scholarly journals Investigation of a mesospheric gravity wave ducting event using coordinated sodium lidar and Mesospheric Temperature Mapper measurements at ALOMAR, Norway (69°N)

2014 ◽  
Vol 119 (16) ◽  
pp. 9765-9778 ◽  
Author(s):  
Katrina Bossert ◽  
David C. Fritts ◽  
Pierre-Dominique Pautet ◽  
Michael J. Taylor ◽  
Bifford P. Williams ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Mesospheric Temperature ◽  
Wave Ducting

scholarly journals Influence of gravity waves and tides on mesospheric temperature inversion layers: simultaneous Rayleigh lidar and MF radar observations

2008 ◽  
Vol 26 (12) ◽  
pp. 3731-3739 ◽  
Author(s):  
S. Sridharan ◽  
S. Sathishkumar ◽  
S. Gurubaran
Keyword(s):  
Gravity Wave ◽  
Wave Interaction ◽  
Temperature Inversion ◽  
Lapse Rate ◽  
Wave Interactions ◽  
Tidal Gravity ◽  
Mesospheric Temperature ◽  
Wind Measurements ◽  
Rayleigh Lidar ◽  
Mf Radar

Abstract. Three nights of simultaneous Rayleigh lidar temperature measurements over Gadanki (13.5° N, 79.2° E) and medium frequency (MF) radar wind measurements over Tirunelveli (8.7° N, 77.8° E) have been analyzed to illustrate the possible effects due to tidal-gravity wave interactions on upper mesospheric inversion layers. The occurrence of tidal gravity wave interaction is investigated using MF radar wind measurements in the altitude region 86–90 km. Of the three nights, it is found that tidal gravity wave interaction occurred in two nights. In the third night, diurnal tidal amplitude is found to be significantly larger. As suggested in Sica et al. (2007), mesospheric temperature inversion seems to be a signature of wave saturation in the mesosphere, since the temperature inversion occurs at heights, when the lapse rate is less than half the dry adiabatic lapse rate.

scholarly journals Dynamical Control of the Mesosphere by Orographic and Nonorographic Gravity Wave Drag during the Extended Northern Winters of 2006 and 2009

2013 ◽  
Vol 70 (7) ◽  
pp. 2152-2169 ◽  
Author(s):  
Charles McLandress ◽  
John F. Scinocca ◽  
Theodore G. Shepherd ◽  
M. Catherine Reader ◽  
Gloria L. Manney
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Middle Atmosphere ◽  
Wave Drag ◽  
Reanalysis Data ◽  
Zonal Winds ◽  
Mesospheric Temperature ◽  
Mean Circulation ◽  
Dynamical Control ◽  
Good Agreement

Abstract A version of the Canadian Middle Atmosphere Model (CMAM) that is nudged toward reanalysis data up to 1 hPa is used to examine the impacts of parameterized orographic and nonorographic gravity wave drag (OGWD and NGWD) on the zonal-mean circulation of the mesosphere during the extended northern winters of 2006 and 2009 when there were two large stratospheric sudden warmings. The simulations are compared to Aura Microwave Limb Sounder (MLS) observations of mesospheric temperature and carbon monoxide (CO) and derived zonal winds. The control simulation, which uses both OGWD and NGWD, is shown to be in good agreement with MLS. The impacts of OGWD and NGWD are assessed using simulations in which those sources of wave drag are removed. In the absence of OGWD the mesospheric zonal winds in the months preceding the warmings are too strong, causing increased mesospheric NGWD, which drives excessive downwelling, resulting in overly large lower-mesospheric values of CO prior to the warming. NGWD is found to be most important following the warmings when the underlying westerlies are too weak to allow much vertical propagation of the orographic gravity waves to the mesosphere. NGWD is primarily responsible for driving the circulation that results in the descent of CO from the thermosphere following the warmings. Zonal-mean mesospheric winds and temperatures in all simulations are shown to be strongly constrained by (i.e., slaved to) the stratosphere. Finally, it is demonstrated that the responses to OGWD and NGWD are nonadditive because of their dependence and influence on the background winds and temperatures.

scholarly journals Evidence of gravity wave ducting in the mesopause region from airglow network observations

2013 ◽  
Vol 40 (3) ◽  
pp. 601-605 ◽  
Author(s):  
S. Suzuki ◽  
K. Shiokawa ◽  
Y. Otsuka ◽  
S. Kawamura ◽  
Y. Murayama
Keyword(s):  
Gravity Wave ◽  
Mesopause Region ◽  
Wave Ducting

Gravity Wave Ducting Observed in the Mesosphere Over Jicamarca, Peru

2019 ◽  
Vol 124 (10) ◽  
pp. 5166-5177 ◽  
Author(s):  
Gerald A. Lehmacher ◽  
Erhan Kudeki ◽  
Pablo M. Reyes ◽  
Kiwook Lee ◽  
Christopher J. Heale ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Wave Ducting
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