Tootfinder

Global ocean acidification has passed safe planetary boundary threshold: Study https://news.mongabay.com/short-article/2025/06/global-ocean-acidification-has-passed-safe-planetary-boundary-threshold-study/

Global ocean acidification has passed safe planetary boundary threshold: Study
A new assessment finds that the world’s oceans crossed the safe threshold for acidification in 2020, breaching a key planetary boundary and posing serious threats to marine life. Ocean acidification is caused when excess atmospheric carbon dioxide, resulting from human activities like burning fossil fuels, dissolves in seawater, forming carbonic acid that increases the water’s […]

Seen David Attenborough's film Ocean? Track countries' progress in signing and ratifying the High Seas Treaty, needed to protect 30% of the oceans.
https://highseasalliance.org/treaty-ratification/map/
Here's Europe:
orange = signed only,

High Seas Treaty Ratification Map
At least 60 countries must sign and ratify the High Seas Treaty for it to become international law. Follow progress and see who has signed and ratify the treaty on the world map.

"Ocean currents can generate electricity, and our study shows Africa's seas have some of the strongest"
#Africa #Oceans #Energy

Ocean currents can generate electricity, and our study shows Africa's seas have some of the strongest
The world's oceans cover more than 70% of Earth's surface. They're filled with currents, some much stronger than the fastest flowing large rivers. These currents can be harnessed as clean, marine renewable energy. Marine energy is much more predictable and reliable than many other forms of renewable energy because unlike the sun and wind, which regularly do not produce electricity, ocean currents never stop moving around the planet. New research has found that the eastern and south-eastern coas…

Ensemencer les océans avec du fer pour stimuler la capture de CO2 est une idée intéressante, mais les inconnues sont encore trop nombreuses pour se lancer dans cette voie Š l'échelle industrielle.
Explications.
https://theconversation.co…

Not really,
because the oceans around reefs aren't deserts
https://bsky.app/profile/gobyone.bsky.social/post/3lqwx35b4fs2f

Simon J. Brandl (@gobyone.bsky.social)
Heard of "Darwin's paradox"? It refers to Charles Darwin's observation that coral reefs are wildly productive despite occurring in nutrient-poor tropical oceans. Reefs are, so the story goes, oases in marine deserts 🏝️... Turns out that 2/3 of these assertions are very wrong... 🌐 🦑🧪 🧵⬇️

Nations urged to make UN summit a 'turning point' for oceans #environment

Nations urged to make UN summit a 'turning point' for oceans
Nations will be under pressure to deliver more than just rhetoric at a UN oceans summit in France next week, including much-needed funds to better protect the world's overexploited and polluted seas.

"Stephen Fry and Theo James to star in film about marine bottom trawling"
#Oceans #Environment

Weekend #Plankton Factoid 🦠🦐
Light is an extremely important factor in the oceans. It governs not only photosynthesis, but is also an important cue for vertically migrating zooplankton and needed for visual predation. The finding that 20% of the #oceans, especially at vital polar regions, are incre…

'‘Probiotic Can Slow Disease on Coral Reefs: They Have Microbiomes That Benefit, Like Humans"
#Oceans #Environment #CoralReef

Ingredient in Yogurt Can Slow Disease in Reefs as Corals Have Microbiomes That Benefits From Probiotics
A new Smithsonian study demonstrated how a probiotic could save coral reefs at-risk with SCTLD disease in Florida and the Caribbean.

@… No Dirty #Drilling in Our Oceans
The Trump administration is developing a new proposal that could dramatically increase #oil and

"Macron says High Seas Treaty could take effect from January after surge in support at ocean summit"
#Oceans #Environment

UN urges countries to ratify landmark High Seas Treaty
UN Secretary General Antonio Guterres urged world leaders to ratify the treaty, warning that fishing, plastic pollution and rising sea temperatures were destroying ocean ecosystems.

William warns ocean life 'diminishing before our eyes' #ocean

Prince William calls for protection of world's oceans in Monaco
The Prince of Wales gave a speech in Monaco hoping to drive investments to protect the world's oceans.

'‘Ticking timebomb’: sea acidity has reached critical levels, threatening entire ecosystems – study"
#Oceans #Environment

Tief im #Labradorsee erforscht ein Netzwerk autonomer Roboter, wie #Plankton und „mariner Schnee“ #CO2 langfristig im Ozean speichern.
Das Projekt

Marine robots are exploring the ocean's role in climate control
A robotic fleet in the Labrador Sea is tracking sinking carbon to reveal how the deep ocean helps regulate Earth’s climate.

