Matches in SemOpenAlex for { <https://semopenalex.org/work/W1567216109> ?p ?o ?g. }
Showing items 1 to 50 of
50
with 100 items per page.
- W1567216109 abstract "This thesis covers a comprehensive analysis of long-range, deep-ocean, low-frequency, soundpropagation experimental results obtained from the North Pacific Ocean. The statistics ofacoustic fields after propagation through internal-wave-induced sound-speed fluctuationsare explored experimentally and theoretically.The thesis starts with the investigation of the North Pacific Acoustic Laboratory 98-99data by exploring the space-time scales of ocean sound speed variability and the contributions from different frequency bands. The validity of the Garret & Munk internal-wavemodel is checked in the upper ocean of the eastern North Pacific. All these results impose hard bounds on the strength and characteristic scales of sound speed fluctuations onemight expect in this region of the North Pacific for both internal-wave band fluctuationsand mesoscale band fluctuations.The thesis then presents a detailed analysis of the low frequency, broadband soundarrivals obtained in the North Pacific Ocean. The observed acoustic variability is compared with acoustic predictions based on the weak fluctuation theory of Rytov, and directparabolic equation Monte Carlo simulations. The comparisons show that a resonance condition exists between the local acoustic ray and the internal wave field such that only theinternal-waves whose crests are parallel to the local ray path will contribute to acousticscattering: This effect leads to an important filtering of the acoustic spectra relative tothe internal-wave spectra. We believe that this is the first observational evidence for theacoustic ray and internal wave resonance.Finally, the thesis examined the evolution with distance, of the acoustic arrival patternof the off-axis sound source transmissions in the Long-range Ocean Acoustic PropagationEXperiment. The observations of mean intensity time-fronts are compared to the deterministic ray, parabolic equation (with/without internal waves) and (one-way coupled) normalmode calculations. It is found the diffraction effect is dominant in the shorter-range transmission. In the longer range, the (internal wave) scattering effect smears the energy in boththe spatial and temporal scales and thus has a dominant role in the finale region." @default.
- W1567216109 created "2016-06-24" @default.
- W1567216109 creator A5008601105 @default.
- W1567216109 date "2007-01-01" @default.
- W1567216109 modified "2023-10-16" @default.
- W1567216109 title "Effects of internal waves on low frequency, long range, acoustic propagation in the deep ocean" @default.
- W1567216109 doi "https://doi.org/10.1575/1912/2123" @default.
- W1567216109 hasPublicationYear "2007" @default.
- W1567216109 type Work @default.
- W1567216109 sameAs 1567216109 @default.
- W1567216109 citedByCount "3" @default.
- W1567216109 crossrefType "monograph" @default.
- W1567216109 hasAuthorship W1567216109A5008601105 @default.
- W1567216109 hasBestOaLocation W15672161091 @default.
- W1567216109 hasConcept C111368507 @default.
- W1567216109 hasConcept C121332964 @default.
- W1567216109 hasConcept C127313418 @default.
- W1567216109 hasConcept C127413603 @default.
- W1567216109 hasConcept C146864707 @default.
- W1567216109 hasConcept C146978453 @default.
- W1567216109 hasConcept C204323151 @default.
- W1567216109 hasConcept C24890656 @default.
- W1567216109 hasConcept C39432304 @default.
- W1567216109 hasConceptScore W1567216109C111368507 @default.
- W1567216109 hasConceptScore W1567216109C121332964 @default.
- W1567216109 hasConceptScore W1567216109C127313418 @default.
- W1567216109 hasConceptScore W1567216109C127413603 @default.
- W1567216109 hasConceptScore W1567216109C146864707 @default.
- W1567216109 hasConceptScore W1567216109C146978453 @default.
- W1567216109 hasConceptScore W1567216109C204323151 @default.
- W1567216109 hasConceptScore W1567216109C24890656 @default.
- W1567216109 hasConceptScore W1567216109C39432304 @default.
- W1567216109 hasLocation W15672161091 @default.
- W1567216109 hasLocation W15672161092 @default.
- W1567216109 hasOpenAccess W1567216109 @default.
- W1567216109 hasPrimaryLocation W15672161091 @default.
- W1567216109 hasRelatedWork W1974985389 @default.
- W1567216109 hasRelatedWork W1986708290 @default.
- W1567216109 hasRelatedWork W1991480329 @default.
- W1567216109 hasRelatedWork W2069311737 @default.
- W1567216109 hasRelatedWork W2290372561 @default.
- W1567216109 hasRelatedWork W2621463365 @default.
- W1567216109 hasRelatedWork W2990284970 @default.
- W1567216109 hasRelatedWork W4232994759 @default.
- W1567216109 hasRelatedWork W4236515419 @default.
- W1567216109 hasRelatedWork W4249397390 @default.
- W1567216109 isParatext "false" @default.
- W1567216109 isRetracted "false" @default.
- W1567216109 magId "1567216109" @default.
- W1567216109 workType "book" @default.