A photometer array for atmospheric gravity wave measurements on the Lower Atmosphere Ionosphere Coupling Experiment (LAICE) mission

2018 ◽  
Vol 89 (11) ◽  
pp. 113118
Author(s):  
C. P. Philbrick ◽  
J. Westerhoff ◽  
Z. Wang ◽  
S. Hall ◽  
G. R. Swenson
Keyword(s):  
Gravity Wave ◽  
Lower Atmosphere ◽  
Atmospheric Gravity Wave ◽  
Wave Measurements ◽  
Atmospheric Gravity ◽  
Coupling Experiment

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.

Atmospheric gravity wave production for the solar eclipse of October 23, 1976

Nature ◽  
1976 ◽  
Vol 264 (5585) ◽  
pp. 420-421 ◽  
Author(s):  
TOM BEER ◽  
G. L. GOODWIN ◽  
G. J. HOBSON
Keyword(s):  
Gravity Wave ◽  
Solar Eclipse ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

Calculating Atmospheric Gravity Wave Parameters from Infrasound Measurements

2018 ◽  
pp. 701-719 ◽  
Author(s):  
Graeme Marlton ◽  
Andrew Charlton-Perez ◽  
Giles Harrison ◽  
Christopher Lee
Keyword(s):  
Gravity Wave ◽  
Atmospheric Gravity Wave ◽  
Wave Parameters ◽  
Atmospheric Gravity

scholarly journals Tomographic reconstruction of atmospheric gravity wave parameters from airglow observations

2017 ◽  
Author(s):  
Rui Song ◽  
Martin Kaufmann ◽  
Jörn Ungermann ◽  
Manfred Ern ◽  
Guang Liu ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Tomographic Reconstruction ◽  
Lower Thermosphere ◽  
Real Data ◽  
Atmospheric Gravity Wave ◽  
Mesopause Region ◽  
Angle Measurements ◽  
Target Mode ◽  
Observation Strategy ◽  
Atmospheric Gravity

Abstract. Gravity waves (GWs) play an important role in atmospheric dynamics. Especially in the mesosphere and lower thermosphere (MLT) dissipating GWs provide a major contribution to the driving of the global wind system. Therefore global observations of GWs in the MLT region are of particular interest. The small scales of GWs, however, pose a major problem for the observation of GWs from space. We propose a new observation strategy for GWs in the mesopause region by combining limb and sub-limb satellite-borne remote sensing measurements for improving the spatial resolution of temperatures that are retrieved from atmospheric soundings. In our study, we simulate satellite observations of the rotational structure of the O2 A-band nightglow. A key element of the new method is the ability of the instrument or the satellite to operate in so called target mode, i.e. to stare at a particular point in the atmosphere and collect radiances at different viewing angles. These multi-angle measurements of a selected region allow for tomographic reconstruction of a 2-dimensional atmospheric state, in particular of gravity wave structures. As no real data is available, the feasibility of this tomographic retrieval is carried out with simulation data in this work. It shows that one major advantage of this observation strategy is that much smaller scale GWs can be observed. We derive a GW sensitivity function, and it is shown that target mode observations are able to capture GWs with horizontal wavelengths as short as ~ 50 km for a large range of vertical wavelengths. This is far better than the horizontal wavelength limit of 100–200 km obtained for conventional limb sounding.

scholarly journals Magnetospheric-Ionospheric-Lithospheric coupling model. Observations  during the August 5, 2018 Bayan Earthquake

2021 ◽  
Author(s):  
Mirko Piersanti ◽  
Massimo Materassi ◽  
Roberto Battiston ◽  
Vincenzo Carbone ◽  
Antonio Cicone ◽  
...  
Keyword(s):  
Human Life ◽  
Coupling Model ◽  
Lower Atmosphere ◽  
Quality Data ◽  
Atmospheric Gravity Wave ◽  
Instrumental Approach ◽  
The Moment ◽  
Short Term Prediction ◽  
Atmospheric Gravity ◽  
Quantitative Indicators

<p>The short-term prediction of earthquakes is an essential issue connected with human life protection and related social and economics matter. Recent papers have provided some evidence of the link between the lithosphere, lower atmosphere, and ionosphere, even though with marginal statistical evidence. The basic coupling hypothesized being via atmospheric gravity wave (AGW)/acoustic wave (AW) channel. In this work we analyse the scenario of the low latitude earthquake (Mw=6.9) occurred in Indonesia on August 5, 2018, through a multi-instrumental approach, using ground and satellites high quality data. As a result, we derive a new analytical lithospheric-atmospheric-ionospheric-magnetospheric coupling model with the aim to provide quantitative indicators to interpret the observations around 6 hours before and at the moment of the earthquake occurrence.</p>

scholarly journals Atmospheric gravity wave signatures in the infrared hydroxyl OH airglow

2000 ◽  
Vol 27 (1) ◽  
pp. 41-44 ◽  
Author(s):  
H. U. Frey ◽  
S. B. Mende ◽  
J. F. Arens ◽  
P. R. McCullough ◽  
G. R. Swenson
Keyword(s):  
Gravity Wave ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity

scholarly journals A fast-propagating, large-scale atmospheric gravity wave observed in the WAVE2004 campaign

2006 ◽  
Vol 111 (D21) ◽  
Author(s):  
Minoru Kubota ◽  
Seiji Kawamura ◽  
Makoto Abo ◽  
Yoshiko Koizumi ◽  
Yasuhiro Murayama ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Large Scale ◽  
Atmospheric Gravity Wave ◽  
Atmospheric Gravity
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