VHF radar observations of convectively generated gravity waves: Some new insights

2006 ◽  
Vol 33 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Karanam Kishore Kumar
Keyword(s):  
Gravity Waves ◽  
Vhf Radar ◽  
Radar Observations

Eiscat vhf radar observations of periodic mesopause echoes

1988 ◽  
Vol 36 (4) ◽  
pp. 423-428 ◽  
Author(s):  
H Rishbeth ◽  
AP van Eyken ◽  
B S Lanchester ◽  
T Turunen ◽  
J Röttger ◽  
...  
Keyword(s):  
Vhf Radar ◽  
Radar Observations

scholarly journals Convective Instability Underneath Midlevel Clouds: Comparisons between Numerical Simulations and VHF Radar Observations

2015 ◽  
Vol 54 (11) ◽  
pp. 2217-2227 ◽  
Author(s):  
Atsushi Kudo ◽  
Hubert Luce ◽  
Hiroyuki Hashiguchi ◽  
Richard Wilson
Keyword(s):  
Numerical Simulations ◽  
Initial Conditions ◽  
Radiosonde Data ◽  
Cloud Base ◽  
Very High Frequency ◽  
Vhf Radar ◽  
Turbulent Layer ◽  
Radar Observations ◽  
Mu Radar ◽  
Upper Level

AbstractDeep turbulent layers can sometimes be observed on the underside of clouds that extend above upper-level frontal zones. In a recent study based on 3D numerical simulations with idealized initial conditions, it was found that midlevel cloud-base turbulence (MCT) can result from Rayleigh–Bénard-like convection as a result of cooling by sublimation of precipitating snow into dry and weakly stratified subcloud layers. In the present study, numerically simulated MCT was compared with a turbulent layer detected by the very high-frequency (VHF) middle- and upper-atmosphere (MU) radar during the passage of an upper-level front topped by clouds. The simulations were initialized with thermodynamic parameters derived from simultaneous radiosonde data. It was found that some important features of the simulated MCT (such as the scale of convection and vertical wind velocity perturbations) agreed quantitatively well with those reported in radar observations. Even if the possibility of other generation mechanisms cannot be ruled out, the good agreement strongly suggests that the MU radar actually detected MCT.

Evidence of kilometer-scale waves in the lower E region from high resolution VHF radar observations over Gadanki

2002 ◽  
Vol 29 (10) ◽  
pp. 137-1-137-4 ◽  
Author(s):  
A. K. Patra ◽  
S. Sripathi ◽  
V. Siva Kumar ◽  
P. B. Rao
Keyword(s):  
High Resolution ◽  
Vhf Radar ◽  
Radar Observations ◽  
E Region
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