scholarly journals Long-Wave Generation due to Atmospheric-Pressure Variation and Harbor Oscillation in Harbors of Various Shapes and Countermeasures against Meteotsunamis

2019 ◽  
Author(s):  
Taro Kakinuma
Keyword(s):  
Atmospheric Pressure ◽  
Wave Generation ◽  
Pressure Variation ◽  
Long Wave

scholarly journals A NUMERICAL STUDY ON LONG-WAVE GENERATION DUE TO ATMOSPHERIC-PRESSURE VARIATION

2012 ◽  
Vol 1 (33) ◽  
pp. 17
Author(s):  
Taro Kakinuma ◽  
Kosuke Fukita
Keyword(s):  
Atmospheric Pressure ◽  
Numerical Study ◽  
Okinawa Trough ◽  
Grid Point ◽  
Pressure Profile ◽  
Pressure Variation ◽  
Long Waves ◽  
Pressure Waves ◽  
Oscillation System ◽  
Long Wave

The generation and propagation of long waves due to atmospheric-pressure variation have been numerically simulated, where the atmospheric-pressure waves are assumed to travel in the eastern direction over East Chine Sea. The wave height of long waves is larger as the moving velocity of the recovery point of water surface pressed by the atmospheric pressure is close to the long-wave celerity. Before attenuation of the harbor oscillation in Urauchi Bay, Kamikoshiki Island, the incidence of long waves can continue because of the oscillation system generated between the main island of Kyushu and Okinawa Trough. The pressure profiles of atmospheric-pressure waves supposed to have concerned the large harbor oscillation in Urauchi Bay from 2009 to 2010 are classified into four patterns based on the Grid Point Value pressure data. The incident long waves causing the largest harbor oscillation in Urauchi Bay on Feb. 25, 2009 has been simulated with the estimated pressure-profile pattern, such that the largest harbor oscillation in Urauchi Bay should occur due to the atmospheric-pressure waves.

Fiscal measurement and the effects of atmospheric pressure variation: Small deviations and large risks

2021 ◽  
pp. 102027
Author(s):  
Carlos Eduardo R.B. Barateiro ◽  
Claudio Makarovsky ◽  
Jorge Gomez Sanchez ◽  
José Rodrigues de Farias Filho ◽  
Alexandre do Valle Faria
Keyword(s):  
Atmospheric Pressure ◽  
Pressure Variation ◽  
Small Deviations

Prediction of pressure-generated earth motion using optimum filters

1975 ◽  
Vol 65 (3) ◽  
pp. 637-650
Author(s):  
E. J. Douze ◽  
G. G. Sorrells
Keyword(s):  
Atmospheric Pressure ◽  
Acoustic Waves ◽  
Background Noise ◽  
Single Channel ◽  
Pressure Variation ◽  
Long Period ◽  
System A ◽  
The Earth ◽  
Multichannel Filtering ◽  
Time Trace

abstract The performance of long-period seismographs is often seriously degraded by atmospheric pressure variation; the problem is particularly severe at periods greater than 20 sec. The pressure variations associated with wind-generated turbulence and acoustic waves are sufficient to deform the surface of the Earth, thus adding to the background noise level recorded by the seismometer. If microbarographs are operated together with the seismograph system, a large percentage of the atmospherically generated noise can be eliminated by the use of optimum filters. The filters are designed based on the least-mean-squares criterion, with the seismograph time trace as the desired output and the microbarographs as the inputs. Single-channel filters, using only one microbarograph, located at the seismometer vault are used to attenuate wind-generated noise. In order to attenuate the noise on windless days from other pressure sources, multichannel filtering is usually necessary and therefore an array of microbarographs is required. The filters used to predict the wind-generated noise are shown to be stable despite the complicated source. The performance of the multichannel varies widely depending on the structure of pressure variations predominating in the atmosphere.

Atmospheric Pressure Variation and the Climate of Mars

1973 ◽  
Vol 30 (8) ◽  
pp. 1502-1508 ◽  
Author(s):  
Peter J. Gierasch ◽  
Owen B. Toon
Keyword(s):  
Atmospheric Pressure ◽  
Pressure Variation

scholarly journals Long Wave Generation Induced by Differences in the Wave‐Group Structure

2018 ◽  
Vol 123 (12) ◽  
pp. 8921-8940 ◽  
Author(s):  
Enrique M. Padilla ◽  
Jose M. Alsina
Keyword(s):  
Group Structure ◽  
Wave Generation ◽  
Wave Group ◽  
Long Wave

scholarly journals Pneumatic long-wave generation of tsunami-length waveforms and their runup

2018 ◽  
Vol 138 ◽  
pp. 80-97 ◽  
Author(s):  
D.J. McGovern ◽  
T. Robinson ◽  
I.D. Chandler ◽  
W. Allsop ◽  
T. Rossetto
Keyword(s):  
Wave Generation ◽  
Long Wave
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