Variability of Low Energy Cosmic Rays Near Earth

Kudela, K.

doi:10.5772/37482

Cited by 7 publications

(4 citation statements)

References 171 publications

(131 reference statements)

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“…Short-term oscillations of galactic cosmic ray (CR) particles are reported by Mavromichalaki et al (2003), Alania et al (2008), Chowdhury et al (2010), Sabbah and Kudela (2011), Kudela (2012), Singh et al (2012), Modzelewska and Alania (2013), Singh and Badruddin (2015), while short-term oscillations of geomagnetic indices are reported by Nayar et al (2002), Singh and Badruddin (2014), Chowdhury et al (2015) and many others. The variability of cosmic rays near earth is summarized by Kudela (2012). Alania et al (2008) reported the relationship between the synodic periods of the CR particles and anisotropy with the similar changes of the solar wind velocity.…”

Section: Introductionmentioning

confidence: 88%

“…Shortterm periodicities of solar wind parameters are reported by many researchers e.g., Mursula and Zieger (1996), Nayar et al (2002), Katsavrias et al (2012), Singh et al (2012), Kim and Chang (2014), Singh and Badruddin (2014), Chowdhury et al (2015). Short-term oscillations of galactic cosmic ray (CR) particles are reported by Mavromichalaki et al (2003), Alania et al (2008), Chowdhury et al (2010), Sabbah and Kudela (2011), Kudela (2012), Singh et al (2012), Modzelewska and Alania (2013), Singh and Badruddin (2015), while short-term oscillations of geomagnetic indices are reported by Nayar et al (2002), Singh and Badruddin (2014), Chowdhury et al (2015) and many others. The variability of cosmic rays near earth is summarized by Kudela (2012).…”

Section: Introductionmentioning

confidence: 92%

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Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima

Singh

Badruddin

2015

Astrophys Space Sci

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The behavior of short-term oscillations (≤one solar rotation) of the solar-wind parameters, galactic cosmic rays and geomagnetic indices are discussed during the last two solar minima between cycles 22/23 and cycles 23/24. There are strong signatures of short-term oscillations of all the selected time series during the early phase of the minima, where the high speed streams are prominent structures in the heliosphere and these signatures almost die out at the end of the two minima. Result also suggests that the second and third harmonics of one solar rotation period of few parameters are prominent during the minimum between the cycles 22 and 23. Moreover, all the sub-harmonics/quasioscillations are more consistent and deviate less during the recent deep prolonged minimum. Through this work, we are reporting ∼7.1 days, ∼5.5 days, ∼4.4 days, ∼3.3 days oscillations, observed in few solar-wind parameters [interplanetary magnetic field (B), RMS standard deviation in the magnetic field (σ B ), southward component of magnetic field (Bz) and electric field (Ey)] and geomagnetic (D sT and AE) parameters during the solar minimum between cycles 23 and 24, in addition to ∼1.9 days oscillations which is observed in Bz, Ey and AE parameters.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 92%

Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima

Singh

Badruddin

2015

Astrophys Space Sci

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“…Both regular and quasiperiodic (e.g., diurnal, ∼27 day, ∼11 year) variations are connected with solar activity and provide information about the structure of interplanetary magnetic field and on the solar wind in the heliosphere. More detailed reviews on cosmic ray variations can be found in [36,37] and in monographs [38,39]. The research of cosmic ray variations requires long-time series of homogeneous measurements.…”

Section: Ground-based Observations Of Cr Variability and Scrmentioning

confidence: 99%

Cosmic Ray Investigation in the Stratosphere and Space: Results from Instruments on Russian Satellites and Balloons

Logachev

Lazutin

Kudela

2013

Advances in Astronomy

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Selected activities aimed to investigate cosmic ray fluxes and to contribute to the understanding of the mechanisms behind, over a long-time period using space research tools in the former USSR/Russia and Slovakia, are reviewed, and some of the results obtained are presented. As the selection is connected with the institutes where the authors are working, it represents only a partial review of this wide topic.

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“…Moreover, many authors have found inconsistencies in using the neutron monitor “Jungfraujoch” in Switzerland as a reference for the incoming cosmic‐ray flux at different periods and locations on Earth (e.g., Hands et al., 2021; Hawdon et al., 2014; Schrön, 2017). The main reason is the dependence of the cosmic‐ray flux on the geomagnetic field, which changes continuously in space and time (Belov et al., 2005; Herbst et al., 2013; Kudela, 2012). To account for that, authors suggested different correction approaches to rescale data from a neutron monitor site to a CRNS location (Hawdon et al., 2014; McJannet & Desilets, 2023), while their performance is yet to be tested.…”

Section: Introductionmentioning

confidence: 99%

Buoy‐Based Detection of Low‐Energy Cosmic‐Ray Neutrons to Monitor the Influence of Atmospheric, Geomagnetic, and Heliospheric Effects

Schrön,

Rasche,

Weimar

et al. 2024

Earth and Space Science

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Cosmic radiation on Earth responds to heliospheric, geomagnetic, atmospheric, and lithospheric changes. In order to use its signal for soil hydrological monitoring, the signal of thermal and epithermal neutron detectors needs to be corrected for external influencing factors. However, theories about the neutron response to soil water, air pressure, air humidity, and incoming cosmic radiation are still under debate. To challenge these theories, we isolated the neutron response from almost any terrestrial changes by operating a bare and a moderated neutron detector in a buoy on a lake in Germany from July 15 to 02 December 2014. We found that the count rate over water has been better predicted by a theory from Köhli et al. (2021, https://doi.org/10.3389/frwa.2020.544847) compared to the traditional approach from Desilets et al. (2010, https://doi.org/10.1029/2009wr008726). We further found strong linear correlation parameters to air pressure (β = 0.0077 mb−1) and air humidity (α = 0.0054 m3/g) for epithermal neutrons, while thermal neutrons responded with α = 0.0023 m3/g. Both approaches, from Rosolem et al. (2013, https://doi.org/10.1175/jhm‐d‐12‐0120.1) and from Köhli et al. (2021, https://doi.org/10.3389/frwa.2020.544847), were similarly able to remove correlations of epithermal neutrons to air humidity. Correction for incoming radiation proved to be necessary for both thermal and epithermal neutrons, for which we tested different neutron monitor stations and correction methods. Here, the approach from Zreda et al. (2012, https://doi.org/10.5194/hess‐16‐4079‐2012) worked best with the Jungfraujoch monitor in Switzerland, while the approach from McJannet and Desilets (2023, https://doi.org/10.1029/2022wr033889) was able to adequately rescale data from more remote neutron monitors. However, no approach was able to sufficiently remove the signal from a major Forbush decrease event on 13 September, to which thermal and epithermal neutrons showed a comparatively strong response. The buoy detector experiment provided a unique data set for empirical testing of traditional and new theories on Cosmic‐Ray Neutron Sensing. It could serve as a local alternative to reference data from remote neutron monitors.

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Variability of Low Energy Cosmic Rays Near Earth

Cited by 7 publications

References 171 publications

Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima

Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima

Cosmic Ray Investigation in the Stratosphere and Space: Results from Instruments on Russian Satellites and Balloons

Buoy‐Based Detection of Low‐Energy Cosmic‐Ray Neutrons to Monitor the Influence of Atmospheric, Geomagnetic, and Heliospheric Effects

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