scholarly journals Atmospheric Gravity Wave Science in the Polar Regions

Eos ◽  
2019 ◽  
Vol 100 ◽  
Author(s):  
Tracy Moffat-Griffin ◽  
Mike Taylor ◽  
Takuji Nakamura ◽  
Damian Murphy ◽  
Jose Bageston ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Polar Regions ◽  
Special Issue ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity Waves ◽  
Global Circulation ◽  
Atmospheric Gravity

A joint special issue explores the potential of collaboration to help understand atmospheric gravity waves in the Polar Regions and their effect on global circulation.

scholarly journals Spectral variability in high frequency in sea level and atmospheric pressure on Buenos Aires Coast, Argentina

2017 ◽  
Vol 65 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Iael Perez ◽  
Dragani Walter
Keyword(s):  
Gravity Waves ◽  
Atmospheric Pressure ◽  
Buenos Aires ◽  
Numerical Models ◽  
Spectral Energy ◽  
Spectral Variability ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity Waves ◽  
Atmospheric Gravity ◽  
Low Activity

Abstract There are some observational evidences which support that atmospheric gravity waves constitute an efficient forcing for meteorological tsunamis (meteotsunamis) along the coast of Buenos Aires, Argentina. Meteotsunamis and atmospheric gravity waves, which propagate simultaneously on the sea surface and the atmosphere, respectively, are typical examples of non-stationary geophysical signals. The variability of meteotsunamis and atmospheric gravity waves recorded at Mar del Plata was investigated in this paper. Results obtained in this work reinforce the idea of a cause (atmospheric gravity waves) effect (meteotsunami) relationship, because wavelet spectra obtained from both signals resulted quite similar. However, several very short episodes of mod-erate/low activity of atmospheric gravity waves were detected without detecting meteotsunami activity. On the other hand, it was found that atmospheric gravity wave spectral energy can appear in the wavelets as a single or multiple burst as relatively long and irregular events or as regular wave packets. Results obtained in this paper provide original spectral data about atmospheric gravity waves along the coast of Buenos Aires. This information is useful to be included in realistic numerical models in order to investigate the genesis of this complex atmosphere-ocean interaction.

scholarly journals A review of atmospheric gravity waves and travelling ionospheric disturbances: 1982-1995

1996 ◽  
Vol 14 (9) ◽  
pp. 917-940 ◽  
Author(s):  
K. Hocke ◽  
K. Schlegel
Keyword(s):  
Gravity Waves ◽  
Ionospheric Disturbances ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity Waves ◽  
Travelling Ionospheric Disturbances ◽  
The Past ◽  
Low Latitudes ◽  
Subsequent Propagation ◽  
Atmospheric Gravity ◽  
Inversion Techniques

Abstract. Recent investigations of atmospheric gravity waves (AGW) and travelling ionospheric disturbances (TID) in the Earth\\'s thermosphere and ionosphere are reviewed. In the past decade, the generation of gravity waves at high latitudes and their subsequent propagation to low latitudes have been studied by several global model simulations and coordinated observation campaigns such as the Worldwide Atmospheric Gravity-wave Study (WAGS), the results are presented in the first part of the review. The second part describes the progress towards understanding the AGW/TID characteristics. It points to the AGW/TID relationship which has been recently revealed with the aid of model-data comparisons and by the application of new inversion techniques. We describe the morphology and climatology of gravity waves and their ionospheric manifestations, TIDs, from numerous new observations.

scholarly journals Studies on atmospheric gravity wave activity in the troposphere and lower stratosphere over a tropical station at Gadanki

2005 ◽  
Vol 23 (10) ◽  
pp. 3237-3260 ◽  
Author(s):  
I. V. Subba Reddy ◽  
D. Narayana Rao ◽  
A. Narendra Babu ◽  
M. Venkat Ratnam ◽  
P. Kishore ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Lower Stratosphere ◽  
Wave Length ◽  
Wave Activity ◽  
Lower Atmosphere ◽  
Wind Fields ◽  
Atmospheric Gravity Wave ◽  
Short Period ◽  
Atmospheric Gravity

Abstract. MST radars are powerful tools to study the mesosphere, stratosphere and troposphere and have made considerable contributions to the studies of the dynamics of the upper, middle and lower atmosphere. Atmospheric gravity waves play a significant role in controlling middle and upper atmospheric dynamics. To date, frontal systems, convection, wind shear and topography have been thought to be the sources of gravity waves in the troposphere. All these studies pointed out that it is very essential to understand the generation, propagation and climatology of gravity waves. In this regard, several campaigns using Indian MST Radar observations have been carried out to explore the gravity wave activity over Gadanki in the troposphere and the lower stratosphere. The signatures of the gravity waves in the wind fields have been studied in four seasons viz., summer, monsoon, post-monsoon and winter. The large wind fluctuations were more prominent above 10 km during the summer and monsoon seasons. The wave periods are ranging from 10 min-175 min. The power spectral densities of gravity waves are found to be maximum in the stratospheric region. The vertical wavelength and the propagation direction of gravity waves were determined using hodograph analysis. The results show both down ward and upward propagating waves with a maximum vertical wave length of 3.3 km. The gravity wave associated momentum fluxes show that long period gravity waves carry more momentum flux than the short period waves and this is presented.

Response of GPS occultation signals to atmospheric gravity waves and retrieval of gravity wave parameters

GPS Solutions ◽  
2004 ◽  
Vol 8 (2) ◽  
Author(s):  
Y.A. Liou ◽  
A.G. Pavelyev ◽  
J. Wickert ◽  
C.Y. Huang ◽  
S.K. Yan ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Atmospheric Gravity Waves ◽  
Wave Parameters ◽  
Atmospheric Gravity ◽  
Gps Occultation

scholarly journals Atmospheric Gravity Wave Production for the Australian Total Solar Eclipse of 23 October 1976

1979 ◽  
Vol 32 (3) ◽  
pp. 287
Author(s):  
SM Ball
Keyword(s):  
Gravity Wave ◽  
Western Australia ◽  
Gravity Waves ◽  
Solar Eclipse ◽  
Internal Gravity Waves ◽  
Total Solar Eclipse ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

Calculations are presented which suggest that internal gravity waves generated by the 23 October 1976 total solar eclipse would have come to a focus in a region well north of Australia, and also in Antarctica. No evidence is found for a focus in Western Australia, as suggested by Beer et al. (1976).

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