Experiment: OPUS (Organization of Persistent Upwelling Structures) Funding Agency: National Science Foundation Contractor: College of Oceanography, Oregon State University Dates: Pilot: March - April 1981 Main: April - July 1983 Location: California coastline: Pt. Conception to Pt. Arguello Data acquired during experiment: CTD data (/opus/ctd) XBT data (/opus/ctd) Moored current data (/opus/moorings) Lagrangian drifter data (/opus/drifters) ADCP data (in process) Meteorological data (see /NDBC) Sea level data (see /NOS) The OPUS (Organization of Persistent Upwelling Structures) program has focused on the persistent upwelling feature that occurs between Points Arguello and Conception off the coast of California. Initial exploratory investigation showed this upwelling structure to be driven primarily by local winds and directed to some extent by the larger scale circulation. Spatial and temporal patterns in the three-dimensional structure have been observed in the two previous pilot studies. These patterns presumably result from the coupling of physical, chemical and biological processes. The primary goal of OPUS is to understand the coupling of these processes. The principal investigators involved in OPUS are especially interested in small scale (0.1-50km) processes. (OSU data report 133, 87-18) Zookeeper@coast.ucsd.edu 11/30/93