Accession Number : ADA256496


Title :   Study of Basin Scale Acoustic Transmissions


Descriptive Note : Master's thesis


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE


Personal Author(s) : Nystrom, John R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256496.pdf


Report Date : Sep 1992


Pagination or Media Count : 64


Abstract : A basin-scale acoustic tomography experiment was conducted in the northeast Pacific from May 1987 to September 1987. In this thesis, the stability of the forward model is analyzed. There are large non-linearities in the changes in travel time between ray paths for the four seasons. I constructed a model in which the change in warming in the upper 100 m of the ocean was due only to changes in surface solar irradiance. The value of the surface solar irradiance anomalies necessary to cause the tomography results for warming (Spiesberger and Metzger, 1991) was computed. This value was larger than the actual value of surface solar irradiance anomaly which was computed using inputs measured by satellite (Chertock, 1989).


Descriptors :   *ACOUSTICS , *TOMOGRAPHY , INPUT , ANOMALIES , STABILITY , MODELS , PATHS , OCEANS , SEASONS , TRAVEL TIME , TRAVEL , THESES , TIME , SURFACES , SCALE , ARTIFICIAL SATELLITES


Subject Categories : Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE