“RICHLAND, Wash. – Marine scientists from around the world spent the last four years reviewing numerous studies and other data on the possible environmental effects of marine renewable energy (MRE) devices and found that the potential impact to marine life is likely small or undetectable. However, scientists say there is still uncertainty around some issues, as there have been relatively few sizable deployments of MRE devices around the world where data can be collected.
“The 2020 State of the Science Report was released today by Ocean Energy Systems (OES)-Environmental, a collaboration under Ocean Energy Systems,supported by the International Energy Agency, and dedicated to examining the environmental effects of MRE development. The 300-page report is the most comprehensive international analysis to date on the issue. The report’s release coincides with World Oceans Day and with President Trump’s proclamation of June as National Ocean Month.
“We believe that small numbers of operational marine energy devices are unlikely to cause harm to marine animals, including marine mammals, fish, diving seabirds, and benthic animals; change habitats on the seafloor or in the water significantly; or change the natural flow of ocean waters or waves,” said Andrea Copping, an oceanographer with the U.S. Department of Energy’s Pacific Northwest National Laboratory and lead author of the report.
“With the ocean covering more than 70 percent of the Earth’s surface, drawing upon the power of the ocean to provide electricity would reduce the carbon footprint from energy production, provide grid stability in remote, coastal areas, and could add $3 trillion to the global economy. MRE development is also expected to create new jobs in supply chain companies and environmental consultancies.
“MRE is generated from ocean waves, tides, and currents; ocean temperature and salinity gradients; and the flow of large rivers. For example, devices like wave energy converters extract the power from ocean waves and convert it into electricity. Developing a fraction of available wave energy in U.S. waters could result in clean, reliable power for millions of American homes.
“The report represents the most up-to-date knowledge on environmental effects of MRE, based on studies and monitoring from publicly available, peer-reviewed scientific literature and reports. The 30 scientists who authored the report investigated potential stressors, including:
- Underwater noise.
- Electromagnetic fields.
- Changes in oceanographic processes, including circulation, wave height, sediment transport patterns, water quality, and marine food webs.
- Encounters with moorings and cables.
- The risk of a marine mammal or fish colliding with a device.
“Despite our findings, we still need more data about what might, or might not, happen to animals swimming close to operating turbines underwater. In the years to come, we will continue to focus our research on examining this issue and building our knowledge base to help progress this important renewable energy industry,” Copping said…”
We provide this article link to PNNL Current , but do not try to make the whole article ours. It does not belong to us. We only give you a flavour of it, so you can make up your own mind if you like and want to support the award-winning scientific research behind it, like we do. Of course, we do not nor could support all the points made in any article we highlight, but that is part of living in a democracy. We believe the material is relevant to all and is necessary for their personal judgments.