One year of 222 Rn concentration in the atmospheric surface layer
TLDR
In this article, a one-year time series of radon measured in a rural area in the North of Italy in 1997 has been analyzed, where wavelet analysis is used as one of the investigation tools of the time series.Abstract:
A one-year time series of 222 Rn measured in a rural area in the North of Italy in 1997 is analyzed. The scope of the investigation is to better understand the behavior of this common atmospheric tracer in relation to the meteorological conditions at the release site. Wavelet analysis is used as one of the investigation tools of the time series. The measurements and scalograms of 222 Rn are compared to those of wind-speed, pressure, relative humidity, temperature and NO x . The use of wavelet analysis allows the identification of the various scales controlling the influence of the meteorological variables on 222 Rn dispersion in the surface layer that are not visible through classical Fourier analysis or direct time series inspection. The analysis of the time series has identified specific periods during which the usual diurnal variation of radon is superimposed to a linear growth thus indicating the build up of concentration at the measurement level. From these specific cases an estimate of the surface flux of 222 Rn is made. By means of a simple model these special cases are reproduced.read more
Citations
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Review on airflow in unsaturated zones induced by natural forcings
TL;DR: In this paper, the authors synthesize the published literature on subsurface airflow driven by natural forcings such as atmospheric pressure fluctuations, topographic effect, water table fluctuations, and water infiltration.
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On the use of radon for quantifying the effects of atmospheric stability on urban emissions
TL;DR: In this article, the authors argue that single-height radon observations should not be used quantitatively as an indicator of atmospheric stability without prior conditioning of the time series to remove contributions from larger-scale "non-local" processes.
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Investigations on indoor radon in Austria, Part 1: Seasonality of indoor radon concentration.
Peter Bossew,Herbert Lettner +1 more
TL;DR: The seasonality of indoor Rn concentration measured in Austria is investigated as a function of other factors that influence indoors Rn, with higher Rn levels in winter.
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Quantifying the influences of atmospheric stability on air pollution in Lanzhou, China, using a radon-based stability monitor
Scott D. Chambers,Fenjuan Wang,Fenjuan Wang,Alastair G. Williams,Deng Xiaodong,Hua Zhang,Giovanni Lonati,Jagoda Crawford,Alan D. Griffiths,A. Ianniello,Ivo Allegrini +10 more
TL;DR: In this paper, a technique recently developed for stability classification using a research-quality dual-flow-loop two-filter radon detector is adapted for use with a commercially available radon-based stability monitor.
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Radon as a tracer of atmospheric influences on traffic-related air pollution in a small inland city
Alastair G. Williams,Scott D. Chambers,Franz Conen,Stefan Reimann,Matthias Hill,Alan D. Griffiths,Jagoda Crawford +6 more
TL;DR: One year of radon, benzene and carbon monoxide (CO) concentrations were analyzed to characterise the combined influences of variations in traffic density and meteorological conditions on urban air quality in Bern, Switzerland as mentioned in this paper.
References
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Journal ArticleDOI
A Practical Guide to Wavelet Analysis.
TL;DR: In this article, a step-by-step guide to wavelet analysis is given, with examples taken from time series of the El Nino-Southern Oscillation (ENSO).
Journal ArticleDOI
Wavelet Transforms and their Applications to Turbulence
TL;DR: Wavelet transforms are recent mathematical techniques, based on group theory and square integrable representations, which allows one to unfold a signal, or a field, into both space and scale, and possibly directions.
Journal ArticleDOI
On the Power Spectrum of “Red Noise”
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Evaluation and intercomparison of global atmospheric transport models using 222Rn and other short-lived tracers
Daniel J. Jacob,Michael J. Prather,Philip J. Rasch,Run-Lie Shia,Yves Balkanski,S. R. Beagley,Daniel Bergmann,W. T. Blackshear,Margaret Brown,Masaru Chiba,Martyn P. Chipperfield,J. de Grandpré,Jane Dignon,Johann Feichter,Christophe Genthon,William L. Grose,Prasad S. Kasibhatla,I. Köhler,Mark A. Kritz,K. S. Law,Joyce E. Penner,Michel Ramonet,Claire E. Reeves,D. A. Rotman,Deianeira Z. Stockwell,Peter van Velthoven,Gé Verver,Oliver Wild,Hu Yang,Peter H. Zimmermann +29 more
TL;DR: In this article, simulations of 222Rn and other short-lived tracers are used to evaluate and intercompare the representations of convective and synoptic processes in 20 global atmospheric transport models.
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Atmospheric pressure effects on 222Rn transport across the Earth-air interface
TL;DR: The effect of large-scale atmospheric pressure changes on the 222Rn flux across the soil-air interface is investigated in this paper, where a simple model of molecular diffusion combined with pressure-induced transport in the soil has been confirmed by laboratory experiments using a vertical column of 226Ra-bearing sand.
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