Peter F. Worcester
YOU?
Author Swipe
View article: Transmission loss of surface-reflected ray arrivals underneath seasonally varying sea ice in the Canada Basin during 2016–2017
Transmission loss of surface-reflected ray arrivals underneath seasonally varying sea ice in the Canada Basin during 2016–2017 Open
During the 2016–2017 Canada Basin Acoustic Propagation Experiment, an ocean acoustic tomography array with a radius of 150 km measured the impulse responses of the ocean every 4 hr at a variety of ranges and bearings using broadband signal…
View article: Using long-range transmissions in the Beaufort Gyre to test the sound-speed equation at high pressure and low temperature
Using long-range transmissions in the Beaufort Gyre to test the sound-speed equation at high pressure and low temperature Open
An ocean acoustic tomography array with a radius of 150 km was deployed in the central Beaufort Gyre during 2016–2017 for the Canada Basin Acoustic Propagation Experiment. Five 250-Hz transceivers were deployed in a pentagon, with a sixth …
View article: Acoustic travel-time variability observed on a 150-km radius tomographic array in the Canada Basin during 2016–2017
Acoustic travel-time variability observed on a 150-km radius tomographic array in the Canada Basin during 2016–2017 Open
The Arctic Ocean is undergoing dramatic changes in response to increasing atmospheric concentrations of greenhouse gases. The 2016–2017 Canada Basin Acoustic Propagation Experiment was conducted to assess the effects of the changes in the …
View article: Observations of the space/time scales of Beaufort sea acoustic duct variability and their impact on transmission loss via the mode interaction parameter
Observations of the space/time scales of Beaufort sea acoustic duct variability and their impact on transmission loss via the mode interaction parameter Open
The Beaufort duct (BD) is a subsurface sound channel in the western Arctic Ocean formed by cold Pacific Winter Water (PWW) sandwiched between warmer Pacific Summer Water (PSW) and Atlantic Water (AW). Sound waves can be trapped in this duc…
View article: Estimating Arctic Ocean Acoustic Travel Times Using an Earth System Model
Estimating Arctic Ocean Acoustic Travel Times Using an Earth System Model Open
The hydroacoustic environment of a rapidly warming Arctic Ocean will be impacted by interconnected changes in the physical environment and increased human activity. Previous acoustic calculations will need to be updated to reflect current …
View article: An automated framework for long-range acoustic positioning of autonomous underwater vehicles
An automated framework for long-range acoustic positioning of autonomous underwater vehicles Open
An automated method was developed to align underwater acoustic receptions at various depths and ranges to a single reference prediction of long range acoustic arrival structure as it evolves with range in order to determine source-receiver…
View article: Deliverable 3.16 Synthesis and technical recommendations
Deliverable 3.16 Synthesis and technical recommendations Open
This document provides a summary of sensors, platforms, and observing systems implemented during INTAROS field campaigns and presents technical recommendations based on experience gained from operating these components for collecting in si…
View article: Introduction to the special issue on ocean acoustics in the changing arctic
Introduction to the special issue on ocean acoustics in the changing arctic Open
This paper introduces the Special Issue of The Journal of the Acoustical Society of America on Ocean Acoustics in the Changing Arctic. The special issue includes papers on ocean (and in one case atmospheric) acoustics. Changes in both the …
View article: Envisioning a Global Multi-Purpose Ocean Acoustic Network
Envisioning a Global Multi-Purpose Ocean Acoustic Network Open
Due to the efficient propagation of sound in water, sound in the deep ocean propagates such great distances that soundscapes are influenced not only by local conditions but also by distant sound sources. Ocean Sound is now an Essential Oce…
View article: State Estimates and Forecasts of the Eddy Field in the Subtropical Countercurrent in the Northern Philippine Sea
State Estimates and Forecasts of the Eddy Field in the Subtropical Countercurrent in the Northern Philippine Sea Open
A strongly nonlinear eddy field is present in and around the subtropical countercurrent in the northern Philippine Sea (NPS). A regional implementation of the Massachusetts Institute of Technology General Circulation Model–Estimating the C…
View article: Observations of sound-speed fluctuations in the Beaufort Sea from summer 2016 to summer 2017
Observations of sound-speed fluctuations in the Beaufort Sea from summer 2016 to summer 2017 Open
Due to seasonal ice cover, acoustics can provide a unique means for Arctic undersea communication, navigation, and remote sensing. This study seeks to quantify the annual cycle of the thermohaline structure in the Beaufort Sea and characte…
View article: A seminal paper linking ocean acoustics and physical oceanography
A seminal paper linking ocean acoustics and physical oceanography Open
The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.
View article: Ocean acoustics in the changing Arctic
Ocean acoustics in the changing Arctic Open
Recent changes in ice cover and ocean stratification have been so large that acoustic measurements made during the Cold War no longer reflect current conditions.
