vertical wind retrieved by airborne lidar and analysis of island induced gravity waves in combination with numerical models and in situ particle measurements
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2016
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Abstract
This study presents the analysis of island induced gravity waves observed by
an airborne Doppler wind lidar (DWL) during SALTRACE. First, the
instrumental corrections required for the retrieval of high spatial
resolution vertical wind measurements from an airborne DWL are presented and
the measurement accuracy estimated by means of two different methods. The
estimated systematic error is below −0.05 m s−1 for the selected case
of study, while the random error lies between 0.1 and 0.16 m s−1 depending on the estimation method.
Then, the presented method is applied to two measurement flights during which the presence of island induced gravity waves was detected. The first case corresponds to a research flight conducted on 17 June 2013 in the Cabo Verde islands region, while the second case corresponds to a measurement flight on 26 June 2013 in the Barbados region. The presence of trapped lee waves predicted by the calculated Scorer parameter profiles was confirmed by the lidar and in situ observations. The DWL measurements are used in combination with in situ wind and particle number density measurements, large-eddy simulations (LES), and wavelet analysis to determine the main characteristics of the observed island induced trapped waves.
Then, the presented method is applied to two measurement flights during which the presence of island induced gravity waves was detected. The first case corresponds to a research flight conducted on 17 June 2013 in the Cabo Verde islands region, while the second case corresponds to a measurement flight on 26 June 2013 in the Barbados region. The presence of trapped lee waves predicted by the calculated Scorer parameter profiles was confirmed by the lidar and in situ observations. The DWL measurements are used in combination with in situ wind and particle number density measurements, large-eddy simulations (LES), and wavelet analysis to determine the main characteristics of the observed island induced trapped waves.
| Reference Key |
chouza2016atmosphericvertical
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|---|---|
| Authors | ;F. Chouza;O. Reitebuch;M. Jähn;S. Rahm;B. Weinzierl;B. Weinzierl |
| Journal | Journal of agricultural and food chemistry |
| Year | 2016 |
| DOI |
10.5194/acp-16-4675-2016
|
| URL | |
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