Determination of time-varying periodicities in unequally spaced time series of OH* temperatures using a moving Lomb–Scargle periodogram and a fast calculation of the false alarm probabilities
-
Published:2020-02-05
Issue:2
Volume:13
Page:467-477
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Kalicinsky Christoph,Reisch Robert,Knieling Peter,Koppmann Ralf
Abstract
Abstract. We present an approach to analyse time series with unequal spacing. The approach enables the identification of significant periodic fluctuations and the derivation of time-resolved periods and amplitudes of these fluctuations. It is based on the classical Lomb–Scargle periodogram (LSP), a method that can handle unequally spaced time series. Here, we additionally use the idea of a moving window. The significance of the results is analysed with the typically used false alarm probability (FAP). We derived the dependencies of the FAP levels on different parameters that either can be changed manually (length of the analysed time interval, frequency range) or that change naturally (number of data gaps). By means of these dependencies, we found a fast and easy way to calculate FAP levels for different configurations of these parameters without the need for a large number of simulations. The general performance of the approach is tested with different artificially generated time series and the results are very promising. Finally, we present results for nightly mean OH* temperatures that have been observed from Wuppertal (51∘ N, 7∘ E; Germany).
Funder
Bundesministerium für Bildung und Forschung
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference25 articles.
1. Baker, D. J. and Stair Jr., A. T.: Rocket measurements of the altitude distributions of the hydroxyl airglow, Phys. Scripta, 37, 611, https://doi.org/10.1088/0031-8949/37/4/021, 1998. a 2. Bittner, M., Offermann, D., and Graef, H. H.: Mesopause temperature variability above a midlatitude station in Europe, J. Geophys. Res., 105, 2045–2058, https://doi.org/10.1029/1999JD900307, 2000. a, b, c, d, e, f, g, h, i, j 3. Bittner, M., Offermann, D., Graef, H. H., Donner, M., and Hamilton, K.: An 18-year time series of OH* rotational temperatures and middle atmosphere decadal variations, J. Atmos. Sol.-Terr. Phy., 64, 1147–1166, https://doi.org/10.1016/S1364-6826(02)00065-2, 2002. a, b 4. Cumming, A., Marcy, G. W., and Butler, R. P.: The lick planet search: detectability and mass thresholds, Astrophys. J., 526, 890–915, https://doi.org/10.1086/308020, 1999. a, b, c, d, e, f, g, h 5. Das, U. and Sinha, H. S. S.: Long‐term variations in oxygen green line emission over Kiso, Japan, from ground photometric observations using continuous wavelet transform, J. Geophys. Res., 113, D19115, https://doi.org/10.1029/2007JD009516, 2008. a, b, c
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|