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Inertia gravity wave in the stratosphere and mesosphere observed by Doppler wind and temperature lidar
Author(s) -
Baumgarten G.,
Fiedler J.,
Hildebrand J.,
Lübken F.J.
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2015gl066991
Subject(s) - gravity wave , stratosphere , lidar , atmospheric sciences , mesosphere , altitude (triangle) , doppler effect , stratopause , gravitational wave , atmosphere (unit) , wind speed , atmospheric wave , daytime , amplitude , physics , geology , meteorology , astrophysics , remote sensing , astronomy , geometry , mathematics , quantum mechanics
We report on the first observation of persistent inertia gravity wave signatures in the horizontal wind and temperature by Doppler Rayleigh lidar in the middle atmosphere. The observations were performed at the Arctic Lidar Observatory for Middle Atmosphere Research station in northern Norway (69°N,16°E) between 21 and 23 January 2012. The measurements cover the altitude range from 20 km to about 80 km during nighttime and to about 70 km during daytime. We observe amplitudes of 5 to 25 m/s and 1 to 8 K in wind and temperature, respectively. The measured kinetic to potential energy density ratio is about 10, indicating that the majority of variability is due to waves with intrinsic frequencies close to the inertial frequency. The entire wavefield is mainly characterized by the presence of multiple waves; however, quasi‐monochromatic waves could be identified at limited times around 60 km altitude with a mean momentum flux in direction of propagation of 3.8 m 2 /s 2 .