Atmospheric- Weighted Temperature and its influence on Cosmic Ray muons

Maghrabi, Abdullrahman; Almutayri, M. M.; Alharbi, H. H.; Baig, Muneer

doi:10.22323/1.236.0040

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…[19] and [20] have shown there is a direct link between SSW and cosmic-ray Muon flux (CMF) via the atmospheric effective temperature. The effective temperature is the weighted-atmospheric temperature that acts as a proxy for the temperature of the real atmosphere when the various conditions from the point of observa- [21] and [22]. [23] strengthens our argument of the link between cosmic-ray Muon flux (CMF)-Sudden Stratospheric Warming (SSW) and the primary dry season (PDS) by pointing to a strong statistical correlation between cosmic-ray flux, large-scale precipitation and precipitation efficiency.…”

Section: Introductionsupporting

confidence: 55%

Investigating the Apparent Link between Cosmic Ray Muon Flux, Sudden Stratospheric Warming and Dry Season Rainfall over Jamaica

Brown¹,

Charlery²,

Voutchkov³

2019

ACS

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The Jamaican primary dry season extends from November-April with the driest period being January-March each year. Examination of the rainfall records over several decades reveal months that experienced a sharp increase in rainfall while sometimes they are drier than normal. During this dry season, some of the weather systems that impact the island significantly are cold fronts, highs pressure systems and troughs that migrate from the mainland USA. Major Sudden Stratospheric Warmings (SSW) occur routinely north of 60˚N and severely impact weather over the North American continent. The islands of the Greater Antilles also experience inclement weather during this period as weather systems migrate southwards and impact the Caribbean. Severe winter weather due to the increase frequency and intensity of storms related to SSW events over North America is important to the Jamaican economy as tourists escape harsh winters by travelling to the island. Predicting the variability of rainfall during the primary dry season is therefore important as it has significant implications for event planning, tourism and agriculture. Cosmic-ray Muon flux has been found to be positively correlated with the atmospheric effective temperature used to indicate the occurrence of SSW events. Current research investigates the relationship between cosmic-ray Muon flux, SSW events and primary dry season rainfall. Our findings suggest that a significant change in rainfall occur over Jamaica during the primary dry season on average 29 days after the central date or on average 15 days after the SSW events end. Our study also suggests apparent similarities in the behaviour of cosmic-ray Muon flux over Jamaica to those when major SSW How to cite this paper: Brown, L.P., Charlery, J. and Voutchkov, M. (2019) Investigating the Apparent Link between Cosmic Ray Muon Flux, Sudden Stratospheric Warming and Dry Season Rainfall over Jamaica. Atmospheric and Climate Sciences,9,

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Section: Introductionsupporting

confidence: 55%

Investigating the Apparent Link between Cosmic Ray Muon Flux, Sudden Stratospheric Warming and Dry Season Rainfall over Jamaica

Brown¹,

Charlery²,

Voutchkov³

2019

ACS

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“…The calculation procedures were conducted on the basis of (1). Multiple regression analyses were conducted between (i) raw muon rate and both pressure and temperature at the production level; (ii) raw muon rate and both pressure and level of pion production; (iii) raw muon rate and the three parameters; and (iv) pressure-corrected muon rate, using the method discussed in Maghrabi et al [23] and Maghrabi et al [12,13], which was correlated with both height and the temperature at the production level. 12 h data for each Advances in Astronomy 3 day during the specific month were used in the calculations.…”

Section: Resultsmentioning

confidence: 99%

“…According to theoretical and experimental investigations, atmospheric pressure is the most important factor affecting both cosmic ray muons and neutrons. It is a measure of the total atmospheric absorption above the detector (e.g., [8,[11][12][13]).…”

Section: Introductionmentioning

confidence: 99%

“…Some workers have used the temperature at screen levels [14][15][16][17][18]; others used the weighted temperature, which is a measure of temperature over the whole atmospheric profile [12,13,19], while still others used the temperature at the pion production level [20]. It has been found (e.g., [12,13,15]) that the method of weighted temperature (i.e., the integration method) is the most reasonable procedure to correct for the temperature effect on cosmic ray muons. However, due to the scarcity of the atmospheric temperature measurements at certain atmospheric levels or for the whole profile, this method has been implemented less.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Effect on Cosmic Ray Muons at High Cut-Off Rigidity Station

Maghrabi

Almutayri

2016

Advances in Astronomy

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Cosmic ray data and radiosonde measurements from Riyadh, Saudi Arabia (Rc = 14.4 GV), for the period 2002–2012, were used to study the effect of atmospheric pressure, level of pion production, and temperature at that level, on cosmic ray muons. We found that, even if corrections were made to the detected muons using these three parameters, seasonal variations of the cosmic rays still exist. This suggests that other terrestrial and/or extraterrestrial causes may be considered. The levels of pion production and atmospheric pressure are inversely correlated with the muon rate. On the other hand, the temperature at the pion production level is correlated with muons in spring and winter and inversely correlated in fall and summer. There is no clear explanation for this behavior.

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“…On the other hand, the temperature corrections are slightly more complicated and several methods have been suggested to account for them [e.g., 1 and 3]. These include correlation of the muon rates with one of the following parameters: the atmospheric weighted temperature [4][5], the temperature at ground level [3 and 6], or with the temperature at the level of pion production [7][8][9][10][11].…”

mentioning

confidence: 99%

Correlation between Cosmic Ray muons and atmospheric temperature in the lower stratosphere

Maghrabi¹,

Mutairi²

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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In this study, the relationship between cosmic ray muons and the atmospheric temperature in the lower stratosphere has been investigated and established. Cosmic ray data from the KACST muon detector (Rc= 14.4 GV) and radiosonde measurements from Riyadh airport, for the period 2002-2012, have been used for this purpose. We have found that the temperature in the lower stratosphere is correlated with the cosmic ray muons detected at ground level. The results obtained are in agreement with previous studies. The technique was then used to predict temperature variations in the lower stratosphere. It was found that the temperature can be reproduced with a mean bias error of 0.5 o C and a root mean square error of 3 o C.

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Atmospheric- Weighted Temperature and its influence on Cosmic Ray muons

Cited by 5 publications

References 16 publications

Investigating the Apparent Link between Cosmic Ray Muon Flux, Sudden Stratospheric Warming and Dry Season Rainfall over Jamaica

Investigating the Apparent Link between Cosmic Ray Muon Flux, Sudden Stratospheric Warming and Dry Season Rainfall over Jamaica

Atmospheric Effect on Cosmic Ray Muons at High Cut-Off Rigidity Station

Correlation between Cosmic Ray muons and atmospheric temperature in the lower stratosphere

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