Global Drifter Program

Global Drifter Program
Name	Global Drifter Program
Established	1979

Global Drifter Program The Global Drifter Program is an international oceanographic initiative for measuring surface currents, sea surface temperature, and atmospheric conditions using satellite-tracked drifting buoys. It supports research in physical oceanography, climate science, and operational forecasting by providing near-real-time and archival observations that complement satellite missions and ship-based surveys.

Overview

The program deploys autonomous drifting buoys to sample the upper ocean, linking efforts by National Oceanic and Atmospheric Administration, Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, NOAA Atlantic Oceanographic and Meteorological Laboratory, and Laboratoire d'Océanographie de Villefranche with satellite assets such as TOPEX/Poseidon, Jason-1, Jason-2, Jason-3, Sentinel-3, GCOM-W1, and Aqua (satellite). Data from drifters feed into assimilative systems run by NOAA National Centers for Environmental Prediction, European Centre for Medium-Range Weather Forecasts, NASA Jet Propulsion Laboratory, and Met Office models like Global Forecast System. The program interconnects with observational networks including Argo (oceanography), Global Seafloor Observatory, TAO/TRITON, RAMA (array), and Gliders operations.

History and Development

Origins trace to experimental drifting buoy efforts led by researchers at Scripps Institution of Oceanography and Woods Hole Oceanographic Institution during collaborations with National Aeronautics and Space Administration and Office of Naval Research. Early milestones include deployments associated with the World Ocean Circulation Experiment and validation campaigns for SeaWiFS, ERS-1, and TOPEX/Poseidon. Leadership and technological evolution involved partnerships with NOAA Pacific Marine Environmental Laboratory, Lamont–Doherty Earth Observatory, French Institute for Research and Exploitation of the Sea, and Commonwealth Scientific and Industrial Research Organisation. Programmatic development responded to needs from Intergovernmental Panel on Climate Change assessments, World Climate Research Programme, and CLIVAR science plans. High-profile contributions supported studies related to El Niño–Southern Oscillation, North Atlantic Oscillation, and Indian Ocean Dipole.

Instrumentation and Technology

Drifters combine hardware from manufacturers and laboratories, integrating components developed with input from Scripps Institution of Oceanography, NOAA PMEL, Woods Hole Oceanographic Institution, and industry partners such as Teledyne Technologies and Aanderaa Data Instruments. Key elements include GPS receivers compatible with Global Positioning System and augmentation from GLONASS and Galileo, satellite communication via Argos (satellite system) and Iridium (satellite constellation), and sensors for sea surface temperature traceable to standards maintained by National Institute of Standards and Technology. Engineering draws on materials research from Massachusetts Institute of Technology, California Institute of Technology, and testing conducted at Naval Surface Warfare Center. Power systems employ long-life batteries and solar-assisted designs influenced by Jet Propulsion Laboratory heritage. Instrument calibration and intercomparison campaigns have been conducted with laboratories like Plymouth Marine Laboratory and Institut français de recherche pour l'exploitation de la mer.

Deployment and Operations

Drifters are deployed from vessels and aircraft operated by organizations such as NOAA Fisheries, United States Coast Guard, Royal Navy, French Navy, Australian Bureau of Meteorology research ships, and expedition platforms like RV Atlantis, RRS James Clark Ross, RV Investigator, and RV Knorr. International cooperation includes contributions from Japan Agency for Marine-Earth Science and Technology, Korean Institute of Ocean Science & Technology, National Taiwan University, Instituto Oceanográfico de São Paulo, and CSIR (South Africa). Operational logistics coordinate with ports and agencies like Port of Los Angeles, Port of Rotterdam, and Port of Singapore. Data relay and command centers work with satellite operators EUMETSAT and NOAA Satellite and Information Service. Maintenance and recovery efforts involve salvage teams and maritime authorities including Maritime and Coastguard Agency and U.S. Coast Guard.

Data Collection and Applications

Collected observations support oceanographic research at institutions such as Scripps Institution of Oceanography, Lamont–Doherty Earth Observatory, JAMSTEC, PANGEA (data repository), and Copernicus Marine Service. Time series inform analyses of currents in basins studied by NASA Goddard Space Flight Center, NOAA Pacific Marine Environmental Laboratory, CICAR, and universities like University of Washington, Massachusetts Institute of Technology, University of Oxford, University of Tokyo, and ETH Zurich. Applications include validation of satellite altimetry missions such as Jason-3, assimilation into forecasting systems run by NOAA NCEP, ECMWF, and Australian Bureau of Meteorology, and support for disaster response coordinated with UN Office for the Coordination of Humanitarian Affairs, International Maritime Organization, and World Meteorological Organization. Scientific outputs have been published in journals associated with American Geophysical Union, Nature (journal), Science (journal), and Journal of Geophysical Research. Data contribute to climate indices used in reports by Intergovernmental Panel on Climate Change and national assessments by agencies like NOAA and UK Met Office.

Governance and Funding

Program governance involves partnerships among National Oceanic and Atmospheric Administration, Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, NOAA PMEL, University of Washington, and international partners including European Commission initiatives such as Horizon 2020 projects and coordination with UNESCO Intergovernmental Oceanographic Commission. Funding streams have included grants and contracts from National Science Foundation, National Aeronautics and Space Administration, European Commission, Department of Energy, Australian Research Council, and philanthropic support from foundations like Gordon and Betty Moore Foundation and The David and Lucile Packard Foundation. Program advisory input has been provided by panels convened by World Meteorological Organization and International Oceanographic Commission.

Category:Oceanography