Lidar observations of atmospheric internal waves in the boundary layer of the atmosphere on the coast of Lake Baikal
Atmospheric internal waves (AIWs) in the boundary layer of atmosphere have been studied experimentally with the use of Halo Photonics pulsed coherent Doppler wind lidar Stream Line. The measurements were carried out over 14–28 August 2015 on the western coast of Lake Baikal (51°50′47.17′′ N, 104°53′...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-10-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/9/5239/2016/amt-9-5239-2016.pdf |
| Summary: | Atmospheric internal waves (AIWs) in the boundary layer
of atmosphere have been studied experimentally with the use of Halo
Photonics pulsed coherent Doppler wind lidar Stream Line. The measurements
were carried out over 14–28 August 2015 on the western coast of Lake Baikal
(51°50′47.17′′ N, 104°53′31.21′′ E), Russia. The lidar
was placed at a distance of 340 m from Lake Baikal at a height of 180 m above
the lake level.</p><p class="p">A total of six AIW occurrences have been revealed. This always happened in
the presence of one or two (in five out of six cases) narrow jet streams at heights
of approximately 200 and 700 m above ground level at the lidar location. The
period of oscillations of the wave addend of the wind velocity components in
four AIW events was 9 min, and in the other two it was approximately 18 and
6.5 min. The amplitude of oscillations of the horizontal wind velocity
component was about 1 m s<sup>−1</sup>, while the amplitude of oscillations of the
vertical velocity was 3 times smaller. In most cases, internal waves
were observed for 45 min (5 wave oscillations with a period of 9 min). Only
once the AIW lifetime was about 4 h. |
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| ISSN: | 1867-1381 1867-8548 |