Evaluation of methods for gravity wave extraction from middle-atmospheric lidar temperature measurements

Autor: B. Ehard, B. Kaifler, N. Kaifler, M. Rapp
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Atmospheric Measurement Techniques, Vol 8, Iss 11, Pp 4645-4655 (2015)
Druh dokumentu: article
ISSN: 1867-1381
1867-8548
DOI: 10.5194/amt-8-4645-2015
Popis: This study evaluates commonly used methods of extracting gravity-wave-induced temperature perturbations from lidar measurements. The spectral response of these methods is characterized with the help of a synthetic data set with known temperature perturbations added to a realistic background temperature profile. The simulations are carried out with the background temperature being either constant or varying in time to evaluate the sensitivity to temperature perturbations not caused by gravity waves. The different methods are applied to lidar measurements over New Zealand, and the performance of the algorithms is evaluated. We find that the Butterworth filter performs best if gravity waves over a wide range of periods are to be extracted from lidar temperature measurements. The running mean method gives good results if only gravity waves with short periods are to be analyzed.
Databáze: Directory of Open Access Journals
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