scholarly journals Atmospheric gravity wave effects on polar mesospheric clouds: A comparison of numerical simulations from CARMA 2D with AIM observations

2012 ◽  
Vol 117 (D20) ◽  
Author(s):  
A. Chandran ◽  
D. W. Rusch ◽  
G. E. Thomas ◽  
S. E. Palo ◽  
G. Baumgarten ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Gravity Wave ◽  
Atmospheric Gravity Wave ◽  
Polar Mesospheric Clouds ◽  
Wave Effects ◽  
Mesospheric Clouds ◽  
Atmospheric Gravity

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 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

COnstraining ORographic Drag Effects (COORDE): A model intercomparison of resolved and parametrized orographic drag

2020 ◽  
Author(s):  
Annelize VanNiekerk ◽  
Irina Sandu
Keyword(s):  
Gravity Wave ◽  
Complex Terrain ◽  
Spatial Scales ◽  
Wave Drag ◽  
Large Spread ◽  
Numerical Experimentation ◽  
Wave Effects ◽  
Atmospheric Gravity ◽  
The Impact ◽  
Orographic Drag

<p>Mountains are know to impact the atmospheric circulation on a variety of spatial scales and through a number of different processes. They exert a drag force on the atmosphere both locally through deflection of the flow and remotely through the generation of atmospheric gravity waves. The degree to which orographic drag parametrizations are able to capture the complex impacts on the circulation from realistic orography in high resolution simulations is examined here. We present results from COnstraing ORographic Drag Effects (COORDE), a project joint with the Working Group on Numerical Experimentation (WGNE) and Global Atmospheric System Studies (GASS). The aim of COORDE is to validate parametrized orographic drag in several operational models in order to determine both systematic and model dependent errors over complex terrain. To do this, we compare the effects of parametrized orographic drag on the circulation with those of the resolved orographic drag, deduced from km-scale resolution simulations which are able to resolve orographic low-level blocking and gravity-wave effects. We show that there is a large spread in the impact from parametrized orographic drag between the models but that the impact from resolved orography is much more robust. This is encouraging as it means that the km-scale simulations can be used to evaluate the caveats of the existing orographic drag parametrizations. Analysis of the parametrized drag tendencies and stresses shows that much of the spread in the parametrized orographic drag comes from differences in the partitioning of the drag into turbulent and flow blocking drag near the surface. What is more, much of the model error over complex terrain can be attributed to deficiencies in the parametrized orographic drag, particularly coming from the orographic gravity wave drag.</p>

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