scholarly journals Improvement in the technique to extract gravity wave parameters from lidar data

2008 ◽  
Vol 113 (D19) ◽  
Author(s):  
Guotao Yang ◽  
Barclay Clemesha ◽  
Paulo Batista ◽  
Dale Simonich
Keyword(s):  
Gravity Wave ◽  
Lidar Data ◽  
Wave Parameters

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 A statistical study of gravity waves from radiosonde observations at Wuhan (30° N, 114° E) China

2005 ◽  
Vol 23 (3) ◽  
pp. 665-673 ◽  
Author(s):  
S. D. Zhang ◽  
F. Yi
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Extreme Values ◽  
Dynamical Instability ◽  
Strong Wind ◽  
Data Set ◽  
Height Range ◽  
Wave Parameters ◽  
Thermal Structures ◽  
Radiosonde Observation

Abstract. Several works concerning the dynamical and thermal structures and inertial gravity wave activities in the troposphere and lower stratosphere (TLS) from the radiosonde observation have been reported before, but these works were concentrated on either equatorial or polar regions. In this paper, background atmosphere and gravity wave activities in the TLS over Wuhan (30° N, 114° E) (a medium latitudinal region) were statistically studied by using the data from radiosonde observations on a twice daily basis at 08:00 and 20:00 LT in the period between 2000 and 2002. The monthly-averaged temperature and horizontal winds exhibit the essential dynamic and thermal structures of the background atmosphere. For avoiding the extreme values of background winds and temperature in the height range of 11-18km, we studied gravity waves, respectively, in two separate height regions, one is from ground surface to 10km (lower part), and the other is within 18-25km (upper part). In total, 791 and 1165 quasi-monochromatic inertial gravity waves were extracted from our data set for the lower and upper parts, respectively. The gravity wave parameters (intrinsic frequencies, amplitudes, wavelengths, intrinsic phase velocities and wave energies) are calculated and statistically studied. The statistical results revealed that in the lower part, there were 49.4% of gravity waves propagating upward, and the percentage was 76.4% in the upper part. Moreover, the average wave amplitudes and energies are less than those at the lower latitudinal regions, which indicates that the gravity wave parameters have a latitudinal dependence. The correlated temporal evolution of the monthly-averaged wave energies in the lower and upper parts and a subsequent quantitative analysis strongly suggested that at the observation site, dynamical instability (strong wind shear) induced by the tropospheric jet is the main excitation source of inertial gravity waves in the TLS.

scholarly journals Meteorological Source Variability in Atmospheric Gravity Wave Parameters Derived From a Tropical Infrasound Station

2019 ◽  
Vol 124 (8) ◽  
pp. 4352-4364
Author(s):  
G. J. Marlton ◽  
A. J. Charlton‐Perez ◽  
R. G. Harrison ◽  
E. Blanc ◽  
L. Evers ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Atmospheric Gravity Wave ◽  
Wave Parameters ◽  
Atmospheric Gravity

Statistical analysis of inertial gravity wave parameters in the lower stratosphere over Northern China

2018 ◽  
Vol 52 (1-2) ◽  
pp. 563-575 ◽  
Author(s):  
Lei Chen ◽  
Jianchun Bian ◽  
Yi Liu ◽  
Zhixuan Bai ◽  
Shuai Qiao
Keyword(s):  
Statistical Analysis ◽  
Gravity Wave ◽  
Lower Stratosphere ◽  
Northern China ◽  
Wave Parameters

scholarly journals Reconstruction of internal gravity wave parameters from radio occultation retrievals of vertical temperature profiles in the Earth's atmosphere

2011 ◽  
Vol 4 (10) ◽  
pp. 2153-2162 ◽  
Author(s):  
V. N. Gubenko ◽  
A. G. Pavelyev ◽  
R. R. Salimzyanov ◽  
A. A. Pavelyev
Keyword(s):  
Gravity Wave ◽  
Wind Velocity ◽  
Radio Occultation ◽  
Internal Gravity Wave ◽  
Shear Instability ◽  
Temperature Profiles ◽  
Vertical Temperature ◽  
Earth’S Atmosphere ◽  
Wave Parameters ◽  
Earth's Atmosphere

Abstract. A new method for the reconstruction of internal gravity wave (IGW) parameters from a single vertical temperature profile measurement in the Earth's atmosphere has been developed. This method does not require any additional information not contained in the profile and may be used for the analysis of profiles measured by various techniques. The criterion for the IGW identification has been formulated and argued. In the case when this criterion is satisfied, then analyzed temperature fluctuations can be considered as wave-induced. The method is based on the analysis of relative amplitude thresholds of the temperature wave field and on the linear IGW saturation theory in which amplitude thresholds are restricted by dynamical (shear) instability processes in the atmosphere. When the amplitude of an internal gravity wave reaches the shear instability limit, energy is assumed to be dissipated in such a way that the amplitude is maintained at the instability limit as the wave propagates upwards. In order to approbate the method we have used data of simultaneous high-resolution balloon measurements of the temperature and wind velocity in the Earth's stratosphere over France where a long-period inertia-gravity wave has been detected. Using the radiosonde temperature data only, we have reconstructed all wave parameters, which were determined by radiosondes, with relative deviations not larger than 30%. An application of the method to the radio occultation (RO) data has given the possibility to identify the IGWs in the Earth's stratosphere and to determine the magnitudes of key wave parameters such as the intrinsic frequency, amplitudes of vertical and horizontal perturbations of the wind velocity, vertical and horizontal wavelengths, intrinsic vertical and horizontal phase (and group) speeds, kinetic and potential energy, vertical fluxes of the wave energy and horizontal momentum. The obtained results of internal wave studies in the Earth's stratosphere deduced from the COSMIC and CHAMP GPS occultation temperature profiles are presented and discussed.

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