Estimation of Seasonal Variations of Hard Cosmic Ray Flux and Atmospheric Pressure in 2004–2005

Styro, D. B.; Damauskaitė, Jovita; Kleiza, Jonas

doi:10.3846/jeelm.2010.26

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…The absence of any increase in the higher energy band indicates that the enhancement in our observations is solely due to the rainfall. Styro et al (2010) showed that the variation of hard cosmic ray flux and atmospheric pressure has a strong inverse correlation. They observed that atmospheric pressure decreases when a cyclone is in motion over the observation site, resulting in the reduced air density and hence more cosmic particles can reach the ground surface (Styro et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Nishina et al (1940a) noted that the observed decrease in cosmic ray intensities is expected because of the temperature effect of the cosmic rays, for the northwest passage of a typhoon. Recently, Styro et al (2010) attempted to study the influence of cyclonic events on hard cosmic ray flux (HCRF) using NaI (Tl) scintillation detector for γ -ray spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

“…Nishina et al (1940b) explained the variations in the cosmic ray intensity based on the passage of the cold front and warm front, which intuitively seems justifiable because in the subtropical area, like Japan, weather fronts are the principal drivers of meteorological phenomena. Also, Styro et al (2010) have studied HCRF in Vilnius, Lithuania, again in the subtropic zone. However, the effects of cyclones are not studied in detail in the tropical/equatorial region.…”

Section: Introductionmentioning

confidence: 99%

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Response of Gamma-Ray Spectrum During Ockhi Cyclone

et al. 2020

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Cyclone Ockhi hit Sri Lanka and southern parts of India in Nov-Dec 2017 with a devastating social impact. The present paper reports that the cyclone had a significant effect on the γ-ray flux measured by NaI (Tl) detector. An overall decrease is observed in the γ-ray flux during the passage of cyclone; however, a detailed investigation revealed that different energies show varying results. In the energy range between 250-450 keV, a decrease up to ∼14% is observed, whereas an increase up to ∼45% is observed in the energy range between 600 keV-2.7 MeV. The energies above 2.7 MeV do not show any change. This is the first-ever observation of the varying effects of the cyclone with the energy bands of the γ-ray spectrum. We found that the increase observed in the energy range of 600 keV-2.7 MeV is primarily due to the increase in the terrestrial radioactivity (peaks of 222 Rn daughters), which is brought over by the rainfall accompanied with the cyclone. The study indicates that the decrease in the lower energy range of the γ-ray flux could be due to the attenuation caused by the increased tropospheric air-mass associated with the cyclone over the observation site. The high energy γ-rays are not affected due to the cyclone.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of Gamma-Ray Spectrum During Ockhi Cyclone

et al. 2020

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“…The monitoring of hard cosmic rays flux (HCRF) was carried out by a gama -spectrometer with scintillation detector [17]- [21]. The detector of device made of crystal NaI(Tl) (6,3×6,3 cm) was covered with a lead protection of 12 cm thick to absorb the mild component of cosmic radiation (Styra et al2005).…”

Section: Methodsmentioning

confidence: 99%

About relationship between hard cosmic rays flux and trauma leaps in assessing the human factor in 2007–2012 in Vilnius city

Styro

Usovaitė

2014

The 9th International Conference "Environmental Engineering 2014"

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The stable short-term prognostic relationship between a decrease of hard cosmic ray flux (HCRF) near the ground surface and subsequent leaps in traumatism occurrence within 1-3 days is known. A gamma spectrometer with a scintillation detector was used to register the HCRF near the ground surface. To achieve effective results from analysis, the criterion of a continuous decrease of HCRF was chosen 200 impulses or more within 4 hours. The present study was restricted to time periods when the cosmophysical and medical data could be compared. A correlation between HCRF decrease and increase of trauma number after 1-3 days was determined. For the shortterm prognosis of trauma leaps in 2007-2012 exceeding average monthly value by 10% and more in 1-3 days after HCRF decrease the high efficiency of the results 50-80% was obtained. The human factor has an additional influence in trauma leaps, which was considered in these studies. However, this impact is problematic to define from the whole external influences on human health. As far as number of leaps in trauma depends on the day of week with a minimum values on Tuesday and Wednesday and maximum value on Friday and Saturday. Based on an assessment the human factor has improved trauma leaps prediction results.

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“…However, because of their short lifetime (26 ns), π-mesons cover a short distance (about 125 m) and turn into muons with a lifetime of 2 μs (14). During this time, muons cannot reach the ground surface from the altitude of 15 km; therefore, their flux to the ground surface is registered from lower heights (15)(16)(17). So, near the ground surface, only the secondary cosmic flux takes place.…”

Section: Introductionmentioning

confidence: 99%

On prognostic connection between hard cosmic ray flux decrease and leaps of cardiovascular diseases in 2008–2009 in Vilnius

Styra¹,

Juozulynas²,

Usovaitė³

et al. 2011

AML

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Data on a prognostic relationship between the hard cosmic ray flux (HCRF) and the leaps of cardiovascular diseases (CVD) in Vilnius in 2008-2009 are presented. A gamma spectrometer with a scintillation detector were used to register the HCRF near the ground surface. Data on CVD over a period of 24 months (2008-2009) were obtained from the Vilnius Ambulance Service. Information on CVD was selected for all age groups in accordance with the international codes for identification of diseases (ICD). The present study was restricted to time periods when the cosmophysical and medical data could be compared. For the processing of experimental results, empirical criteria in the analysis of HCRF and CVD were used. The criterion in HCRF change is a decrease of HCRF values by 200 impulses and more during a period of 4 hours. The CVD number exceeding the monthly average value by 10, 15, 20% was analysed. A correlation between the above parameters was studied in the range of 1-3-day period. The efficiency of the prognosis of CVD leaps by HCRF decrease in 1-2 days in 2008 was 74-82% and in 2009 65-70%, and for 2-3 days in 2008 54-60% and in 2009 63-65%. The human factor was analysed, too.

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Estimation of Seasonal Variations of Hard Cosmic Ray Flux and Atmospheric Pressure in 2004–2005

Cited by 3 publications

References 8 publications

Response of Gamma-Ray Spectrum During Ockhi Cyclone

Response of Gamma-Ray Spectrum During Ockhi Cyclone

About relationship between hard cosmic rays flux and trauma leaps in assessing the human factor in 2007–2012 in Vilnius city

On prognostic connection between hard cosmic ray flux decrease and leaps of cardiovascular diseases in 2008–2009 in Vilnius

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