Renewable Energy Innovation Seen as Key to Slowing Ocean Warming and Acidification

From rising sea temperatures to untapped tidal energy potential, scientists warn that cutting fossil fuel use and accelerating renewable adoption are critical to protecting marine ecosystems and building a sustainable future.

• By Jane Marsh
• August 12, 2025

While reading about growing trends affecting a sustainable future, you’ve probably encountered articles warning of adverse ocean warming and acidification patterns. The issues affect marine life and risk the biodiversity of some of the world’s largest bodies of water. However, greenhouse gas emissions — including those linked to fossil fuel usage — are among the biggest contributors to these problems. Could renewable energy and related technologies ease the pressures on sea life?

Ocean Warming Levels More Than Quadrupled

Scientists are especially concerned about rising ocean temperatures because the phenomenon has been increasing rapidly. In one 2025 case, researchers explored what they called an energy imbalance. It occurs where more of the sun’s heat gets absorbed by the Earth instead of escaping to space. The group confirmed this discrepancy has approximately doubled since 2010, partially because of greenhouse gas emissions.

Additionally, the team’s data showed the ocean warming rate has more than quadrupled in the past 40 years. An analogy from the lead researcher envisioned the world’s oceans as a bathtub, with the faucet’s hot water previously changing the liquid’s temperature a fraction of a degree each decade. Now, the speed of that change has accelerated. He believes people must cut global emissions and work on net-zero goals to curb the momentum.

New Policies Likely Required

Increased renewable energy adoption could reduce emissions, but some areas may need to work harder to make meaningful impacts. That was one of the main findings from another 2025 study, which showed clean power generation did not lower or replace fossil fuel production. However, a key takeaway indicated static factors caused more than 96% of state-related variations in fossil fuel output.

Things like the fossil fuel deposits available in each state affect usage, leading the primary researcher to conclude that new policies may be necessary to reduce output and prioritize renewable energy. He suggested options including introducing carbon taxes that limit the use of conventional sources or establishing production caps on traditional power. Fossil fuels account for over three-quarters of greenhouse gas emissions and almost 90% of those associated with carbon dioxide.

Reducing fossil fuel dependence could meaningfully improve these worrying ocean-related trends. Increased demands from concerned citizens who care about the planet and its oceans should encourage authorities to act faster than they otherwise might.

One possibility might be to use oceans to accelerate renewable energy transitions. A 2025 study revealed coastal areas in South Africa and eastern Florida as among the best places for capturing kinetic energy from currents and finding new renewable sources. The data indicated locations in those sites had power densities surpassing 2,500 watts per square meter, equivalent to 2.5 times more energy than places identified as excellent wind farm candidates.

Offshore wind farms already show the promising feasibility of ocean-located renewable sites. However, this study’s angle provides an additional possibility that taps into natural forces. The more people learn about diverse options, the easier it will be to focus on those with the most potential.

Marine Life Sulphur Emissions Quantified

Ocean acidification happens when pH levels gradually decline. Deposits from sulfur and nitrogen oxide gases end up in the water because of pollution. Many people have sulfur issues in their water supplies, noticing a distinctive rotten egg smell. That odor can happen even if concentrations are lower than one part per million, proving households can experience unwanted effects without high amounts.

Researchers found something else surprising about sulfur when studying global emissions of methanethiol, a sulfuric gas produced by marine life. They based their work on a 40-year-old hypothesis suggesting microscopic plankton on the ocean’s surface produce sulfuric gas that reaches the Earth’s atmosphere. It then oxidizes and forms aerosol particles that reflect some solar radiation into space.

This effect reduces the planet’s heat retention, helping counteract the adverse effects of greenhouse gases. Additionally, the aerosols enable water droplet condensation and encourage optically dense clouds to form, elevating the cooling potential. The group’s data indicated that methanethiol emissions cause an average 25% boost in global marine sulfur output.

The researchers also built a model to assess how marine methanethiol emissions impact planetary radiation. Some of their broad takeaways included the fact that the overall effects are most noticeable in the Southern Hemisphere. This region has comparatively fewer countries, with human activities driving emissions and sulfur from burning fossil fuels.

Their data indicated that emitted methanethiol in the Southern Hemisphere increases aerosol particle formation by 30%-70%, thereby decreasing summertime incident solar radiation by 0.3-1.5 watts per square meter. This work confirms that oceans produce gases and particulate matter, causing immediate, positive climatic effects. Still, they caution that human-driven climate change happens to such an extent that the planet and its ocean waters will continue to warm without drastic, preventive action.

New Tidal Energy Insights Revealed

Warming oceans result in more substantial impacts than some people realize. For example, one statistic suggests they cause $428 billion in economic degradation annually, triggering instability for coastal community members with ocean-based jobs. However, opportunities to learn about tidal energy sources could tap into previously unused potential, helping the world invest in cleaner options.

Recent work centers on solving known problems that could make some decision-makers hesitate to explore this alternative. One study used innovative devices and approaches to pinpoint the complex interactions between ocean flows and the environment. The scientists relied on aerial drones and boat-based surveys to map the tide movements associated with the world’s most powerful tidal turbine, located in Scotland’s Orkney Islands.

Its platform stretches nearly 220 feet and connects to a European grid. Estimates suggest the turbine could provide electricity for 2,000 homes each year. However, the study indicated that changing tidal flows exceeding 8 knots could affect its performance. Additionally, the device’s downstream wake might impact sea life habitats or influence the placement of future energy projects. For instance, drone footage showed orcas and seabirds around the site, emphasizing how leaders must analyze environmental impacts from this project and similar ones.

Viewing the Ocean as a Renewable Energy Partner

Although you may rightfully feel concerned about adverse ocean trends caused by climate change, these examples show it’s time for authorities to think differently and see tides and coastal locations as important drivers of renewable energy use. Once that happens, reduced fossil fuel usage could equip oceanic waters for a more sustainable, stable future.