Tethys Stories

Tethys Stories feature information on news, events, research, and projects relevant to wind and marine renewable energy development activities across the globe. Stories are contributed from individuals working in the field, and provide insight into advancing the energy industry in an environmentally responsible manner. If you are interested in providing content to be featured as a Tethys Story, please email dorian.overhus@pnnl.gov.

  • Submitted by Anne Marie O'Hagan on
    The beautifully scenic Cork Harbour in the south of Ireland has several geographical and historical claims to fame. It is the second largest natural harbour in the world, in the 1700s it was home to the largest butter market in the world and at the beginning of the twentieth century it was the last stopping point for the Titanic before its ill-fated trip across the Atlantic. For hundreds of… Read More
  • Submitted by Molly Grear on
    Plans to pin offshore wind turbines to the seafloor in the Atlantic Ocean have raised questions about potential risks to commercial shipping traffic, as vessels maneuver around the installations. To address this potential risk, Pacific Northwest National Laboratory (PNNL) scientists have developed an assessment of navigation safety risks, with support from the Bureau of Ocean Energy Management (… Read More
  • Submitted by Molly Grear on
    A recent article in Current Biology entitled Marine mammals trace anthropogenic structures at sea highlights how marine mammals may interact with offshore windfarms.  As new larger scale installations become more common, research of this kind will support observations of in situ array-scale impacts of windfarms.  A team of scientists, headed by Deborah Russell of the Sea Mammal Research Unit (… Read More
  • Submitted by Andrea Copping on
    As wave and tidal devices are deployed in coastal waters and estuaries in countries around the world, there is intense interest in understanding how marine mammals, sea birds, fish, and sea turtles may interact with the machines underwater.  Will animals be at risk from rotating tidal turbine blades? Will they be attracted to the foundations, anchors, and devices? Will they sense the mooring… Read More
  • Submitted by Alicia Gorton on
    Currently, Europe is the world-leader in offshore wind energy developments, with the first offshore wind farm installed in Denmark in 1991. Since then, offshore wind energy projects in Europe have been supplying significant amounts of power to European grids, with the United Kingdom having the largest capacity of offshore wind farms, and Denmark and Belgium ranking second and third, respectively… Read More
  • Submitted by Molly Grear on
    Siting and permitting/consenting tidal turbines and wave energy converters is a major challenge to the marine energy industry, as many people envision harm coming to marine animals. With many marine mammals holding endangered species status, this issue can adversely impact the public acceptance of marine renewable energy. Researchers in Scotland are developing methods to examine interactions, and… Read More
  • Submitted by Tehani Montaron on
    The plans for Reedsport Wave Park were discontinued in April when Ocean Power Technologies (OPT) abandoned a permit from the Federal Energy Regulatory Commission (FERC) to deploy a PowerBuoy off the coast of Reedsport, Oregon due to inability to secure funding for the project when faced with increased costs.  It was the only FERC license issued to a wave energy project in the United States,… Read More
  • Submitted by Tehani Montaron on
    Last month, the Federal Energy Regulatory Committee (FERC) approved a pilot license for Snohomish County PUD to install two OpenHydro tidal turbines in Admiralty Inlet, WA. This project is the first grid-connected two-turbine project in the US; installation is planned for the summer of 2015.  The OpenHydro tidal turbines that Snohomish County PUD will use are designed to be placed directly into… Read More
  • Submitted by Jonathan Whiting on
    DeepCwind is a consortium that is planning to launch two direct drive 6 MW Goldwind turbines inside state waters, about 2.8 miles south of Monhegan Island, Maine. The island is home to full-time residents who have expressed interest in the noise effects of the project. To address this issue, the air-based sound attenuation surrounding the site was modeled using WindPRO software. WindPRO software… Read More
  • Submitted by Jonathan Whiting on
    The presence of wave energy devices off the Pacific coast of the United States could pose a threat to Pacific gray whales. The whales migrate approximately 15,000 - 200,000 km round trip between their primary feeding grounds in the Bering and Chukchi Seas and their calving and primary breeding grounds in Baja California, Mexico. Investigations using conceptual and individual-based models may help… Read More