"Reefs made from human ashes could revive British seabeds, says startup"
#UK #UnitedKingdom #Oceans #Environment

"Tuna fishing devices drift through a third of oceans, harming corals, coasts: Study"
#Fishing #Oceans #Pollution

Tuna fishing devices drift through a third of oceans, harming corals, coasts: Study
A recent study reveals that drifting fish aggregating devices (dFADs), widely used in tuna fishing, have spread to more than a third of the world’s oceans.  These devices harm ocean life and coastal communities, but weak rules and lack of accountability make it hard to manage them properly, some conservationists say. The study, published in […]

Detecting Atmospheric CO2 Trends as Population-Level Signatures for Long-Term Stable Water Oceans and Biotic Activity on Temperate Terrestrial Exoplanets
Janina Hansen, Daniel Angerhausen, Sascha P. Quanz, Derek Vance, Bj\"orn S. Konrad, Emily O. Garvin, Eleonora Alei, Jens Kammerer, Felix A. Dannert
https://arxiv.org/abs/2…

Detecting Atmospheric CO2 Trends as Population-Level Signatures for Long-Term Stable Water Oceans and Biotic Activity on Temperate Terrestrial Exoplanets
Identifying key observables is essential for enhancing our knowledge of exoplanet habitability and biospheres, as well as improving future mission capabilities. While currently challenging, future observatories such as the Large Interferometer for Exoplanets (LIFE) will enable atmospheric observations of a diverse sample of temperate terrestrial worlds. Using thermal emission spectra that represent conventional predictions of atmospheric CO2 variability across the Habitable Zone (HZ), we assess…

Watching Trump and Musk turn off the NOAA data centres, threatening irreplaceable archives of weather and climate data and analyses. Remembering when Stephen Harper’s government shut down a bunch of government libraries and archives, including literally throwing irreplaceable records in the trash.

The Harper Government Has Trashed and Destroyed Environmental Books and Documents
In the first few days of 2014, scientists, journalists, and environmentalists were horrified to discover that the Harper government had begun a process to close seven of the 11 of Canada's world-renowned Department of Fisheries and Oceans libraries...

This https://arxiv.org/abs/2307.01916 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Maximizing Seaweed Growth on Autonomous Farms: A Dynamic Programming Approach for Underactuated Systems Navigating on Uncertain Ocean Currents
Seaweed biomass presents a substantial opportunity for climate mitigation, yet to realize its potential, farming must be expanded to the vast open oceans. However, in the open ocean neither anchored farming nor floating farms with powerful engines are economically viable. Thus, a potential solution are farms that operate by going with the flow, utilizing minimal propulsion to strategically leverage beneficial ocean currents. In this work, we focus on low-power autonomous seaweed farms and desig…

Most oceans over the globe have experienced surface warming during the past century,
but the subpolar Atlantic is quite otherwise.
The sea surface temperature cooling trend to the south of Greenland,
-- known as the North Atlantic Warming Hole,
-- has raised debate over whether it is driven by the slowing of the Atlantic Meridional Overturning Circulation.
Here we use observations as a benchmark and climate models as a tool to demonstrate that only models sim…

Weakened Atlantic Meridional Overturning Circulation causes the historical North Atlantic Warming Hole - Communications Earth & Environment
The North Atlantic Warming Hole is tied to a weakened Atlantic Meridional Overturning Circulation during the past century, according to climate models and observation data.

"UN summit to tackle 'emergency' in world's oceans"
#UN #UnitedNations #Oceans #Environment

UN summit to tackle 'emergency' in world's oceans
A global summit on the dire state of the oceans kicks off Monday in France, with calls to ban bottom trawling and bolster protections for the world's overexploited marine areas.

"Just 2% of tidal and offshore solar energy could make a dent in carbon dioxide emissions"
#Oceans #Energy #Renewables

Just 2% of tidal and offshore solar energy could make a dent in carbon dioxide emissions
Harnessing just 2% of the energy potential from tidal and offshore solar sources could make a significant dent in global CO2 emissions, new research has found.

This https://arxiv.org/abs/2401.14230 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Unravelling how winds and surface heat fluxes control the Atlantic Oceans meridional heat transport
The North Atlantic Ocean circulation, fuelled by winds and surface buoyancy fluxes, carries 1.25 PettaWatts of heat poleward in the subtropics, and helps in regulating global weather and climate patterns. Here, we assess the relative impacts of changes in winds and surface heat fluxes on the Atlantic Ocean circulation and heat transport on short timescales (<10 years) and long timescales (>50 years) using ocean simulations. We decompose the circulation and heat transport into warm and cold cell…

Satellite tracking of 12,000 marine animals reveals ocean giants are in trouble #ocean

Satellite tracking of 12,000 marine animals reveals ocean giants are in trouble
A massive global collaboration has tracked over 12,000 marine animals from whales to turtles to create one of the most detailed movement maps of ocean giants ever assembled. The project, MegaMove, highlights how animal migrations intersect with fishing, shipping, and pollution, revealing alarming gaps in current ocean protections. Even if 30% of the oceans were protected, most critical habitats would still be exposed to threats.

