Sound propagation from the Canadian Basin to the Chukchi shelf during Summer 2015

2016 ◽  
Vol 139 (4) ◽  
pp. 2198-2198
Author(s):  
Mohsen Badiey ◽  
Justin Eickmeier ◽  
Andreas Muenchow ◽  
Y T. Lin ◽  
Timothy Duda ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Canadian Basin ◽  
Chukchi Shelf

A year-long record of low-frequency, long-range, ducted sound propagation from the Canada Basin to the Chukchi Shelf

2018 ◽  
Vol 144 (3) ◽  
pp. 1666-1666
Author(s):  
Megan S. Ballard ◽  
Jason D. Sagers ◽  
Mohsen Badiey ◽  
John A. Colosi ◽  
Altan Turgut ◽  
...  
Keyword(s):  
Long Range ◽  
Sound Propagation ◽  
Low Frequency ◽  
Canada Basin ◽  
Chukchi Shelf

scholarly journals Temporal and spatial dependence of a yearlong record of sound propagation from the Canada Basin to the Chukchi Shelf

2020 ◽  
Vol 148 (3) ◽  
pp. 1663-1680
Author(s):  
Megan S. Ballard ◽  
Mohsen Badiey ◽  
Jason D. Sagers ◽  
John A. Colosi ◽  
Altan Turgut ◽  
...  
Keyword(s):  
Spatial Dependence ◽  
Sound Propagation ◽  
Canada Basin ◽  
Temporal And Spatial ◽  
Chukchi Shelf

Acoustic propagation from the Canadian Basin to the Chukchi Shelf

2017 ◽  
Vol 142 (4) ◽  
pp. 2713-2713 ◽  
Author(s):  
Megan S. Ballard ◽  
Jason D. Sagers ◽  
Ying-Tsong Lin ◽  
Mohsen Badiey ◽  
Peter F. Worcester ◽  
...  
Keyword(s):  
Acoustic Propagation ◽  
Canadian Basin ◽  
Chukchi Shelf

scholarly journals Temporal and spatial dependence of a yearlong record of sound propagation from the Canada Basin to the Chukchi Shelf

2019 ◽  
Vol 145 (3) ◽  
pp. 1803-1803
Author(s):  
Megan S. Ballard ◽  
Jason D. Sagers ◽  
Mohsen Badiey ◽  
John A. Colosi ◽  
Altan Turgut ◽  
...  
Keyword(s):  
Spatial Dependence ◽  
Sound Propagation ◽  
Canada Basin ◽  
Temporal And Spatial ◽  
Chukchi Shelf

scholarly journals Phytoplankton distribution in the Western Arctic Ocean during a summer of exceptional ice retreat

2011 ◽  
Vol 8 (4) ◽  
pp. 6919-6970 ◽  
Author(s):  
P. Coupel ◽  
H. Y. Jin ◽  
D. Ruiz-Pino ◽  
J. F. Chen ◽  
S. H. Lee ◽  
...  
Keyword(s):  
Primary Production ◽  
Ice Melting ◽  
Phytoplankton Distribution ◽  
Pacific Waters ◽  
Phytoplankton Communities ◽  
Ice Retreat ◽  
Western Arctic ◽  
Canadian Basin ◽  
Chukchi Borderland ◽  
Chukchi Shelf

Abstract. A drastic ice decline in the Arctic Ocean, triggered by global warming, could generate rapid changes in the upper ocean layers. The ice retreat is particularly intense over the Canadian Basin where large ice free areas were observed since 2007. The CHINARE 2008 expedition was conducted in the Western Arctic (WA) ocean during a year of exceptional ice retreat (August–September 2008). This study investigates whether a significant reorganization of the primary producers in terms of species, biomass and productivity has to be observed in the WA as a result of the intense ice melting. Both pigments (HPLC) and taxonomy (microscopy) acquired in 2008 allowed to determine the phytoplanktonic distribution from Bering Strait (65° N) to extreme high latitudes over the Alpha Ridge (86° N) encompassing the Chukchi shelf, the Chukchi Borderland and the Canadian Basin. Two different types of phytoplankton communities were observed. Over the ice-free Chukchi shelf, relatively high chl-a concentrations (1–5 mg m−3) dominated by 80 % of diatoms. In the Canadian Basin, surface waters are oligotrophic (<0.1 mg m−3) and algal assemblages were dominated by haptophytes and diatoms while higher biomasses (~0.4 mg m−3) related to a deep Subsurface Chlorophyll Maximum (SCM) are associated to small-sized (nano and pico) phytoplankton. The ice melting onset allows to point out three different zones over the open basin: (i) the ice free condition characterized by deep and unproductive phytoplankton communities dominated by nanoplankton, (ii) an extended (78°–83° N) Active Melting Zone (AMZ) where light penetration associated to the stratification start off and enough nutrient availability drives to the highest biomass and primary production due to both diatoms and large flagellates, (iii) heavy ice conditions found north to 83° N allowing light limitation and consequently low biomass and primary production associated to pico and nanoplankton. To explain the poverty (Canadian Basin) and the richness (Chukchi shelf) of the WA, we explore the role of the nutrient-rich Pacific Waters, the bathymetry and two characteristics linked to the intense ice retreat: the stratification and the Surface Freshwater Layer (SFL). The freshwater accumulation induced a strong stratification limiting the nutrient input from the subsurface Pacific waters. This results in a biomass impoverishment of the well-lit layer and compels the phytoplankton to grow in subsurface. The phytoplankton distribution in the Chukchi Borderland and north Canadian Basin, during the summer of exceptional ice retreat (2008), suggested when compared to in-situ data from a more ice covered year (1994), recent changes with a decrease of the phytoplankton abundance while averaged biomass was similar. The 2008 obtained phytoplankton data in the WA provided a state of the ecosystem which will be useful to determine both past and future changes in relation with predicted sea ice decline.

Sound as a transverse wave

2017 ◽  
Vol 13 (1) ◽  
pp. 4522-4534
Author(s):  
Armando Tomás Canero
Keyword(s):  
Quantum Mechanics ◽  
Gravitational Waves ◽  
Longitudinal Wave ◽  
Transverse Wave ◽  
Sound Propagation ◽  
Correspondence Principle ◽  
Classical Mechanics ◽  
Wave Model ◽  
Scientific Experiments

This paper presents sound propagation based on a transverse wave model which does not collide with the interpretation of physical events based on the longitudinal wave model, but responds to the correspondence principle and allows interpreting a significant number of scientific experiments that do not follow the longitudinal wave model. Among the problems that are solved are: the interpretation of the location of nodes and antinodes in a Kundt tube of classical mechanics, the traslation of phonons in the vacuum interparticle of quantum mechanics and gravitational waves in relativistic mechanics.

Time-domain calculation of sound propagation in lined ducts with sheared flows

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 768-773 ◽  
Author(s):  
Yusuf Ozyoruk ◽  
Lyle N. Long
Keyword(s):  
Time Domain ◽  
Sound Propagation ◽  
Sheared Flows ◽  
Lined Ducts

A verified model of laser-generated sound propagation

1989 ◽  
Author(s):  
EDMOND LO ◽  
R. FERGUSON ◽  
MICHAEL FRISH ◽  
PETERE. NEBOLSINE
Keyword(s):  
Sound Propagation
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