View article: Temporal and spatial dependence of a yearlong record of sound propagation from the Canada Basin to the Chukchi Shelf
Temporal and spatial dependence of a yearlong record of sound propagation from the Canada Basin to the Chukchi Shelf Open
The Pacific Arctic Region has experienced decadal changes in atmospheric conditions, seasonal sea-ice coverage, and thermohaline structure that have consequences for underwater sound propagation. To better understand Arctic acoustics, a se…
View article: Deep ocean long range underwater navigation
Deep ocean long range underwater navigation Open
A long range Underwater Navigation Algorithm (UNA) is described that provides a geolocation underwater while submerged without having to surface for a Global Navigation Satellite System (GNSS) position. The UNA only uses measured acoustic …
View article: Implementation of a multipurpose Arctic Ocean Observing System
Implementation of a multipurpose Arctic Ocean Observing System Open
<p>The central Arctic Ocean is one of the least observed oceans in the world. This ice-covered region is challenging for ocean observing with respect to technology, logistics and costs. Many physical, biogeochemical, biological, and …
View article: The Future Arctic Ocean Observing System (F-AOOS)
The Future Arctic Ocean Observing System (F-AOOS) Open
International audience
View article: Preliminary results for glider localization in the Beaufort Duct using broadband acoustic sources at long range
Preliminary results for glider localization in the Beaufort Duct using broadband acoustic sources at long range Open
The relatively shallow sound speed minimum known as the Beaufort Duct, present during the Canada Basin Acoustic Propagation Experiment, enabled transmissions from acoustic sources moored within the duct to Seaglider receivers at ranges up …
View article: Observing the Oceans Acoustically
Observing the Oceans Acoustically Open
Acoustics play a central role in humankind’s interactions with the ocean and the life within. Passive listening to ocean “soundscapes” informs us about the physical and bio-acoustic environment from earthquakes to communication between fis…
View article: Observations of phase and intensity fluctuations for low-frequency, long-range transmissions in the Philippine Sea and comparisons to path-integral theory
Observations of phase and intensity fluctuations for low-frequency, long-range transmissions in the Philippine Sea and comparisons to path-integral theory Open
In the Philippine Sea, from April 2010 to March 2011, a 330-km radius pentagonal acoustic transceiver array with a sixth transceiver in the center transmitted broadband signals with center frequencies between 172 and 275 Hz and 100 Hz band…
View article: Rejoinder to: M.B. Kaplan, S. Solomon, A coming boom in commercial shipping? The potential for rapid growth of noise from commercial ships by 2030 [Mar. Policy 73 (Suppl. C) (2016) S119–S121]
Rejoinder to: M.B. Kaplan, S. Solomon, A coming boom in commercial shipping? The potential for rapid growth of noise from commercial ships by 2030 [Mar. Policy 73 (Suppl. C) (2016) S119–S121] Open
View article: A deep ocean acoustic noise floor, 1–800 Hz
A deep ocean acoustic noise floor, 1–800 Hz Open
The ocean acoustic noise floor (observed when the overhead wind is low, ships are distant, and marine life silent) has been measured on an array extending up 987 m from 5048 m depth in the eastern North Pacific, in what is one of only a fe…
View article: Observations of thermohaline sound-speed structure induced by internal waves and spice in the summer 2015 Canada Basin marginal ice zone
Observations of thermohaline sound-speed structure induced by internal waves and spice in the summer 2015 Canada Basin marginal ice zone Open
The Arctic seas are in a period of transition as they adjust to stimuli from anthropogenic climate change. The acoustic response to this adjustment is of fundamental interest, as acoustics provide an important means for Arctic remote sensi…
View article: Eddy properties in the Subtropical Countercurrent, Western Philippine Sea
Eddy properties in the Subtropical Countercurrent, Western Philippine Sea Open
View article: Vertical line array measurements of ambient noise in the North Pacific
Vertical line array measurements of ambient noise in the North Pacific Open
Shipping noise and wind are the dominant sources of ocean noise in the frequency band between 20 and 500 Hz. This paper analyzes noise in that band using data from the SPICEX experiment, which took place in the North Pacific in 2004–2005, …
View article: Resolution, identification, and stability of broadband acoustic arrivals in Fram Strait
Resolution, identification, and stability of broadband acoustic arrivals in Fram Strait Open
An ocean acoustic tomography system consisting of three moorings with low frequency, broadband transceivers and a moored receiver located approximately in the center of the triangle formed by the transceivers was installed in the central, …
View article: Eastern Arctic soundscape measured with a drifting vertical line array
Eastern Arctic soundscape measured with a drifting vertical line array Open
The soundscape in the eastern Arctic was studied from April to September 2013 using a 22 element vertical hydrophone array as it drifted from near the North Pole (89$^{\circ}$23'N, 62$^{\circ}$35'W) to north of Fram Strait (83$^{\circ}$45'…
View article: Eastern Arctic ambient noise on a drifting vertical array
Eastern Arctic ambient noise on a drifting vertical array Open
Ambient noise in the eastern Arctic was studied from April to September 2013 using a 22 element vertical hydrophone array as it drifted from 89$^\circ$23'N, 64$^\circ$35'W to 83$^\circ$45'N, 4$^\circ$28'W. The hydrophones recorded for 108 …
View article: Glider navigation using low-frequency acoustic sources in an open-water arctic environment with an eye towards glider navigation under ice
Glider navigation using low-frequency acoustic sources in an open-water arctic environment with an eye towards glider navigation under ice Open
View article: Identification and quantification of soundscape components in the Marginal Ice Zone
Identification and quantification of soundscape components in the Marginal Ice Zone Open
Acoustic experiments using an integrated ice station were carried out during August 2012 and September 2013 in the Marginal Ice Zone (MIZ) of Fram Strait. The two experiments lasted four days each and collected under-ice acoustic recording…