Influence of the 11-Year Solar Cycle on Variations of Cosmic Ray Intensity

H., L.; Han, Yulei; Yin, Zhipeng

doi:10.1007/s11207-008-9311-8

Cited by 7 publications

(4 citation statements)

References 25 publications

(1 reference statement)

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“…We mention here only a few representative papers published in the last decade, e.g., Mursula, Zieger, and Vilppola (2003), Mavromichalaki et al (2003), Ruzmaikin, Cadavid, and Lawrence (2008), Kudela (2009), Ma, Han, andYin (2009), Chowdhury, Khan, andRay (2010), Sabbah and Kudela (2011), and references therein. The periodicities of the GCR intensity at first approximation can be divided into three groups: long-, intermediate-(mid-), and short-term quasi-periodicities (see, e.g., Chowdhury, Khan, and Ray, 2010).…”

Section: Introductionmentioning

confidence: 99%

Cycling Changes in the Amplitudes of the 27-Day Variation of the Galactic Cosmic Ray Intensity

Gil

Alania

2012

Sol Phys

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We study quasi-periodical changes in the amplitudes of the 27-day variation of the galactic cosmic ray (GCR) intensity, and the parameters of solar wind and solar activity. We have recently found quasi-periodicity of three to four Carrington rotation periods (3 -4 CRP) in the amplitudes of the 27-day variation of the GCR intensity (Gil and Alania in J. Atmos. Solar-Terr. Phys. 73, 294, 2011). A similar recurrence is recognized in parameters of solar activity (sunspot number, solar radio flux) and solar wind (components of the interplanetary magnetic field, solar wind velocity). We believe that the 3 -4 CRP periodicity, among other periodicities, observed in the amplitudes of the 27-day variation of the GCR intensity is caused by a specific cycling structure of the Sun's magnetic field, which may originate from the turbulent nature of the solar dynamo.

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Section: Introductionmentioning

confidence: 99%

Cycling Changes in the Amplitudes of the 27-Day Variation of the Galactic Cosmic Ray Intensity

Gil

Alania

2012

Sol Phys

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“…The delay between the peaks in sunspot number and the consequent peaks in cosmic ray intensity ranges between 3-10 months (Ma et al, 2009), one year after the cosmic ray intensity peak is necessary to the plant for enhancing rhizome growth and energy storage, while another 7 months are required for the induction of flower development and fruit maturation (Gobert et al, 2001): the whole process may require a period between 22 and 30 months. Thus, from the beginning of the second summer after the solar activity peak, the plant is ready for sexual reproduction, and the warm conditions during the following months may just play the final regulatory role in order to ensure flower appearance at the end of the summer, as confirmed by the significant correlation found between flowering prevalence and mean summer air temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Peaks in solar activity show a periodicity of about 11-years (Ma et al, 2009); boosting cosmic and UV rays, they reduce cloud formation and runoff, and increase irradiance and Earth temperature (McCabe & Wolock, 2008). Increases of sea surface temperature linked to peaks in solar activity have been particularly evident (Southward et al, 1995;Roy & Haigh, 2009).…”

Section: Introductionmentioning

confidence: 99%

Flowering of the seagrass Posidonia oceanica in NW Mediterranean: is there a link with solar activity?

et al. 2013

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Time series analysis of the leaf biometry and rhizome production of the endemic Mediterranean seagrass Posidonia oceanica (L.) Delile was performed for a meadow in the Ligurian Sea (NW Mediterranean) in order to assess changes in plant growth during a massive flowering event that occurred in 2003 and coincided with the warmest summer temperatures recorded in the last centuries. P. oceanica exhibited the highest values of leaf surface area during the flowering year and the highest values of rhizome production in the previous year. The years immediately following the flowering event were characterized by a decrease in both parameters. Comparison of the years of massive flowering events reported in the literature for the entire Mediterranean with the historical series (spanning the last 50 years) of air temperature and sunspot number suggests that intense solar activity, and not warmer temperature per se, is likely to be the main trigger of massive Posidonia oceanica flowering events.

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“…Currently, many advanced approaches using nonlinear analysis, such as those involving the wavelet transform methods, cross-recurrence plots (CRPs) and so on, are widely used to study the nonlinear behavior of solar activities. Over the last few years, there have been many applications with approaches of nonlinear analysis in scientific research, and they have been demonstrated to have unprecedented prowess in revealing hidden physical meanings in data (Frick et al 1997a,b;Grinsted et al 2004;Ma et al 2009;Johnson 2010;Gao et al 2011Gao et al , 2012Xie et al 2012;Li et al 2008Li et al , 2009bLi et al , 2010aLi & Liang 2010;and references therein).…”

Section: Introductionmentioning

confidence: 99%

Phase analysis of sunspot group numbers on both solar hemispheres

Deng¹,

Qu²,

Yan³

et al. 2013

Res. Astron. Astrophys.

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Cross-correlation analysis and wavelet transform methods are proposed to investigate the phase relationship between the monthly sunspot group numbers in the solar northern and southern hemispheres. It is found that (1) the monthly sunspot group numbers in the northern hemisphere begin two months earlier than those in the southern one, which should lead to phase asynchrony between them but with a slight effect; (2) the Schwabe cycle length for the monthly sunspot group numbers in the two hemispheres obviously differs from each other, and the mean Schwabe cycle length of the monthly sunspot group numbers in the northern hemisphere is slightly larger than that in the southern one; (3) the monthly sunspot group numbers in the northern hemisphere precede those in the southern hemisphere during the years of about 1874–1927, after which, the southern hemisphere leads the northern hemisphere in the years 1928–1964, and then the northern hemisphere leads in time till the present.

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Influence of the 11-Year Solar Cycle on Variations of Cosmic Ray Intensity

Cited by 7 publications

References 25 publications

Cycling Changes in the Amplitudes of the 27-Day Variation of the Galactic Cosmic Ray Intensity

Cycling Changes in the Amplitudes of the 27-Day Variation of the Galactic Cosmic Ray Intensity

Flowering of the seagrass Posidonia oceanica in NW Mediterranean: is there a link with solar activity?

Phase analysis of sunspot group numbers on both solar hemispheres

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