"UK MPs call for ban on bottom trawling in protected marine areas"
#UK #UnitedKingdom #Oceans

On the concentration distribution in turbulent thermals
Ludovic Huguet, Victor Lherm, Renaud Deguen, Joris Heyman, Tanguy Le Borgne
https://arxiv.org/abs/2505.21707

On the concentration distribution in turbulent thermals
Turbulent thermals emerge in a wide variety of geophysical and industrial flows, such as atmospheric cumulus convection and pollutant dispersal in oceans and lakes. They form when a volume of buoyant fluid, arising from thermal or compositional density differences, is instantly released from a source. As they rise or sink, heat and mass transfers are likely to occur with the surrounding environment, spanning multiple scales from macroscopic entrainment of ambient fluid to microscopic diffusive …

"Top Ocean Experts Sound the Alarm Over Growing Marine Crisis Due To Climate Change"
#Oceans #Climate #ClimateChange

Top Ocean Experts Sound the Alarm Over Growing Marine Crisis Due To Climate Change - Inside Climate News
On the opening day of a global science conference, French fishery scientist Clea Abello presented research showing that marine protected areas could protect commercially valuable fisheries.

"Campaigners hail plan to ban bottom trawling in half of England’s protected seas"
#UK #UnitedKingdom #Environment

"Only a tiny % of the deep seafloor has ever been visually observed: Study"
#Oceans #Environment

Only a tiny % of the deep seafloor has ever been visually observed: Study
For national and international policymakers, decisions on how to regulate — and whether to allow — exploitative human activities such as deep-sea mining require good information. A new study suggests that when it comes to the ocean floor, they may not have it. Only 0.001% of the deep seafloor has ever been captured by photo […]

This https://arxiv.org/abs/2401.14230 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Unravelling how winds and surface heat fluxes control the Atlantic Oceans meridional heat transport
The North Atlantic Ocean circulation, fuelled by winds and surface buoyancy fluxes, carries 1.25 PettaWatts of heat poleward in the subtropics, and helps in regulating global weather and climate patterns. Here, we assess the relative impacts of changes in winds and surface heat fluxes on the Atlantic Ocean circulation and heat transport on short timescales (<10 years) and long timescales (>50 years) using ocean simulations. We decompose the circulation and heat transport into warm and cold cell…

This https://arxiv.org/abs/2308.13614 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The role of interior dynamics and differentiation on the surface and atmosphere of lava planets
Lava planets are rocky exoplanets that orbit so close to their host star that their day-side is hot enough to melt silicate rock. Their short orbital periods ensure that lava planets are tidally locked into synchronous rotation, with permanent day and night hemispheres. Such asymmetric magma oceans have no analogs in the Solar System and will exhibit novel fluid dynamics. Here we report numerical simulations of lava planet interiors showing that solid-liquid fractionation in the planetary int…

"Ministers pledge UK action to ratify high seas treaty by end of year"
#UK #UnitedKingdom #Oceans #Environment

"Oceans feel the heat from human climate pollution"
#Oceans #Environment #Climate #ClimateChange

Oceans feel the heat from human climate pollution
Oceans have absorbed the vast majority of the warming caused by burning fossil fuels and shielded societies from the full impact of greenhouse gas emissions.

"David Attenborough’s ‘Ocean’ is a brutal, beautiful wake-up call from the sea"
#Oceans #Environment #Film #Media

David Attenborough's 'Ocean' exposes the unseen destruction of the seas
The new film “Ocean With David Attenborough” is both a breathtaking celebration of marine life and a sobering exposé of the industrial forces pushing the ocean toward collapse. With never-before-seen footage from mass coral bleaching to the violent destruction of bottom trawling, it reveals the hidden toll of human activity beneath the waves. But it’s also a story of hope that spotlights thriving marine reserves and the power of protection. Timed to World Oceans Day and the U.N. Ocean Co…

"One-fifth of global ocean has become darker, shrinking vital photic zones"
#Oceans #Environment
https://

One-fifth of global ocean has become darker, shrinking vital photic zones
More than one-fifth of the global ocean—an area spanning more than 75 million sq km—has been the subject of ocean darkening over the past two decades, according to new research.

"Coral reef research dominated by rich countries, plagued with inequities: Study"
#Coral #CoralReef #Oceans

Coral reef research dominated by rich countries, plagued with inequities: Study
Most of the world’s coral reefs, and the communities that directly depend on them, are in the tropics, so one might imagine the research on them being led by scientists and institutions based in tropical countries. The reality, however, is far different, a new study shows. Coral reef science is actually dominated by researchers from […]

"Nations urged to make UN summit a 'turning point' for oceans"
#UN #UnitedNations #Oceans #Climate

Nations urged to make UN summit a 'turning point' for oceans
Nations will be under pressure to deliver more than just rhetoric at a UN oceans summit in France next week, including much-needed funds to better protect the world's overexploited and polluted seas.

"Samoa’s new marine spatial plan protects 30% of the country’s ocean"
#Samoa #Environment #Oceans #Conservation

Samoa’s new marine spatial plan protects 30% of the country’s ocean
Samoa, an archipelagic country composed of nine islands in the South Pacific Ocean, is on the frontline of climate change. Rising sea levels, ocean warming and acidification all pose significant threats to the country’s coastal communities. To help protect its future, the Samoan government announced June 3 that it has enacted a law establishing a […]