ocean

24 Articles

Floating Buoy Measures Ocean Conditions

July 22, 2025 by 11 Comments

Out on Maui, [rabbitcreek] desired to keep track of local ocean conditions. The easiest way to do that was by having something out there in the water to measure them. Thus, they created a floating ocean sensor that could report back on what’s going on in the water.

The build uses a Xiao ESP32-S3 as the brains of the operation. It’s paired with a Wio-SX1262 radio kit, which sends LoRa signals over longer distances than is practical with the ESP32’s onboard WiFi and Bluetooth connections. The microcontroller is hooked up with a one-wire temperature sensor, a DF Robot turbidity sensor, and an MPU6050 gyroscope and accelerometer, which allow it to measure the water’s condition and the motion of the waves. The whole sensor package is wrapped up inside a 3D printed housing, with the rest of the electronics in a waterproof Pelican case.

It’s a neat project that combines a bunch of off-the-shelf components to do something useful. [rabbitcreek] notes that the data would be even more useful with a grid of such sensors all contributing to a larger dataset for further analysis. We’ve seen similar citizen science projects executed nicely before, too. If you’ve been doing your own ocean science, don’t hesitate to let us know what you’re up to on the tipsline!

How Do We Deal With Microplastics In The Ocean?

February 6, 2025 by 47 Comments

Like the lead paint and asbestos of decades past, microplastics are the new awful contaminant that we really ought to do something about. They’re particularly abundant in the aquatic environment, and that’s not a good thing. While we’ve all seen heartbreaking photos of beaches strewn with water bottles and fishing nets, it’s the invisible threat that keeps environmentalists up at night. We’re talking about microplastics – those tiny fragments that are quietly infiltrating every corner of our oceans.

We’ve dumped billions of tons of plastic waste into our environment, and all that waste breaks down into increasingly smaller particles that never truly disappear. Now, scientists are turning to an unexpected solution to clean up this pollution with the aid of seashells and plants.

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Waves crash near a rocky shore. Large, SUV-sized blue "floaters" sit in the water perpendicular to a concrete pier. The floaters look somewhat like a bass boat shrink wrapped in dark blue plastic and attached to a large piston and hinge. A grey SUV sits on the pier, almost as if for scale.

US Is Getting Its First Onshore Wave Power Plant

November 28, 2024 by 60 Comments

Renewables let you have a more diverse set of energy inputs so you aren’t putting all your generation eggs in one basket. One type of renewable that doesn’t see a lot of love, despite 80% of the world’s population living within 100 km (~60 mi) of a coastline, is harnessing the energy of the tides. [via Electrek]

“The U.S. Department of Energy’s National Renewable Energy Laboratory estimates that wave energy has the potential to generate over 1,400 terawatt-hours per year,” so while this initial project won’t be huge, the overall possible power generation from tidal power is nothing to sneeze at. Known more for its role in shipping fossil fuels, the Port of Los Angeles will host the new wave power pilot being built by Eco Wave Power and Shell. Eco Wave’s system uses floaters to drive pistons that compress hydraulic fluid and turn a generator before the decompressed fluid is returned to the pistons in a nice, tidy loop.

Eco Wave plans to finish construction by early 2025 and already has the power conversion unit onsite at the Port of Los Angeles. While the press release is mum on the planned install capacity, Eco Wave claims they will soon have 404.7 MW of installed capacity through several different pilot projects around the world.

We covered another Swedish company trying to harness tidal power with underwater kites, and if wave power isn’t your thing but you still like mixing water and electricity, why not try offshore wind or a floating solar farm? Just make sure to keep the noise down!

Undersea Cable Repair

July 30, 2024 by 6 Comments

The bottom of the sea is a mysterious and inaccessible place, and anything unfortunate enough to slip beneath the waves and into the briny depths might as well be on the Moon. But the bottom of the sea really isn’t all that far away. The average depth of the ocean is only about 3,600 meters, and even at its deepest, the bottom is only about 10 kilometers away, a distance almost anyone could walk in a couple of hours.

Of course, the problem is that the walk would be straight down into one of the most inhospitable environments our planet has to offer. Despite its harshness, that environment is home to hundreds of undersea cables, all of which are subject to wear and tear through accidents and natural causes. Fixing broken undersea cables quickly and efficiently is a highly specialized field, one that takes a lot of interesting engineering and some clever hacks to pull off.

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Satellite Provides Detailed Data On Antarctic Ice

February 2, 2024 by 19 Comments

Ever since the first satellites started imaging the Earth, scientists have been using the data gathered to learn more about our planet and improve the lives of its inhabitants. From weather forecasting to improving crop yields, satellites have been put to work in a wide array of tasks. The data they gather can go beyond imaging as well. A new Chinese satellite known as Fengyun-3E is using some novel approaches to monitor Antarctic sea ice in order to help scientists better understand the changing climate at the poles.

While it is equipped with a number of other sensors, one of the more intriguing is a piece of equipment called WindRad which uses radar to measure wind at various locations and altitudes based on how the radar waves bounce off of the atmosphere at various places.  Scientists have also been able to use this sensor to monitor sea ice, and can use the data gathered to distinguish new sea ice from ice which is many years old, allowing them to better understand ice formation and loss at the poles. It’s also the first weather satellite to be placed in an early morning orbit, allowing it to use the long shadows cast by the sun on objects on Earth’s surface to gather more information than a satellite in other orbits might be able to.

With plenty of other imaging sensors on board and a polar orbit, it has other missions beyond monitoring sea ice. But the data that it gathers around Antarctica should give scientists more information to improve climate models and understand the behavior of sea ice at a deeper level. Weather data from satellites like these isn’t always confined to academia, though. Plenty of weather satellites broadcast their maps and data unencrypted on radio bands that anyone can access.

Polynesian Wayfinding Traditions Let Humans Roam The Pacific Ocean

February 1, 2024 by 24 Comments

Polynesian cultures have a remarkable navigational tradition. It stands as a testament to human ingenuity and an intimate understanding of nature. Where Western cultures developed maps and tools to plot courses around the world, the Polynesian tradition is more about using human senses and pattern-finding skills to figure out where one is, and where one might be going.

Today, we’ll delve into the unique techniques of Polynesian navigation, exploring how keen observation of the natural world enabled pioneers to roam far and wide across the breadth of the Pacific.

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Keeping Watch Over The Oceans With Data Buoys

December 28, 2023 by 12 Comments

When viewed from just the right position in space, you’d be hard-pressed to think that our home planet is anything but a water world. And in all the ways that count, you’d be right; there’s almost nothing that goes on on dry land that isn’t influenced by the oceans. No matter how far you are away from an ocean, what’s going on there really matters.

But how do we know what’s going on out there? The oceans are trackless voids, after all, and are deeply inhospitable to land mammals such as us. They also have a well-deserved reputation for eating anything that ventures into them at the wrong time and without the proper degree of seafarer’s luck, and they also tend to be places where the resources that run our modern technological society are in short supply.

Gathering data about the oceans is neither cheap nor easy, but it’s critically important to everything from predicting what the weather will be next week to understanding the big picture of what’s going on with the climate. And that requires a fleet of data buoys, outnumbering the largest of the world’s navies and operating around the clock, keeping track of wind, weather, and currents for us.

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