The collection consists of administrative files, technical documents, legal materials, correspondence and audiovisual materials from the Acoustic Thermometry of Ocean Climate Project.
Acoustic Thermometry of Ocean Climate Project Records, 1991-1996 (SAC 32)
Extent: 15.6 Linear feet (39 archives boxes)
Digital Content
All content in series 6) AUDIOVISUAL MATERIAL has been reformatted. Viewing/listening copies may be available for researchers. Please place requests for recordings through the finding aid.
The Acoustic Thermometry of Ocean Climate (ATOC) Project was launched in 1993 after several decades of mounting global warming concerns. The theoretical origins of ATOC can be traced as far back as 1975 when scientists Walter Munk and Carl Wunsch suggested acoustic tomography as a technique for measuring temperature variations across large expanses of the ocean.
This approach led to the 1991 Heard Island Feasibility Test (HIFT). Two sound sources were installed: one on Pioneer Seamont off central California and the other north of Kauai. Designed to establish the usable parameters of long-range acoustic transmissions in the ocean, this experiment determined that underwater sounds transmitted from Heard Island in the South Polar Sea could be discerned at great distances around the globe. These results provided the necessary conceptual foundation for the launch of the ATOC program in 1993.
ATOC was administered by the Cecil and Ida M. Green Institute of Geophysics and Planetary Physics at Scripps Institution of Oceanography, UC San Diego. The purpose of the project was to investigate climate change using satellite altimetry, acoustic thermometry and climate modeling in the North Pacific Ocean. As originally hypothesized, data analyses from ATOC confirmed that acoustic thermometry can be used as an effective tool for measuring large-scale ocean temperature variability.
Although ATOC was initially approved and the appropriate permits were attained, the project stirred considerable public controversy regarding the effects of underwater acoustics on marine mammals. Although the sound sources transmitted were in accordance with marine mammal study protocols, continuous negative media attention compelled the funders of the project to withdraw their support. ATOC was gradually defunded and ultimately discontinued in 2006. When the ATOC office closed, Peter Worcester transferred the Project's records to the Scripps Institution of Oceanography Archives.
The collection consists of administrative files, technical documents, legal materials, correspondence and audiovisual materials from the Acoustic Thermometry of Ocean Climate Project. Subjects of note include project publicity and the Marine Mammal Research Program.
Arranged in six series: 1) MEETINGS, 2) LEGAL FILES, 3) PUBLICITY, 4) SUBJECT FILES, 5) CORRESPONDENCE and 6) AUDIOVISUAL RECORDINGS.