ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE
Abstract. The influence of variations in galactic cosmic rays (GCR) on climate change has been analyzed for the time intervals of thousands and tens of thousands of years. It has been shown that in the last millennium quasi-two-hundred-year variations in the GCR intensity (variations in the cosmogen...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.533.8239 2023-05-15T16:29:51+02:00 ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.8239 http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.8239 http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf text ftciteseerx 2016-01-08T10:43:52Z Abstract. The influence of variations in galactic cosmic rays (GCR) on climate change has been analyzed for the time intervals of thousands and tens of thousands of years. It has been shown that in the last millennium quasi-two-hundred-year variations in the GCR intensity (variations in the cosmogenic 14C isotope concentration in dated tree rings) modulated by solar cyclicity (the ~210-year cycle) correlated well with climate change (temperature and precipitation variations). The correlation coefficient between variations in GCR and climate parameters for different regions of the Earth has been found to range from 0.58 to 0.95. Analysis of variability in the concentration of the cosmogenic 10Be isotope (that also reflects the GCR flux variability) in Greenland ice for the time interval from 20,000 to 50,000 years ago has revealed that the 10Be concentration is modulated by the quasi-two-hundred-year solar cycle. Comparison of variations in the cosmogenic 10Be isotope concentration with changes in the magnitude of the virtual axial dipole moment (VADM) of the geomagnetic field has shown that the envelope of the 10Be concentration amplitude correlates well with the VADM variations. Thus, it can be concluded that long-term solar activity and geomagnetic dipole variations exert a combined influence on the GCR fluxes that enter the Earth’s atmosphere and affect the climate. A decrease in the geomagnetic dipole leads to an enhancement of the total GCR flux on the one hand and an increase in the depth of modulation of the GCR fluxes caused by solar activity variability on the other hand. 1 Text Greenland Unknown Greenland |
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Abstract. The influence of variations in galactic cosmic rays (GCR) on climate change has been analyzed for the time intervals of thousands and tens of thousands of years. It has been shown that in the last millennium quasi-two-hundred-year variations in the GCR intensity (variations in the cosmogenic 14C isotope concentration in dated tree rings) modulated by solar cyclicity (the ~210-year cycle) correlated well with climate change (temperature and precipitation variations). The correlation coefficient between variations in GCR and climate parameters for different regions of the Earth has been found to range from 0.58 to 0.95. Analysis of variability in the concentration of the cosmogenic 10Be isotope (that also reflects the GCR flux variability) in Greenland ice for the time interval from 20,000 to 50,000 years ago has revealed that the 10Be concentration is modulated by the quasi-two-hundred-year solar cycle. Comparison of variations in the cosmogenic 10Be isotope concentration with changes in the magnitude of the virtual axial dipole moment (VADM) of the geomagnetic field has shown that the envelope of the 10Be concentration amplitude correlates well with the VADM variations. Thus, it can be concluded that long-term solar activity and geomagnetic dipole variations exert a combined influence on the GCR fluxes that enter the Earth’s atmosphere and affect the climate. A decrease in the geomagnetic dipole leads to an enhancement of the total GCR flux on the one hand and an increase in the depth of modulation of the GCR fluxes caused by solar activity variability on the other hand. 1 |
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title |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
spellingShingle |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
title_short |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
title_full |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
title_fullStr |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
title_full_unstemmed |
ON A COMBINED INFLUENCE OF LONG-TERM SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DIPOLE CHANGES ON CLIMATE CHANGE |
title_sort |
on a combined influence of long-term solar activity variations and geomagnetic dipole changes on climate change |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.8239 http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf |
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Greenland |
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Greenland |
op_source |
http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.533.8239 http://ruby.fgcu.edu/Courses/Twimberley/EnviroPhilo/Geomagnetic.pdf |
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