Seasonal presence of cetaceans and ambient noise levels in polar waters of the North Atlantic

2012 ◽  
Vol 132 (3) ◽  
pp. EL176-EL181 ◽  
Author(s):  
Holger Klinck ◽  
Sharon L. Nieukirk ◽  
David K. Mellinger ◽  
Karolin Klinck ◽  
Haruyoshi Matsumoto ◽  
...  
Keyword(s):  
North Atlantic ◽  
Ambient Noise ◽  
Noise Levels ◽  
The North ◽  
The North Atlantic

Seasonal ambient noise levels and impacts on communication in the North Atlantic right whale

2006 ◽  
Vol 120 (5) ◽  
pp. 3266-3266
Author(s):  
Susan E. Parks ◽  
Christopher W. Clark ◽  
Kathryn A. Cortopassi ◽  
Dimitri Ponirakis
Keyword(s):  
North Atlantic ◽  
Ambient Noise ◽  
Noise Levels ◽  
North Atlantic Right Whale ◽  
Right Whale ◽  
The North ◽  
The North Atlantic

Ocean ambient noise in the North Atlantic during 1966 and 2013–2014

2014 ◽  
Vol 136 (4) ◽  
pp. 2148-2149
Author(s):  
Ana Sirovic ◽  
Sean M. Wiggins ◽  
John A. Hildebrand ◽  
Mark A. McDonald
Keyword(s):  
North Atlantic ◽  
Ambient Noise ◽  
The North ◽  
The North Atlantic

Ambient noise surface wave inversion using OBS data from the north Atlantic, north of the Gloria fault.

2021 ◽  
Author(s):  
Juan Pinzon ◽  
Susana Custódio ◽  
Graça Silveira ◽  
Luis Matias ◽  
Frank Krüger
Keyword(s):  
North Atlantic ◽  
Ambient Noise ◽  
Velocity Structure ◽  
Water Layer ◽  
Strike Slip ◽  
S Wave ◽  
Phase Velocities ◽  
The North ◽  
The North Atlantic ◽  
Group And Phase Velocities

<p>The Gloria fault is a strike-slip oceanic plate boundary fault, which has remained poorly studied due mostly to its remote location in the north Atlantic Ocean. The fault has hosted some of the largest strike-slip earthquakes in the oceanic domain, notably the 1941 M8.3 and the 1975 M8.1 earthquakes, and generating tsunamis is the surrounding areas.</p><p>The seismic data used for this study was recorded by 12 broadband ocean bottom seismometers (OBSs) located about 100 km north of the Gloria fault during a 10-month experiment. The dataset has been used before to image crustal and mantle discontinuities using receiver function analysis and to infer the S-wave velocity structure of the oceanic lithosphere north of the Gloria fault from P-wave polarization. These studies indicate a slight crustal thickening towards the Gloria fault, as well as an increase in uppermost mantle S-wave velocities towards the fault.</p><p>In this study, we use ambient noise surface wave tomography to find the velocity structure beneath the OBS deployment. First, we present a 1D shear-velocity model obtained from inversion of the average fundamental mode Rayleigh and Love wave group and phase velocities. In addition, the hydrophone is also used to better constrain the inversion at shallow depths, because the hydrophone shows a clear fundamental mode without interference of the first higher mode. Because of the short interstation distances of the array, it is not possible to extract the dispersion curves at periods longer than ~16 s. To compute the Vs inversions, we used the code SURF96 (Herrmann and Ammon, 2004) and consider a water layer in the initial model for Rayleigh waves, because these waves are affected by the water layer. Our results show an upper mantle low-velocity zone, which may be related to serpentinization due to the proximity of the Gloria Fault. Finally, we present the lateral variations of group and phase velocities, as a function of period obtained using FMST (Rawlinson and Sambridge, 2005), which show strong contrast velocity anomalies at the center of the array at short periods (shallow depths).</p><p>The authors acknowledge support from the Portuguese FCT – Fundação para a Ciência e a Tecnologia, I.P., within the scope of project UTAP-EXPL/EAC/0056/2017 and with the FCT grant PD/BD/135069/2017 - IDL.</p>

The Currents of the North Atlantic

1892 ◽  
Vol 34 (872supp) ◽  
pp. 13940-13941
Author(s):  
Richard Beynon
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic

Power-feed equipment for the North Atlantic link

1957 ◽  
Vol 104 (4S) ◽  
pp. 51-59
Author(s):  
G.W. Meszaros ◽  
H.H. Spencer
Keyword(s):  
North Atlantic ◽  
The North ◽  
The North Atlantic

NATO adaptation to current challenges and mechanisms of Ukraine’s cooperation with the North Atlantic Treaty Organization

2019 ◽  
pp. 73-81
Author(s):  
Oleh Poshedin
Keyword(s):  
North Atlantic ◽  
Task Force ◽  
Response Force ◽  
Cyber Attack ◽  
Adaptation Measures ◽  
Joint Force ◽  
Security Environment ◽  
The North ◽  
The North Atlantic ◽  
Area Of Influence

The purpose of the article is to describe the changes NATO undergoing in response to the challenges of our time. Today NATO, as a key element of European and Euro-Atlantic security, is adapting to changes in the modern security environment by increasing its readiness and ability to respond to any threat. Adaptation measures include the components required to ensure that the Alliance can fully address the security challenges it might face. Responsiveness NATO Response Force enhanced by developing force packages that are able to move rapidly and respond to potential challenges and threats. As part of it, was established a Very High Readiness Joint Task Force, a new Allied joint force that deploy within a few days to respond to challenges that arise, particularly at the periphery of NATO’s territory. NATO emphasizes, that cyber defence is part of NATO’s core task of collective defence. A decision as to when a cyber attack would lead to the invocation of Article 5 would be taken by the North Atlantic Council on a case-by-case basis. Cooperation with NATO already contributes to the implementation of national security and defense in state policy. At the same time, taking into account that all decision-making in NATO based on consensus, Ukraine’s membership in the Alliance quite vague perspective. In such circumstances, in Ukraine you often can hear the idea of announcement of a neutral status. It is worth reminding that non-aligned status did not save Ukraine from Russian aggression. Neutral status will not accomplish it either. All talks about neutrality and the impossibility of Ukraine joining NATO are nothing but manipulations, as well as recognition of the Ukrainian territory as Russian Federation area of influence (this country seeks to sabotage the Euro-Atlantic movement of Ukraine). Think about it, Moldova’s Neutrality is enshrined in the country’s Constitution since 1994. However, this did not help Moldova to restore its territorial integrity and to force Russia to withdraw its troops and armaments from Transnistria.

Traits structure copepod niches in the North Atlantic and Southern Ocean

2018 ◽  
Vol 601 ◽  
pp. 109-126 ◽  
Author(s):  
N McGinty ◽  
AD Barton ◽  
NR Record ◽  
ZV Finkel ◽  
AJ Irwin
Keyword(s):  
Southern Ocean ◽  
North Atlantic ◽  
The North ◽  
The North Atlantic
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