International Quiet Ocean Experiment

International Quiet Ocean Experiment
Name	International Quiet Ocean Experiment
Formation	2010s
Type	Scientific initiative
Location	Global ocean

International Quiet Ocean Experiment

The International Quiet Ocean Experiment was a multinational initiative to assess and reduce the effects of anthropogenic sound on the marine environment. It sought to coordinate research across nations, institutions, and field programs to evaluate noise sources, biological responses, and mitigation under frameworks involving Intergovernmental Oceanographic Commission, United Nations Educational, Scientific and Cultural Organization, Scientific Committee on Antarctic Research, World Meteorological Organization, and marine science centers such as Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, National Oceanography Centre (UK), and Lamont–Doherty Earth Observatory. The initiative connected activities across ocean basins including the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean to inform policy instruments like the United Nations Convention on the Law of the Sea, Convention on Biological Diversity, and regional bodies such as the European Commission and North Atlantic Treaty Organization environmental offices.

Overview and Objectives

The program aimed to create an evidence base to characterize ambient ocean soundscapes, identify noise sources from commercial shipping, offshore oil and gas platforms, seismic surveys, and naval sonar operations, and evaluate impacts on taxa including cetaceans, baleen whales, odontocetes, beaked whales, pinnipeds, fish (e.g., Atlantic cod), and squid as well as on habitats like coral reefs and seagrass beds. Objectives included standardizing measurement protocols developed by groups such as International Association of Geophysical Contractors, harmonizing datasets from long-term observatories like Harbor Branch Oceanographic Institution arrays and Pangea Data initiatives, and supporting modeling efforts run by centers including NOAA, CSIRO, Plymouth Marine Laboratory, and IFREMER. The initiative interfaced with decision-makers from International Maritime Organization and conservation NGOs including World Wide Fund for Nature, The Nature Conservancy, and Greenpeace.

Scientific Background and Rationale

Acoustic ecology concerns shaped the rationale, drawing on prior work from researchers associated with Roger Payne-era studies of humpback whale song, passive acoustic monitoring developed at Cornell Lab of Ornithology and Mote Marine Laboratory, and experimental exposure research by groups at Duke University and University of St Andrews. Increasing global shipping linked to networks like Maersk and COSCO raised ambient noise documented in time series from sites such as Bermuda Atlantic Time-series Study and Station ALOHA. Seismic exploration techniques practiced by companies like Schlumberger and scientific programs like International Ocean Discovery Program contribute impulsive sources; naval exercises employing mid-frequency sonar used by navies including the United States Navy and Royal Navy prompted strandings investigated by teams at University of British Columbia and Monterey Bay Aquarium Research Institute. These historical threads informed risk assessments applied in frameworks such as the Precautionary Principle within international fora including Convention on Migratory Species.

Key Research Themes and Methods

Primary themes included soundscape characterization, behavioral ecology, population-level consequences, physiological stress responses, and mitigation efficacy. Methods combined passive acoustic monitoring arrays from ArcticNet deployments and AMAR (Autonomous Multichannel Acoustic Recorder) systems, controlled exposure experiments managed by institutions like NOAA Fisheries and Centre for Environment, Fisheries and Aquaculture Science, and tagging studies using satellite tags from Wildlife Conservation Society and Sea Mammal Research Unit. Modeling integrated outputs from HYCOM, Regional Ocean Modeling System, and sound propagation tools used by Acoustic Thermometry of Ocean Climate researchers. Statistical and computational approaches leveraged platforms such as PANGEA and high-performance computing centers at National Center for Atmospheric Research and European Centre for Medium-Range Weather Forecasts.

Governance, Coordination, and Funding

Governance relied on steering groups composed of partners from Intergovernmental Oceanographic Commission panels, national agencies like National Science Foundation, Natural Environment Research Council, Australian Research Council, and philanthropic foundations such as the Paul G. Allen Family Foundation and Gordon and Betty Moore Foundation. Coordination mechanisms included workshops convened at venues like International Marine Conservation Congress, United Nations Ocean Conference, and meetings hosted by Smithsonian Institution and Royal Society. Funding streams combined research grants, in-kind ship time from fleets including RV Polarstern and RRS Sir David Attenborough, and contributions from industry stakeholders represented by International Chamber of Shipping and consortia of hydrophone manufacturers.

Major Activities and Field Campaigns

Field campaigns spanned long-term ambient monitoring at observatories in the Mediterranean Sea, Gulf of Mexico, Bering Sea, and Southern Ocean with deployments from platforms including Argo floats modified for acoustic sensors, glider programs run by NATO Undersea Research Centre, and fixed moorings serviced by research vessels affiliated with Alfred Wegener Institute and Institute of Marine Research (Norway). Major coordinated efforts included multinational synoptic experiments mirroring methods from Southern Ocean Observing System and collaborative exposure studies drawing on expertise from University of California, Santa Cruz and Dalhousie University. Data synthesis activities produced community products analogous to those of Global Ocean Observing System and promoted open data via repositories inspired by PANGAEA.

Findings, Impacts, and Policy Implications

Results documented spatial and temporal trends in ambient noise, revealed behavioral displacement and altered vocal behavior in blue whale and sperm whale populations in regions managed under frameworks like CCAMLR, and quantified masking effects for fish species targeted by fisheries managed through Food and Agriculture Organization instruments. Evidence influenced policy recommendations adopted by International Maritime Organization including voluntary shipping measures, supported spatial management proposals for marine protected areas under Convention on Biological Diversity targets, and informed environmental impact assessments used by agencies such as Bureau of Ocean Energy Management. The initiative catalyzed sustained research networks linking academia, industry, and policy institutions and advanced methods for balancing ocean use with conservation priorities.

Category:Oceanography Category:Marine biology Category:Environmental policy