scholarly journals Seasonal variation of gravity wave activity at midlatitudes from 7 years of COSMIC GPS and Rayleigh lidar temperature observations

2015 ◽  
Vol 42 (4) ◽  
pp. 1251-1258 ◽  
Author(s):  
S. M. Khaykin ◽  
A. Hauchecorne ◽  
N. Mzé ◽  
P. Keckhut
Keyword(s):  
Seasonal Variation ◽  
Gravity Wave ◽  
Wave Activity ◽  
Temperature Observations ◽  
Rayleigh Lidar

scholarly journals 11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America

2019 ◽  
Vol 124 (2) ◽  
pp. 451-467 ◽  
Author(s):  
P. Llamedo ◽  
J. Salvador ◽  
A. Torre ◽  
J. Quiroga ◽  
P. Alexander ◽  
...  
Keyword(s):  
South America ◽  
Gravity Wave ◽  
Wave Activity ◽  
Rayleigh Lidar ◽  
Lidar Observations

Gravity wave activity in the upper stratosphere and lower mesosphere observed with the Rayleigh lidar at Tsukuba, Japan

1994 ◽  
Vol 21 (14) ◽  
pp. 1539-1542 ◽  
Author(s):  
Y. Murayama ◽  
T. Tsuda ◽  
R. Wilson ◽  
H. Nakane ◽  
S. A. Hayashida ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Wave Activity ◽  
Rayleigh Lidar

scholarly journals Turbulence characteristics in the tropical mesosphere as obtained by MST radar at Gadanki (13.5° N, 79.2° E)

2001 ◽  
Vol 19 (8) ◽  
pp. 1019-1025 ◽  
Author(s):  
M. N. Sasi ◽  
L. Vijayan
Keyword(s):  
Seasonal Variation ◽  
Gravity Wave ◽  
Middle Atmosphere ◽  
Indian Subcontinent ◽  
Southwest Monsoon ◽  
Wave Activity ◽  
Tropical Meteorology ◽  
Monsoon Period ◽  
Mst Radar ◽  
Summer Maximum

Abstract. Turbulent kinetic energy dissipation rates (ε) and eddy diffusion coefficients (Kz) in the tropical mesosphere over Gadanki (13.5° N, 79.2° E), estimated from Doppler widths of MST radar echoes (vertical beam), observed over a 3-year period, show a seasonal variation with a dominant summer maximum. The observed seasonal variation of ε and Kz in the mesosphere is only partially consistent with that of gravity wave activity inferred from mesospheric winds and temperatures measured by rockets for a period of 9 years at Trivandrum (8.5° N, 77° E) (which shows two equinox and one summer maxima) lying close to Gadanki. The summer maximum of mesospheric ε and Kz values appears to be related to the enhanced gravity wave activity over the low-latitude Indian subcontinent during the southwest monsoon period (June – September). Both ε and Kz in the mesosphere over Gadanki show an increase with an increase in height during all seasons. The absolute values of observed ε and Kz in the mesosphere (above ~80 km) does not show significant differences from those reported for high latitudes. Comparison of observed Kz values during the winter above Gadanki with those over Arecibo (18.5° N, 66° W) shows that they are not significantly different from each other above the ~80 km altitude.Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; tropical meteorology; wave and tides)

scholarly journals Seasonal variation of short-period (<2 h) gravity wave activity over Gadanki, India (13.5°N, 79.2°E)

2008 ◽  
Vol 113 (D14) ◽  
Author(s):  
Gopa Dutta ◽  
Toshitaka Tsuda ◽  
P. Vinay Kumar ◽  
M. C. Ajay Kumar ◽  
Simon P. Alexander ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Gravity Wave ◽  
Wave Activity ◽  
Period 2 ◽  
Short Period
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