Diurnal and seasonal variations of radioactivity and electrical conductivity near the surface for a continental location Mysore, India

Prasad, B. S. N.; Nagaraja, K.K.; Chandrashekara, M. S.; Paramesh, L.; Madhava, M. S.

doi:10.1016/j.atmosres.2004.11.011

Cited by 46 publications

(20 citation statements)

References 25 publications

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“…Also the influence of air temperature seems to be important. Similar conclusions on the seasonal variations in the environmental gamma-radiation were reported in literature (Baciu, 2006;Lebedyte et al, 2003;Prasad et al, 2005;Yamazaki et al, 2002). Hereafter only the results for 40 K activity and soil water content are reported.…”

Section: Resultssupporting

confidence: 77%

Modelling seasonal variations of natural radionuclides in agricultural soils

Guagliardi

Buttafuoco

Ricca

et al. 2013

E3S Web of Conferences

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Abstract. Estimating activity of natural radionuclides in agricultural soil is very important for the protection of public health because the released radioactivity can enter the food chain. Radioactivity measurements were carried out in two different dates (winter and summer) in agricultural soil using a GRM-260 gamma-ray spectrometer. The study area (100 m x 100 m) was an olive orchard in southern Italy. Measurements were carried out at 361 locations in January and July 2011. At the same locations, soil water content was measured to take into account the effect of soil moisture on radioactivity. A multi-Gaussian approach was used to explore and map the activity of naturally occurring radionuclides and soil water content for both seasons of measurements. The minimum radioactivity values were recorded in winter and the maximum values in summer, probably as a consequence of changes in weather and soil conditions (rainfall, soil moisture, temperature).

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Section: Resultssupporting

confidence: 77%

Modelling seasonal variations of natural radionuclides in agricultural soils

Guagliardi

Buttafuoco

Ricca

et al. 2013

E3S Web of Conferences

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“…Each January, radon concentrations peak (Debaje et al, 1996) in which large cluster-ion pairs are produced. This may be due to intense temperature inversions during the colder period (January), leading to the accumulation of more radon near the Earth's surface and increasing the ionization rate (Parsad et al, 2005). Therefore, as compared to all other months we observed a greater number of positive and negative cluster ions in January 2008.…”

Section: Resultsmentioning

confidence: 66%

“…5 and 6, the average ion concentrations are decreasing from January 2008 to May 2008. Due to high temperatures, radon escapes to higher altitudes (Debaje et al, 1996, Parsad et al, 2005, therefore in May 2008 the minimum average for air ions was observed for all time periods.…”

Section: Resultsmentioning

confidence: 99%

“…As crop cultivation decreases from February to April 2008, plant transpiration of radon and thoron (Martell and Poet, 1982), so does ion pair production decrease. During summer, the gases move upward carrying radon with it, thereby reducing ionization (Parsad et al, 2005) (Bondietti et al, 1984) of radon and thoron is lowest. Therefore, both average (Figs.…”

Section: Resultsmentioning

confidence: 99%

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Diurnal and Seasonal Air Ion Variability at Rural Station Ramanandnagar (17°2'N, 74°E), India

Pawar¹,

Meena

Jadhav

2010

Aerosol Air Qual. Res.

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“…The observatory is located on the outskirts of the city and relatively free from air pollution produced by vehicular traffic and human activities. The details of experimental setup for the measurement of radon and its progeny to obtain ion production rate are given in Prasad et al (2005) and Nagaraja et al (2009) and here it is briefly discussed for the continuity of presentation. Simultaneous measurements of temperature, relative humidity, pressure and wind speed have been made.…”

Section: Experiments and Methodologymentioning

confidence: 99%

Estimation of small ion concentration near the Earth's surface

Nagaraja¹,

Pawar²,

Murugavel³

et al. 2011

Journal of Atmospheric and Solar-Terrestrial Physics

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a b s t r a c tAtmospheric ions produced by radon gas exhalation from the Earth's surface can play a vital role in the electrification of atmosphere, especially during nights when the gases are trapped in a stable layer close to the surface. The measurements of concentration of radon and its progeny, air conductivity and aerosol size distribution made at Pune, India, have been analyzed. The concentrations of radon and its progeny show maxima during night and early morning hours, between 0500 and 0700 IST when atmosphere is more stable and mixing is low and start decreasing after sunrise and attain minima during 1000-1800 h when air is unstable. The diurnal variation of the ionization rate, calculated using the concentrations of radon and its progeny, follows the variations of concentrations of radon and its progeny. The ion-aerosol balance equations are solved to study the effect of aerosols on small ion concentration in the lower atmosphere. It has been found that during daytime when aerosol concentration is high, 20-30% reduction in small ion concentration can occur due to aerosols. The small ion concentration estimated using measured air conductivity is compared with small ion concentration estimated by solving ion-aerosol balance equations and both are found to be in good agreement with each other.

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Diurnal and seasonal variations of radioactivity and electrical conductivity near the surface for a continental location Mysore, India

Cited by 46 publications

References 25 publications

Modelling seasonal variations of natural radionuclides in agricultural soils

Modelling seasonal variations of natural radionuclides in agricultural soils

Diurnal and Seasonal Air Ion Variability at Rural Station Ramanandnagar (17°2'N, 74°E), India

Estimation of small ion concentration near the Earth's surface

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