Studies on atmospheric electrical conductivity related to radon and its progeny concentrations in the lower atmosphere at Mysore

Chandrashekara, M. S.; Sannappa, J.; Paramesh, L.

doi:10.1016/j.atmosenv.2005.09.026

Cited by 28 publications

(16 citation statements)

References 15 publications

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“…Ion concentrations fluctuate depending on the amount of water flowing, which is subject to seasonal variations and oscillates with the melting of the glaciers. In contrast, the origin and structure of the ions generated at reference sites arise mostly from natural radioactivity, which is subject to diurnal changes and related to the fluctuation in concentrations of radon, thorium and their progenies (Kolarž et al, 2009;Chandrashekara, et al, 2006). Accordingly, the presented relations between alpine WFs and background air ion concentration vary diurnally and seasonally.…”

Section: Characterization Of 5 Different Alpine Waterfallsmentioning

confidence: 96%

Characterization of ions at Alpine waterfalls

et al. 2012

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Abstract. During a three-year field campaign of measuring waterfall generated ions, we monitored five different waterfalls in the Austrian Alps. Most measurements were performed at the Krimml waterfall (Salzburg, Austria), which is the biggest waterfall in Europe, and the Gartl waterfall (Mölltal, Austria). We characterized spatial, time and size distributions of waterfall-generated ions under the influence of surrounding topography. The smallest ions with boundary diameters of 0.9, 1.5 and 2 nm, were measured with a cylindrical air ion detector (CDI-06), while ion sizes from 5.5 to 350 nm were measured using a modified Grimm SMPS aerosol spectrometer. High negative ion concentration gradients are detected in the vicinity of the waterfalls, whereas the increase of positive ions was only moderate. Ions in the nano range were the most abundant at 2 nm, and at 120 nm in the sub-micrometer range.

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Section: Characterization Of 5 Different Alpine Waterfallsmentioning

confidence: 96%

Characterization of ions at Alpine waterfalls

et al. 2012

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“…6. It is well reported that, small ions generated due to ionization of atmospheric air attached themselves to neutral or charged aerosol/pollutant particles which leads to reduction in air conductivity values [21]. This may be the possible reason for small value of r = + 0.5 that exists between σ + and ionization energy.…”

Section: Resultsmentioning

confidence: 99%

“…During the study period it was observed that stability of lower atmosphere strongly influenced the conductivity of lower atmosphere and during fair weather days, a welldefined correlation exists for σ + with relative humidity and negative correlation with temperature. For example, for a typical day in January 2015, a positive Pearson's correlation coefficient (r) of +0.83 was found between σ + and relative humidity where r = -0.75 was found between σ + and temperature [21]. But the value of r is small for σ + with air pressure and gamma dose rate.…”

Section: Resultsmentioning

confidence: 99%

Influence of Meteorological Variables on Atmospheric Electric Conductivity over an Urban Location

Kumar

Nagaraja

2020

J. Sci. Res.

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The measurements of atmospheric electric conductivity along with selected meteorological parameters was carried out at Bengaluru, an urban site in southern India (12.96° N, 77.56° E) during January-December 2015 to understand the electric nature of urban air. During the study period, well defined diurnal variation of conductivity was observed with higher values before sun rise and lower values during afternoon hours. For most of the fair weather days, variations in conductivity show a strong correlation with relative humidity and anti-correlation with ambient temperature. The monthly mean values of conductivity show highest values in winter and lowest in monsoon and interestingly a positive Pearson’s correlation coefficient of +0.5 was found between measured alpha ionization energy and atmospheric conductivity during the study period.

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“…It is known that Rn emissions are affected by environmental parameters, such as temperature, relative humidity, elevation and air drafts. So one of the current problems is the assessment of the role of atmospheric parameters on radon emission, such as seasonal and daily changes in atmospheric factors (Winkler et al 2001;Singh et al 2005;Chandrashekara et al 2006;Groves-Kirkby et al 2006;Sundal et al 2008;Omori et al 2009). As a consequence, a separation of seasonal components in the radon emission is often essential in order to isolate any relationship with the seismic activity (Baykut et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Some considerations between radon and earthquakes in the crater of L’Aquila

Attanasio

Maravalle

2016

Nat Hazards

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This paper is focused on developing statistical models to analyze the connection between radon emissions and earthquakes. Owing to our personal interest and the large amount of local data available in the period before and after the main shock, we decided to run our analysis on the recent earthquake which affected the Italian city of L'Aquila. We investigated the viability of a statistical method employing radon emissions to predict earthquakes. The results show a possible connection between radon and earthquake, but it is useless, in our opinion, to use this connection to forecast the magnitude of the seismic events.

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Studies on atmospheric electrical conductivity related to radon and its progeny concentrations in the lower atmosphere at Mysore

Cited by 28 publications

References 15 publications

Characterization of ions at Alpine waterfalls

Characterization of ions at Alpine waterfalls

Influence of Meteorological Variables on Atmospheric Electric Conductivity over an Urban Location

Some considerations between radon and earthquakes in the crater of L’Aquila

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