About Tethys

As industry, academia, and government seek to develop new renewable energy sources from tides, waves, and wind, potential environmental effects must be evaluated and measured to ensure that aquatic and avian animals, habitats, and ecosystem functions are not adversely affected, nor that important coastal and ocean uses are displaced.

 

Tethys was developed in 2009 by the Pacific Northwest National Laboratory (PNNL) to support the U.S. Department of Energy (DOE) Wind and Water Power Technologies Office. The primary functions of Tethys are twofold:

  • To facilitate the exchange of information and data on the environmental effects of marine and wind energy technologies; and
  • To serve as a commons for marine and wind energy practitioners and therefore enhance the connectedness of the renewable energy community as a whole.

 

Tethys supports a growing community of marine and wind energy researchers, regulators, and developers through outreach and communication channels including the Tethys Stories, pertinent organizations, databases with similar missions, and broadcasts of presentations, webinars, seminars, and symposia relating to the environmental effects of marine and wind energy. As the Tethys community expands and more users create accounts, each user’s personal interests and areas of expertise may be catalogued upon request to facilitate more communication amongst Tethys community members.

 

Together with other DOE national laboratories, National Marine Renewable Energy Centers, universities and industry, Tethys contributes to a program of research and development focused on unraveling the complexity of environmental issues associated with marine and wind renewable energy technologies. Tethys provides a number of ways to sort and search for data, connect with the research community, and learn more about the current status of the industry.

 

Use of Tethys

Tethys cultivates a collaborative research space for the exchange of technical information on the effects of marine and wind energy devices and their associated components. Tethys has been developed with the following user groups in mind:

  • Project Developers can view research findings that will assist with siting renewable projects while minimizing risk to the environment;
  • Regulatory Agency Staff will find support for permitting processes and natural resource management decisions to assist with streamlining the permitting process;
  • Stakeholders may be interested in the industry or in a proposed project's location and/or associated environmental studies that have been carried out;
  • Researchers can easily sift through relevant environmental documents to assist in studies and identify pressing research gaps.

 

Knowledge Base

The core of Tethys is a Knowledge Base that draws together metadata, supporting reports, relevant papers, videos, and other material to provide a current state of knowledge of environmental effects. The information provided in the Tethys knowledge base covers four categories:

  1. Marine energy (or MHK),
  2. Wind energy (offshore and land-based),
  3. An international collaboration focused on the environmental effects of marine energy (Annex IV), and
  4. An international collaboration focused on the environmental effects of wind energy (WREN).

All media are arranged into one large table. The columns can be sorted alphabetically by clicking on each column header, while the results can be filtered by clicking terms on the right or typing search terms into the Text Search. Clicking on a title will open the associated page in a new tab. Click here to access the Tethys Knowledge Base.

 

Map Viewer

The Tethys map viewer shows the location of information and documents that are associated with a geographic location, creating a subset of all the information within Tethys. This allows users to identify projects and studies visually, enabling them to easily associate results to different regions around the world. The information provided in the Tethys map viewer covers three types of media:

  1. Documents (white bubbles) - Any documents that have a specific location;
  2. Annex IV Project Sites (orange bubbles) - Metadata about project sites collected from developers and reports, updated on a regular basis;
  3. Annex IV Research Studies (green bubbles) - Metadata about research studies collected from researchers who are working on or have completed studies.

Markers are initially clustered together in larger blue blubbles that will regroup as the user zooms and pans around the map, and will eventually resolve into a color-coded marker. If one location has multiple pieces of content associated with it, the cluster icon will remain present. Secting a marker or cluster will expand a bubble with additional details, including a title linked to more information. Content can also be searched with filters such as country, developer, technology type, and keyword searches. Click here to access the Tethys Map Viewer.

 

Technologies Covered

Tethys provides information on the environmental effects of the following technologies:

  • Marine Energy Development: The act of harnessing naturally occuring renewable energy in the ocean to generate electricity.

    • MHK (general) - Generic term that applies to all 'Marine and Hydrokinetic' energy.
    • In-Stream Energy - The flow of the river is captured with either dams or independent turbines.
    • Ocean Current Energy - Capturing oceanic currents with turbines.
    • Ocean Thermal Energy Conversion - Utilizing temperature gradients in deep oceans to generate electricity.
    • Tidal Energy - Capturing tidal fluctuations with turbines, tidal barrages, or tidal lagoons.
    • Wave Energy - Capturing energy from waves with a point absorber buoy, surface attenuator, oscillating water column, or overtopping device.
  • Wind Energy Development: The act of harnessing naturally occuring wind with turbines.

    • Offshore Wind - Capturing wind from offshore locations of varying depths, using similar turbine technology to land-based devices.
    • Land-Based Wind - Capturing wind with turbines on land from areas where wind speeds are highest.

 

Advantages to the Tethys Development Platform

Tethys has been developed using Drupal, supporting a “smart” database that has certain advantages over standard databases. Tethys draws on many years of software and systems development from the Knowledge Encapsulation Framework (KEF) at PNNL, allowing users to sematically search and organize data through tagging individual files, documents, and multimedia products. Tethys is monitored and all content is quality assured and curated to ensure that content is current and accurate. Feedback and suggestions from users are actively encouraged; please contact us directly or provide us with your thoughts and input in the suggestion box located in the footer of ever page on Tethys. The Tethys team is routinely upgrading functionality and content based on user input.

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Please contact us if you would like to contribute any MHK or OSW information or research to Tethys.