scholarly journals Zonal wind velocity profiles in the equatorial electrojet derived from phase velocities of type II radar echoes

2005 ◽  
Vol 110 (A12) ◽  
Author(s):  
E. B. Shume ◽  
D. L. Hysell ◽  
J. L. Chau
Keyword(s):  
Wind Velocity ◽  
Zonal Wind ◽  
Equatorial Electrojet ◽  
Velocity Profiles ◽  
Type Ii ◽  
Phase Velocities ◽  
Radar Echoes

On wind velocity profiles over urban area

2003 ◽  
Vol 20 (1/2/3/4/5/6) ◽  
pp. 196
Author(s):  
Klara Bezpalcova ◽  
Zbynek Janour ◽  
Viktor M.M. Prior ◽  
Cecilia Soriano ◽  
Michal Strizik
Keyword(s):  
Urban Area ◽  
Wind Velocity ◽  
Velocity Profiles

scholarly journals On the variability of the semidiurnal solar and lunar tides of the equatorial electrojet during sudden stratospheric warmings

2018 ◽  
Author(s):  
Tarique A. Siddiqui ◽  
Astrid Maute ◽  
Nick Pedatella ◽  
Yosuke Yamazaki ◽  
Hermann Lühr ◽  
...  
Keyword(s):  
Zonal Wind ◽  
Equatorial Electrojet ◽  
Stratospheric Warming ◽  
Tidal Amplitude ◽  
Lunar Tide ◽  
Sudden Stratospheric Warming ◽  
Lunar Tides ◽  
Neutral Temperature ◽  
Tidal Changes ◽  
Solar Tide

Abstract. The variabilities of the semidiurnal solar and lunar tide of the equatorial electrojet (EEJ) are investigated during the 2003, 2006, 2009 and 2013 major sudden stratospheric warming (SSW) events in this study. For this purpose, the ground-magnetometer recordings at the equatorial observatories in Huancayo and Fuquene are utilized. Results show a major enhancement in the amplitude of the EEJ semidiurnal lunar tide in each of the four warming events. The EEJ semidiurnal solar tidal amplitude shows an amplification prior to the onset of warmings, a reduction during the deceleration of the zonal mean zonal wind at 60° N and 10 hPa and a second enhancement a few days after the peak reversal of the zonal mean zonal wind during all the four SSWs. Results also reveal that the amplitude of the EEJ semidiurnal lunar tide becomes comparable or even greater than the amplitude of the EEJ semidiurnal solar tide during all these warming events. The present study also compares the EEJ semidiurnal solar and lunar tidal changes with numerical simulations of the variability of the migrating semidiurnal solar (SW2) and lunar (M2) tide in neutral temperature at ~ 120 km altitude. A better agreement between the enhancements of the EEJ semidiurnal lunar tide and the M2 tide in neutral temperature is observed in comparison with the enhancements of the EEJ semidiurnal solar tide and the SW2 tide in neutral temperature.

scholarly journals On the role of vertical electron density gradients in the generation of type II irregularities associated with blanketing ES(ESb) during counter equatorial electrojet events: A case study

Radio Science ◽  
2004 ◽  
Vol 39 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
C. V. Devasia ◽  
N. Jyoti ◽  
K. S. V. Subbarao ◽  
Diwakar Tiwari ◽  
C. Raghava Reddi ◽  
...  
Keyword(s):  
Electron Density ◽  
Equatorial Electrojet ◽  
Density Gradients ◽  
Type Ii

Lidar Measurement of Wind Velocity Profiles in the Boundary Layer

1980 ◽  
Vol 19 (5) ◽  
pp. 598-605 ◽  
Author(s):  
Jeffery T. Sroga ◽  
Edwin W. Eloranta ◽  
Ted Barber
Keyword(s):  
Boundary Layer ◽  
Wind Velocity ◽  
Velocity Profiles ◽  
Lidar Measurement
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