气候变化领域集成服务门户(CCPortal): Multiresolution decomposition and wavelet analysis of urban aerosol fluxes in Italy and Austria

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DOI	10.1016/j.atmosres.2020.105267
	Multiresolution decomposition and wavelet analysis of urban aerosol fluxes in Italy and Austria
	Conte M.; Contini D.; Held A.
发表日期	2021
ISSN	0169-8095
卷号	248
英文摘要	Observations of turbulent aerosol fluxes are fundamental to understand basic transport processes that govern changes of particle concentrations in the atmospheric boundary layer. The turbulent surface-atmosphere exchange of atmospheric particles can be quantified using several methods, including the eddy-covariance (EC) method and spectral flux estimation methods such as wavelet analysis and multiresolution decomposition. In this work, turbulent time series obtained by EC measurements in two different cities, Lecce (Italy) and Innsbruck (Austria), are spectrally analysed applying wavelet analysis and multiresolution decomposition, and the respective turbulent spectra are compared in these two European cities to quantify the contributions to turbulent fluxes in both the time and the frequency domains. As expected, particle emission is dominant in both cities following a similar diurnal cycle. Multiresolution decomposition reveals a similar cospectral peak of particle fluxes in both cities, with a median normalized frequency of n = 0.087 in Lecce and n = 0.086 in Innsbruck. Wavelet analysis shows that the 2–20 s time scales contribute very strongly to the particle flux in Lecce, while in Innsbruck the 20–200 s time scales are clearly dominant. In both cities, larger-sized eddies contribute only sporadically to turbulent aerosol fluxes. These results suggest that spectral similarity of urban particle number fluxes holds, to a large extent, even when comparing two very different urban environments and different meteorological conditions. © 2020 Elsevier B.V.
英文关键词	Cospectral peak; Spectral analysis; Spectral similarity, eddy-covariance; Urban aerosol fluxes
语种	英语
scopus关键词	Aerosols; Atmospheric boundary layer; Atmospheric thermodynamics; Atmospheric turbulence; Boundary layer flow; Wavelet analysis; Wavelet decomposition; Atmospheric particles; Meteorological condition; Multi resolution decomposition; Normalized frequencies; Particle concentrations; Spectral similarity; Turbulent spectrum; Turbulent time series; Time series analysis; aerosol; decomposition analysis; eddy covariance; spectral analysis; urban atmosphere; wavelet analysis; Austria; Innsbruck; Italy; Lecce; Puglia; Tyrol
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141675
作者单位	Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR, Str. Prv. Lecce-Monteroni km 1.2, Lecce, 73100, Italy; Environmental Chemistry and Air Quality, Department of Environmental Science and Technology, Berlin, TU, Germany
推荐引用方式 GB/T 7714	Conte M.,Contini D.,Held A.. Multiresolution decomposition and wavelet analysis of urban aerosol fluxes in Italy and Austria[J],2021,248.
APA	Conte M.,Contini D.,&Held A..(2021).Multiresolution decomposition and wavelet analysis of urban aerosol fluxes in Italy and Austria.Atmospheric Research,248.
MLA	Conte M.,et al."Multiresolution decomposition and wavelet analysis of urban aerosol fluxes in Italy and Austria".Atmospheric Research 248(2021).