One year of 222 Rn concentration in the atmospheric surface layer
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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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Surface-to-mountaintop transport characterised by radon observations at the Jungfraujoch
Alan D. Griffiths,Franz Conen,Ernest Weingartner,Lukas Zimmermann,Scott D. Chambers,Alastair G. Williams,Martin Steinbacher +6 more
TL;DR: In this article, the authors quantify the land-surface influence at Jungfraujoch hour by hour and detect the presence of anabatic winds on a daily basis during 2010-2011, but only from April to September.
Journal ArticleDOI
Atmospheric 222Rn concentration and source term at El Arenosillo 100 m meteorological tower in southwest Spain
C. Grossi,Delia Arnold,Delia Arnold,José Antonio Adame,I. Lopez-Coto,Juan Pedro Bolívar,B. A. de la Morena,Arturo Vargas +7 more
TL;DR: In this article, a seasonal analysis of atmospheric 222 Rn concentration was performed and results for each season present evidence associated with the origin of air masses reaching the El Arenosillo station.
Journal ArticleDOI
Atmospheric stability effects on potential radiological releases at a nuclear research facility in Romania: Characterising the atmospheric mixing state
Scott D. Chambers,D. Galeriu,Alastair G. Williams,A. Melintescu,Alan D. Griffiths,Jagoda Crawford,Leisa Dyer,Marin Duma,Bogdan Zorilă +8 more
TL;DR: A radon-based nocturnal stability classification scheme is developed for a flat inland site near Bucharest, Romania, characterised by significant local surface roughness heterogeneity, and compared with traditional meteorologically-based techniques.
The diurnal evolution of 222-Rn and its progeny in the atmospheric boundary layer
TL;DR: In this article, the diurnal atmospheric boundary layer evolution of the 222 Rn decaying family was studied using a state-of-the-art large-eddy simulation model, and the effect of diurnal varying turbulent characteristics on radioactive compounds initially in a secular equilibrium.
Journal ArticleDOI
Variation of atmospheric radon concentration with bimodal seasonality
Yasutaka Omori,Izumi Tohbo,Hiroyuki Nagahama,Yoichi Ishikawa,Masato Takahashi,Hiroaki Sato,Tsutomu Sekine +6 more
TL;DR: In this article, the radon concentration shows a typical diurnal cycle with a minimum in daytime and a maximum in nighttime generated by the different strength in atmospheric convection, which is well observed in the world.
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”
Journal ArticleDOI
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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