heat wave, with sea surface temperatures at least 2 degrees above average.<\/p>\n

Relative to temperatures recorded from 1991 to 2020, the waters surrounding South Florida were 5 to 7 degrees<\/strong> Fahrenheit above normal.<\/p>\n

A few degrees of difference in a shallow bay does not stay local for long, radiating outward through the seagrass beds, into the reef, and up through the food chain.<\/p>\n

What happens to a reef when the ocean becomes a hot tub<\/h2>\n

Florida’s coral reef is the largest in the continental United States.<\/p>\n

It stretches around 350 miles from the Dry Tortugas National Park to St. Lucie Inlet in Martin County.<\/p>\n

Unprecedentedly high ocean temperatures place corals at severe risk of bleaching, as heat stress causes coral hosts to expel the colorful microscopic photosynthetic algal cells from their tissues.<\/p>\n

Researchers diving at a coral reef restoration site off South Florida found 100% coral mortality<\/strong>.<\/p>\n

When coral is harmed by warm ocean temperatures, it can have a “cascading effect” on the other marine life that depends on it.<\/p>\n

But the creature the bay is named for has its own complicated relationship<\/strong> with warm water, one that makes this particular reading almost unbearably ironic.<\/p>\n

The animal that loves warm water, pushed past its limit<\/h2>\n

Manatees are famous for chasing warmth.<\/p>\n

Every winter, thousands of Florida manatees crowd around power plant outflows and natural springs, because water below 68 degrees Fahrenheit can kill them.<\/p>\n

The bay bearing their name was, for a long time, one of the richest seagrass habitats<\/a> in South Florida, and seagrass is what manatees eat, almost exclusively.<\/p>\n

Elevated temperatures can exacerbate coral bleaching, hypoxia, and other issues forecast to intensify with the progression of global warming.<\/p>\n

Hypoxia, low oxygen<\/strong> in the water, suffocates the seagrass beds that manatees depend on for every meal.<\/p>\n

“High temperatures over long periods of time can have a detrimental impact on the marine plants and animals,” said Allyson Gantt<\/a>, chief of communications and public affairs for Everglades and Dry Tortugas National Parks.<\/p>\n

The animal that needs warmth to live has now met a version of warmth that strips away<\/strong> its food, its shelter and its reef.<\/p>\n

A bay worth fighting for<\/h2>\n

“Without a structurally sound reef, southeast Florida can suffer ramifications immediately, as the first natural barrier to major wave movement from storms becomes less effective,” said Florida Sea Grant agent Ana Zangroniz.<\/p>\n

Coral restoration crews are already replanting and monitoring what remains.<\/p>\n

The good news is that temperatures can still decrease by as much as 10 degrees<\/strong> at night.<\/p>\n

Salinity levels in this area are also lower at this time of year than in many previous years, offering the ecosystem some small relief.<\/p>\n

Scientists note that the 101.1-degree reading came from an unusually shallow, sediment-rich location, and not every coastal habitat<\/a> is warming at the same rate.<\/p>\n

While the potentially record-breaking temperature was temporary, the current above-normal temperatures are part of ongoing unprecedented extremes, and scientists expect more records to fall as conditions continue to evolve.<\/p>\n

The manatee has survived ice ages, hunting and habitat loss.<\/p>\n

The bay named for it is now a living thermometer<\/strong>, and scientists are watching it more closely than ever, hopeful that the creature and the reef beneath it prove just as stubborn as their track record suggests.<\/p>\n","protected":false},"excerpt":{"rendered":"

On a summer evening in July 2023, a monitoring buoy in a shallow Florida bay registered a number that scientists first assumed was a sensor glitch. It was not a glitch. The reading climbed past 100 degrees and kept going, settling at 101.1 degrees Fahrenheit, water as hot as a household hot tub, sitting inside …