Satellites in Space Spot Largest Seaweed Bloom on Earth (2024)

Satellites in Space Spot Largest Seaweed Bloom on Earth (1)

NASA's Earth observation satellites have spotted the largest seaweed bloom in the world, a belt of algae stretching 5,500 miles (8,850 kilometers) from West Africa to the Gulf of Mexico.

The brown algae, referred to as the Great Atlantic Sargassum Belt, have been floating on the surface of the tropical Atlantic Ocean for the past eight years. In 2018, more than 20 million tons of the algae were spread out along the shorelines of the tropical Atlantic Ocean, Caribbean Sea, Gulf of Mexico and east coast of Florida.

"The scale of these blooms is truly enormous, making global satellite imagery a good tool for detecting and tracking their dynamics through time," Woody Turner, manager of the Ecological Forecasting Program at NASA headquarters in Washington, said in a statement.

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Researchers from the College of Marine Science at the University of South Florida (USF) in St. Petersburg used satellite observations between the years 2000 to 2018 to study the seaweed bloom in hopes of figuring out what may be causing it.

The data gathered from an instrument called the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Terra and Aqua satellites indicated a shift in the year 2011, when it appeared in places it had not been before, suggesting that the bloom forms in response to changing ocean currents, according to the statement.

"The ocean’s chemistry must have changed in order for the blooms to get so out of hand," Chuanmin Hu, an oceanographer with the USF College of Marine Science and lead author of the study, said in the statement.

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Under normal circ*mstances, Sargassum contributes to a healthy marine life by providing habitat for fish, turtles, crabs and even birds. However, too much of this seaweed can have a smothering effect on these marine animals, according to the study.

"This is all ultimately related to climate change, as climate affects precipitation and ocean circulation and even human activities" that can lead to Sargassum blooms, Hu said. "They are probably here to stay."

The study was published in the journal Science on July 5.

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Passant Rabie is an award-winning journalist from Cairo, Egypt. Rabie moved to New York to pursue a master's degree in science journalism at New York University. She developed a strong passion for all things space, and guiding readers through the mysteries of the local universe. Rabie covers ongoing missions to distant planets and beyond, and breaks down recent discoveries in the world of astrophysics and the latest in ongoing space news. Prior to moving to New York, she spent years writing for independent media outlets across the Middle East and aims to produce accurate coverage of science stories within a regional context.

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Satellites in Space Spot Largest Seaweed Bloom on Earth (2024)

FAQs

Satellites in Space Spot Largest Seaweed Bloom on Earth? ›

The brown algae

brown algae
Brown algae ( sg. : alga) are a large group of multicellular algae comprising the class Phaeophyceae. They include many seaweeds located in colder waters of the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions.
https://en.wikipedia.org › wiki › Brown_algae
stretch from West Africa to the Gulf of Mexico. NASA's Earth observation satellites have spotted the largest seaweed bloom in the world, a belt of algae stretching 5,500 miles (8,850 kilometers) from West Africa to the Gulf of Mexico.

What is the largest seaweed in the world? ›

Giant bladder kelp (M. pyrifera) is the largest alga species, measuring up to 65 metres (215 feet) long, and is thought to have the fastest linear growth rate of any organism on Earth.

What is causing the blooms of Sargassum? ›

Much of that was converted for agricultural uses, which means more fertilizer and other nutrients. "The Amazon River, which is the largest river in the world, is now bringing all these nutrients, phosphates and nitrates to the coast, which feeds the sargassum which is right offshore. And it blooms.

Where is the Great Atlantic Sargassum Belt today? ›

The Great Atlantic Sargassum Belt stretches 5,000 miles from West Africa to the Gulf of Mexico.

Can I eat dried seaweed every day? ›

Dried seaweed is very good for health, but not so that we use this food excessively. To minimize the possible side effects when using dried seaweed, you should use about 100 grams of seaweed per day.

Can humans eat all seaweed? ›

Some marine algae contain acids that irritate the digestion canal, while others can have a laxative and electrolyte-balancing effect. Most marine macroalgae are nontoxic in normal quantities, but members of the genus Lyngbya are potentially lethal.

What eats Sargassum seaweed? ›

Sargassum is a group of brown algae that provides food, refuge, and breeding ground for many marine animals, such as turtles, crabs, shrimp, fish, and seabirds.

Is it safe to swim in Sargassum? ›

Avoid recreating in waters that contain excessive Sargassum. Some of the organisms it harbors may irritate your skin. Stay away from areas where Sargassum is decomposing.

How do they get rid of Sargassum? ›

Disposal of Sargassum

The disposal of massive amounts of Sargassum that accumulates on beaches presents several challenges. Once Sargassum washes ashore, hoteliers and local governments usually remove it and pile it away out of sight from tourists or dispose of it in landfills.

Can sargassum seaweed be used for anything? ›

Sargassum seaweed can be used in a variety of ways, such as in fertilizer, animal feed, or as a renewable energy source.

Will the sargassum hit Florida? ›

Where will sargassum hit in Florida? It's possible for sargassum to wash up on any beach in Florida, but there are some beaches where it's rare or underwhelming, and some where huge masses of the seaweed are expected every summer.

Where in Florida is the sargassum headed? ›

The latest sargassum outlook, issued for March 2023, pegged late May as the timeframe when the southeast coast of Florida, which includes the Florida Keys, will start seeing seaweed appearing in larger quantities. Here's what to know about sargassum heading toward Florida this summer.

What is the largest living thing seen from space? ›

The reef, which is large enough to be visible from space, is made up of nearly 3,000 individual reefs. Much of the Great Barrier Reef is a marine protected area, managed by the Great Barrier Reef Marine Park Authority of Australia.

What is the hidden blob of water in the Atlantic? ›

In the fall of 2023, they discovered a large water blob in the Atlantic, which they named “Atlantic Equatorial Water.” Their detailed study was published in Geophysical Research Letters in a paper titled “Is There an Equatorial Water Mass in the Atlantic Ocean?”

What is the large mass in the ocean 2024? ›

“Sargassum abundance in the interior central Atlantic increased, but it increased so substantially that the abundance reached a new record from all previous December months,” the USF sargassum experts published online. “This indicates that 2024 will be another major Sargassum year.”

Where is the 5000 mile seaweed? ›

The Great Atlantic Sargassum Belt, a 5,000-mile-long belt of seaweed weighing more than 11 million tons, is threatening to wreak havoc in the coastal waters and beaches of the Atlantic Ocean. It's so big that it can be seen from space, spanning the tropical Atlantic from West Africa to the Caribbean.

Why is Mexico full of seaweed? ›

There are a number of different theories for the rise in the seaweed in Mexico over the last few years. These include changing climate and wind patterns; nutrient-rich waters; and less hurricane activity, meaning the shredding of the seaweed by storms is reduced.

What is the king of seaweed? ›

Kombu kelp in particular, possesses a flavor and nutritional value unlike any other seaweed, earning it the title – "the king of seaweeds."

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