Cosmic Ray Intensity Variation and Its Connection with the Total and Spectral Solar Irradiance Gigolashvili Marina, Kapanadze Natela Georgian National Astrophysical Observatory at Ilia Chavchavadze State University, Tbilisi, Georgia

Abstract Variations of the Solar Spectral Irradiance (SSI) and the Cosmic Ray variations using last space observations during by satellite precise devices and ground- based observations of the Cosmic rays in Tbilisi, Oulu and Magadan with standard neutron monitors are investigated.Variations of the Solar Spectral Irradiance (SSI) and the Cosmic Ray variations using last space observations during by satellite precise devices and ground- based observations of the Cosmic rays in Tbilisi, Oulu and Magadan with standard neutron monitors are investigated. By spectral analyses of the time series of the SSI (spectral ranges λ λ 1-7, 30.4, 121.5, , nm) and the cosmic rays variations we have found that the negative correlation exists between the cosmic rays intensity and solar 0.1-7, 30.4, 121.5, nm X-ray flux. Only nm X-ray fluxes are positively correlated with the cosmic rays observed in Tbilisi, Oulu and Magadan.By spectral analyses of the time series of the SSI (spectral ranges λ λ 1-7, 30.4, 121.5, , nm) and the cosmic rays variations we have found that the negative correlation exists between the cosmic rays intensity and solar 0.1-7, 30.4, 121.5, nm X-ray flux. Only nm X-ray fluxes are positively correlated with the cosmic rays observed in Tbilisi, Oulu and Magadan.

Investigations The solar radiation fuels the chemical and dynamical processes of the Earths atmosphere. Any variations in solar radiation will change the atmosphere's structure, temperature, and composition. It is the reason that studies of the Earth require precise and accurate knowledge of both the intensity of solar radiation and the amount by which it varies. The Sun's radiation spans the color spectrum from very energetic x-rays, through the visible, and out to the infrared.The solar radiation fuels the chemical and dynamical processes of the Earths atmosphere. Any variations in solar radiation will change the atmosphere's structure, temperature, and composition. It is the reason that studies of the Earth require precise and accurate knowledge of both the intensity of solar radiation and the amount by which it varies. The Sun's radiation spans the color spectrum from very energetic x-rays, through the visible, and out to the infrared. Statistical analysis on data of total and spectral solar irradianceStatistical analysis on data of total and spectral solar irradiance was carried out during , using the data from the Solar Irradiance Datacenter's website LASP. Solar ultraviolet (UV) irradiance ( nm, Å) originates mostly in the solar photosphere and chromosphere.Solar ultraviolet (UV) irradiance ( nm, Å) originates mostly in the solar photosphere and chromosphere. The solar EUV flux, particularly below 130 nm (1300 Å) originates in the chromosphere, the chromosphere-corona transition region, and the solar corona.The solar EUV flux, particularly below 130 nm (1300 Å) originates in the chromosphere, the chromosphere-corona transition region, and the solar corona.

Objects Our aim is investigation of the TSI, SSI and Cosmic Ray variations using last space observations by different precise devices during Our aim is investigation of the TSI, SSI and Cosmic Ray variations using last space observations by different precise devices during By spectral analyzes of the time series of the solar total and spectral irradiances show large systematic differences in fitting coefficients for solar and space characteristics variation. The purpose of our study is to reveal some similar variations in TSI, SSI and in the Cosmic Ray’s intensity.By spectral analyzes of the time series of the solar total and spectral irradiances show large systematic differences in fitting coefficients for solar and space characteristics variation. The purpose of our study is to reveal some similar variations in TSI, SSI and in the Cosmic Ray’s intensity.

Cosmic Ray’s Intensity for by Oulu Cosmic Ray Station (+65° 1', +25° 28')

Cosmic Ray’s Intensity for by Tbilisi Cosmic Ray Station (+41° 41', +44° 48')

Cosmic Ray’s Intensity for by Magadan Cosmic Ray Station (+59° 34', +150° 48')

Variation of TSI at 1 AU for 25-Feb-2003 to 8-Jul-2008

SSI Data for Wavelength 30.4 nm for 1-Aug-2003 to 5-Jul-2008

SSI Data for Wavelength nm for 1-Aug-2003 to 5-Jul-2008

SSI Data for Wavelength nm for 1-Aug-2003 to 5-Jul-2008

SSI Data for Wavelength nm for 1-Aug-2003 to 5-Jul-2008

SSI Data for Wavelength 312 nm for 1-Aug-2003 to 5-Jul-2008

Method of treatments of observing data We investigated TSI, different spectral ranges in SSI (1-7 nm, 30.4 nm, nm, nm, nm) and Cosmic Ray’s influences by Spectral Analyzes. This data were choose in very huge observational data from Solar Irradiance Datacenter (LISIRD) by several LASP MISSIONS, receiving by Data Access Interface: investigated TSI, different spectral ranges in SSI (1-7 nm, 30.4 nm, nm, nm, nm) and Cosmic Ray’s influences by Spectral Analyzes. This data were choose in very huge observational data from Solar Irradiance Datacenter (LISIRD) by several LASP MISSIONS, receiving by Data Access Interface: For this we developed software programs for selected narrow bands of investigated spectral ranges of SSI.For this we developed software programs for selected narrow bands of investigated spectral ranges of SSI.

Table 1. Correlation coefficients of SSI and TSI with Cosmic Rays variation for different Cosmic Ray Stations Cosmic Ray Station /Wavelength MagadanTbilisiOulu nm nm nm nm nm TSI

Results By analysis of the temporal changes of the high-cadence time series in TSI, SSI and CR revealed anti-correlation between CR and TSI and SSI during investigated period. Only in the case of spectral range nm take place correlation with CRs.By analysis of the temporal changes of the high-cadence time series in TSI, SSI and CR revealed anti-correlation between CR and TSI and SSI during investigated period. Only in the case of spectral range nm take place correlation with CRs.