The National Science Foundation sponsored Ocean Observatories Initiative (OOI) constructed and is now operating a network of science-driven sensor systems to measure the physical, chemical, geological, and biological variables in the ocean and seafloor. Greater knowledge of these variables is vital for improved detection and forecasting of environmental changes and their effects on biodiversity, coastal ecosystems, and climate.

The Pacific Northwest coastal component of OOI, called the Endurance Array, places a series of long-term moorings off the coast of Oregon and Washington. Oregon State University operates and maintains the Endurance Array's surface moorings, profilers with surface expressions, and gliders. The University of Washington maintains the parts of the Endurance Array cabled along the seabed to shore. The network of undersea gliders that OSU programs to survey the near-shore waters. Gliders transmit data from each of their instruments onshore several times a day. OOI's CyberInfrastructure makes data from all Endurance Array instruments available online in near real-time.

The construction of the infrastructure began September 1, 2009 and lasted six years. Then OOI was operated for an additional three years by OSU and the other institutions that constructed it under the same award. Bob Collier was the initial principal investigator of the OSU-OOI group with Jack Barth and Edward Dever as co-PIs. On October 1, 2018, a new consortium that included OSU started a new award to operate OOI for an additional five years. Current operations and maintenance planning is based on a 25-year life span.

The OOI observatories and subsystems include:

Coastal Observing Arrays:

  1. Endurance Array, with observation networks off Newport, OR and Grays Harbor, WA. These observing facilities are operated by OSU.
  2. Pioneer Array, with an observation network located in the mid-Atlantic bight. This observation facility is operated by the Woods Hole Oceanographic Institution.


Cabled Array: A cabled network of interconnected sites and sensors on the seafloor spanning multiple geological and oceanographic features and processes. The Cabled Array also provides power and bandwidth to the Endurance Array at two locations. It is operated by University of Washington.

Global Arrays: Autonomous moored buoy platforms at two deep water, high-latitude locations (Station Papa and Irminger Sea) are key to capturing large-scale ocean-atmosphere coupling where there has been little or no previous sustained coverage. These are operated by WHOI. Data collection with OOI moorings also continues at the Southern Ocean site OOI had occupied for several years, but this work is no longer funded by OOI. OOI's Global Array in the Argentine Basin was suspended indefinitely in 2018.

CyberInfrastructure (CI): OOI systems are integrated through the CI, which provides connectivity to scientists and classrooms, and allows the OOI to function as a single, secure, integrated network. This is operated by Rutgers University. OSU provides data QA/QC for Endurance Array data.

Ocean Observatories Initiative (OOI)
Implementation Organizations

Coastal and Global Scale Nodes

Cabled Array




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