Analysis of temperature influences on the amplitude–frequency characteristics of Rn gas concentration

Finkelstein, Michael; Eppelbaum, Lev; Price, Colin

doi:10.1016/j.jenvrad.2005.09.004

Cited by 40 publications

(21 citation statements)

References 49 publications

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“…It is assumed that the temporal patterns of Rn in the geogas phase are owing to processes affecting its exhalation from the country rock and/or gas transfer processes in the complex consisting of rock porosity and subsurface air space. Environmental influences, particularly atmospheric pressure and temperature, have been proposed for the origin of the periodic signals observed in Rn time series [1][2][3][4]. However, other studies indicate that a consistent meteorological influence cannot be identified as giving rise to variability in Rn time series and suggest gravitational tides as an influencing factor on Rn variability [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of a component of solar irradiance on radon signals at 1 km depth, Gran Sasso, Italy

2013

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Exploratory monitoring of radon is conducted at one location in the deep underground Gran Sasso National Laboratory (LNGS). Measurements (15-min resolution) are performed over a time span of ca 600 days in the air of the surrounding calcareous country rock. Using both α - and γ -ray detectors, systematic and recurring radon signals are recorded. Two primary signal types are determined: (i) non-periodic multi-day (MD) signals lasting 2–10 days and (ii) daily radon (DR) signals—which are of a periodic nature exhibiting a primary 24-h cycle ( θ =0.48). The local ancillary environmental conditions (pressure, temperature) seem not to affect radon in air monitored at the site. Long-term patterns of daytime measurements are different from the pattern of night-time measurements indicating a day–night modulation of γ -radiation from radon in air. The phenomenology of the MD and DR signals is similar to situations encountered at other locations where radon is monitored with a high time resolution in geogas at upper crustal levels. In accordance with recent field and experimental results, it is suggested that a component of solar irradiance is affecting the radiation from radon in air, and this influence is further modulated by the diurnal rotation of the Earth. The occurrence of these radon signals in the 1 km deep low-radiation underground geological environment of LNGS provides new information on the time variation of the local radiation environment. The observations and results place the LNGS facility as a high-priority location for performing advanced investigations of these geophysical phenomena.

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Section: Introductionmentioning

confidence: 99%

Influence of a component of solar irradiance on radon signals at 1 km depth, Gran Sasso, Italy

2013

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“…It is assumed that the temporal patterns of 222 Rn in the geogas phase are due to processes affecting its exhalation from the country rock and/ or gas transfer processes in the complex consisting of rock porosity and subsurface air space. Environmental influences, particularly atmospheric pressure and temperature, have been proposed for the origin of the periodic signals observed in 222 Rn time series (Shapiro et al, 1985;Ball et al, 1991;Pinault and Baubron, 1997;Finkelstein et al, 2006). However, other studies (Aumento, 2002;GrovesKirby et al, 2006;Crockett et al, 2006;Weinlich et al, 2006) indicate that a consistent meteorological influence cannot be identified as giving rise to variability in 222 Rn time series, and suggest gravitational tides as an influencing factor on 222 Rn variability, since both earth tides and ocean tidal loading may drive periodic 222 Rn exhalation via crustal expansion/compression and geophysically-driven groundwater level variations.…”

Section: Introductionmentioning

confidence: 99%

Possible effect of solar tides on radon signals

Steinitz¹,

Piatibratova²,

Kotlarsky³

2011

Journal of Environmental Radioactivity

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“…Environmental influences, particularly atmospheric pressure and temperature, have been proposed for the origin of the periodic signals observed in radon time series (Shapiro et al, 1985;Ball et al, 1991;Pinault and Baubron, 1997;Finkelstein et al, 2006). However, other studies (Aumento, 2002;Groves-Kirby et al, 2006;Crocket et al, 2006;Weinlich et al, 2006) indicate that a consistent meteorological influence cannot be identified as giving rise to variability in radon time series, and suggest gravitational tides as an influencing factor on radon variability, since both earth tides and ocean tidal loading may drive periodic radon exhalation via crustal expansion/compression and geophysically driven groundwater level variations.…”

Section: Introductionmentioning

confidence: 99%

Radon signals at the Roded site, Southern Israel

Steinitz

Piatibratova

2010

Solid Earth

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Abstract. Temporal variations of radon in the geological environment (upper crust) are frequent and recognized as unique in terms of the signals encountered and for the lack of substantial and generally applicable explanations. The phenomena observed at the Roded site, located in arid southern Israel, illustrate this situation. The monitoring of radon in the last 10 years or more has been carried out in massive meta-diorite of the Precambrian basement block of Roded. The measurement is conducted using an alpha detector at a resolution of 15-min, placed in a borehole at a depth of 9 m, within a PVC casing to that depth. Systematic temporal variation patterns, manifested as large relative signals are composed of sub-diurnal (SDR) radon, multi-day (MD) and annual (AR) signals. The overall variation is dominated by the intense SDR signals which occur in some days, and may vary from background levels (5 counts or less) to peak values (attaining > 1000 counts) and back to background at an interval of 6 to 12 h. Intervals of up to several tens of days without significant SDR signals interchange with times of intense daily occurrences of such signals. Their occurrence indicates very fast variations of radiation from radon at the point of measurement. The peak times, within the diurnal 24-h cycle of SDR signals occur preferentially at an interval of 14-16 h (UT+2). Spectral analysis indicates: (a) A diurnal periodicity composed of a primary 24-h and a secondary 12-h periodicity, which are attributed to the solar tide constituents S1 and S2. Tidal constituents indicative for gravity tide (O1, M2) are lacking; (b) An annual periodicity. A compound relation among the diurnal and annual periodicity is indicated by: (a) Continuous Wavelet Transform (CWT) analysis shows an overall annual structure with a modulation of the S1 and S2 periodicities; (b) Moving-time-window Fourier spectral analysis showing that the amplitudes of S1Correspondence to: G. Steinitz (steinitz@gsi.gov.il) and S2 vary in an annual pattern, with relatively high values in summer. The phase of S1, S2 and S3 shows a systematic multi-year variation. It is suggested that the significant signatures of the periodic phenomena and their modulations reflect a direct link with the solar radiation tide.

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Analysis of temperature influences on the amplitude–frequency characteristics of Rn gas concentration

Cited by 40 publications

References 49 publications

Influence of a component of solar irradiance on radon signals at 1 km depth, Gran Sasso, Italy

Influence of a component of solar irradiance on radon signals at 1 km depth, Gran Sasso, Italy

Possible effect of solar tides on radon signals

Radon signals at the Roded site, Southern Israel

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