Statistics of low-frequency normal-mode amplitudes in an ocean with random sound-speed perturbations: shallow-water environments

The Journal of the Acoustical Society of America
John A ColosiAndrey K Morozov

Abstract

Second- and fourth-moment mode-amplitude statistics for low-frequency ocean sound propagation through random sound-speed perturbations in a shallow-water environment are investigated using Monte Carlo simulations and a transport theory for the cross-mode coherence matrix. The acoustic observables of mean and mean square intensity are presented and the importance of adiabatic effects and cross-mode coherence decay are emphasized. Using frequencies of 200 and 400 Hz, transport theory is compared with Monte Carlo simulations in a canonical shallow-water environment representative of the summer Mid-Atlantic Bight. Except for ranges less than a horizontal coherence length of the sound structure, the intensity moments from the two calculations are in good agreement. Corrections for the short range behavior are presented. For these frequencies the computed mode coupling rates are extremely small, and the propagation is strongly adiabatic with a rapid decay of cross-mode coherence. Coupling effects are predicted to be important at kilohertz frequencies. Decay of cross-mode coherence has important implications for acoustic interactions with nonlinear internal waves: For the case in which the acoustic path is not at glancing incidence wi...Continue Reading

References

Jan 21, 2000·The Journal of the Acoustical Society of America·R H HeadrickD Tielbuerger
Sep 29, 2006·The Journal of the Acoustical Society of America·Daniel Rouseff, Dajun Tang
Mar 14, 2007·The Journal of the Acoustical Society of America·John R ApelJames F Lynch
Dec 3, 2008·The Journal of the Acoustical Society of America·James Lynch, Dajun Tang
Jan 29, 2009·The Journal of the Acoustical Society of America·A G Voronovich, V E Ostashev
Sep 11, 2009·The Journal of the Acoustical Society of America·John A Colosi, Andrey K Morozov
Feb 23, 2012·The Journal of the Acoustical Society of America·John A ColosiBruce D Cornuelle

❮ Previous
Next ❯

Citations

Oct 15, 2013·The Journal of the Acoustical Society of America·Tarun K ChandrayadulaBruce M Howe
Jul 6, 2014·The Journal of the Acoustical Society of America·Kaustubha Raghukumar, John A Colosi
Jul 6, 2014·The Journal of the Acoustical Society of America·Benjamin A JonesTimothy K Stanton
Oct 3, 2015·The Journal of the Acoustical Society of America·Andrey K Morozov, John A Colosi
May 23, 2015·The Journal of the Acoustical Society of America·Kaustubha Raghukumar, John A Colosi
Apr 30, 2015·The Journal of the Acoustical Society of America·A L Virovlyansky
Feb 23, 2012·The Journal of the Acoustical Society of America·John A ColosiBruce D Cornuelle
Aug 3, 2019·The Journal of the Acoustical Society of America·Laure DumazGuilhem Lepoultier

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.