Southern Ocean Observing System

Southern Ocean Observing System
Name	Southern Ocean Observing System
Formation	2009
Type	International scientific initiative
Region served	Southern Ocean
Parent organization	Scientific Committee on Antarctic Research

Southern Ocean Observing System is an international initiative coordinating observational activities in the Southern Ocean to advance understanding of climate, oceanography, and ecosystems. The program integrates measurements from ships, satellites, autonomous platforms, and time-series stations to support research linked to Intergovernmental Panel on Climate Change, World Meteorological Organization, United Nations Framework Convention on Climate Change, and Antarctic science programs such as Scientific Committee on Antarctic Research and Council of Managers of National Antarctic Programs. It interfaces with regional initiatives including Commission for the Conservation of Antarctic Marine Living Resources, International Arctic Science Committee, and national agencies like National Science Foundation (United States), British Antarctic Survey, and Commonwealth Scientific and Industrial Research Organisation.

Overview

The initiative coordinates measurement networks across the Southern Ocean, spanning the Weddell Sea, Ross Sea, Amundsen Sea, and subantarctic regions such as the Kerguelen Plateau and South Georgia and the South Sandwich Islands. It brings together programs from United States Antarctic Program, Australian Antarctic Division, French Polar Institute Paul-Émile Victor, Instituto Antártico Argentino, CONICET, Instituto Antártico Chileno (INACH), and research vessels like RV Polarstern, RRS James Clark Ross, and RV Nathaniel B. Palmer. The network emphasizes coherence with satellite missions such as Jason-3, CryoSat-2, Sentinel-3, and ICESat-2, and with model centers including National Oceanic and Atmospheric Administration, European Centre for Medium-Range Weather Forecasts, and UK Met Office.

History and development

Origins trace to community synthesis workshops involving Scientific Committee on Antarctic Research, International Council for Science, and contributors from national programs including National Science Foundation (United States), Forschungszentrum Jülich, and Instituto Antártico Chileno (INACH). Early milestones included alignment with the International Polar Year (2007–2008) legacy, incorporation of recommendations from the Intergovernmental Panel on Climate Change Fifth Assessment Report, and collaborations with projects such as Southern Ocean Fluxes and Exchanges (SOFE), Global Ocean Observing System, and Argo program. Key meetings convened at venues like Scott Polar Research Institute, Scripps Institution of Oceanography, and Lamont–Doherty Earth Observatory to set observing priorities, producing strategy documents adopted by Scientific Committee on Antarctic Research and endorsed by research funders such as European Commission research frameworks and national science councils.

Observing technologies and platforms

The program harnesses a diversity of platforms: icebreaker-supported shipboard surveys using instruments like CTD rosettes on vessels including RV Polarstern and RRS Sir David Attenborough; autonomous profiling floats from the Argo program modified for polar conditions; gliders and autonomous underwater vehicles developed by Woods Hole Oceanographic Institution and Ifremer; moorings maintained by groups such as Scripps Institution of Oceanography and Alfred Wegener Institute; drifting buoys from Global Drifter Program; and remote sensing from satellites operated by European Space Agency, National Aeronautics and Space Administration, and Japan Aerospace Exploration Agency. Biogeochemical sensors measure carbon system variables in line with protocols from International Ocean Carbon Coordination Project and Surface Ocean CO2 Atlas, while biological sampling links to initiatives like Census of Marine Life and SCAR's Scientific Research Programmes.

Scientific objectives and priorities

Primary objectives include quantifying Southern Ocean uptake of heat and carbon to inform Intergovernmental Panel on Climate Change assessments, resolving the role of the Antarctic Circumpolar Current and fronts such as the Polar Front in global circulation modeled by Coupled Model Intercomparison Project. Ecosystem priorities address krill dynamics relevant to Commission for the Conservation of Antarctic Marine Living Resources management, trophic interactions involving species listed by Convention on Migratory Species, and impacts on penguin populations studied by British Antarctic Survey and University of Cape Town. Observations support sea-ice and ice-shelf interactions investigated alongside glaciological research at Scott Polar Research Institute and British Antarctic Survey and feed into operational services provided by World Meteorological Organization and Global Ocean Observing System.

Data management and accessibility

Data stewardship follows community standards promoted by Global Ocean Observing System, World Data System, and PANGAEA (data publisher), employing metadata conventions from International Oceanographic Data and Information Exchange. Datasets are archived in repositories such as National Centers for Environmental Information, ACCESS (Australian data system), and European Marine Observation and Data Network and are discoverable via portals maintained by Global Change Master Directory and Copernicus Marine Service. The program advocates open data policies aligned with funders like European Commission and National Science Foundation (United States) and collaborates with modeling groups at NOAA Geophysical Fluid Dynamics Laboratory and UK Met Office for data assimilation.

International governance and collaborations

Governance is coordinated through bodies including Scientific Committee on Antarctic Research, Global Ocean Observing System, and partnerships with regional authorities such as Commission for the Conservation of Antarctic Marine Living Resources. Collaborative frameworks involve national programs—Australian Antarctic Division, British Antarctic Survey, United States Antarctic Program, Alfred Wegener Institute—and international projects like Argo program, Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM), and ANTOS (Arctic and Northern Hemisphere Observing Systems)-linked initiatives. Stakeholder engagement includes conservation NGOs and multilateral processes under United Nations Framework Convention on Climate Change and efforts to inform the Commission for the Conservation of Antarctic Marine Living Resources management advice.

Challenges and future directions

Operational challenges include harsh sea-ice conditions around the Antarctic Circumpolar Current, logistical limits of icebreakers operated by National Science Foundation (United States) and Russian Antarctic Expedition, and sustaining long-term funding from agencies like European Commission and national science ministries. Scientific challenges involve reducing gaps in high-latitude Argo coverage, improving satellite retrievals under sea-ice for missions like CryoSat-2 and Sentinel-3, and integrating biogeochemical and ecological observations for ecosystem-based management under Commission for the Conservation of Antarctic Marine Living Resources. Future directions emphasize expanding autonomous observing networks developed by Woods Hole Oceanographic Institution and Ifremer, strengthening data interoperability with Global Ocean Observing System and World Data System, and enhancing policy uptake through interactions with Intergovernmental Panel on Climate Change and regional governance bodies.

Category:Oceanography Category:Antarctic science Category:International scientific organizations