Recent research published in ‘Frontiers in Marine Science’ sheds light on the increasing noise levels in our oceans, primarily attributed to the rise in global shipping activities. Lead author Luca Possenti from the Ocean Systems (OCS) at the Royal Netherlands Institute for Sea Research (NIOZ) emphasizes that since the industrial revolution, the ocean has become significantly noisier, with shipping contributing to ambient noise increases of several decibels, particularly at low frequencies between 10 and 100 Hz. This heightened noise can disrupt essential life functions in marine species, including foraging, mating, and resting.
The implications of this research extend beyond environmental concerns; they present both challenges and opportunities for the maritime industry. As shipping routes expand, particularly in polar regions due to climate change, there is a pressing need for vessel designs that minimize underwater noise. Engineers are already investigating ways to reduce noise emissions from ships, which could lead to innovations in ship design and technology. This focus not only addresses regulatory pressures but also enhances the industry’s sustainability profile, appealing to environmentally conscious consumers and stakeholders.
Possenti notes, “Modification of the sound speed profile can lead to the appearance of new ducts making specific depths noisier.” This highlights the complexity of underwater acoustics, where changes in ocean temperature and salinity can affect sound propagation. The potential for increased noise in certain areas presents a commercial opportunity for companies specializing in acoustic monitoring and noise reduction technologies, as there will be a growing demand for solutions that help mitigate the impact of shipping on marine life.
As the research indicates, the ocean’s uptake of carbon dioxide has decreased its pH, which in turn affects sound absorption and propagation. With the ocean potentially becoming noisier in the future, maritime professionals must be proactive in adapting to these changes. This could involve investing in research and development for quieter vessel technologies or exploring alternative shipping routes that minimize environmental impact.
The study highlights the interconnectedness of climate change, shipping, and underwater acoustics, urging the maritime sector to take a holistic approach to these challenges. As the industry navigates these evolving dynamics, embracing innovation will be crucial for maintaining a balance between commercial interests and environmental stewardship. The findings from Possenti and his team underscore the importance of addressing underwater noise as a critical factor for the future of marine ecosystems and the shipping industry alike.
