Transitional solar dynamics, cosmic rays and global warming

TL;DR

This paper analyzes historical solar activity changes, linking them to Earth's climate variations, and suggests a scenario where transitions in solar dynamics influence global warming, considering cosmic rays and chaotic climate behavior.

Contribution

It introduces a new analysis of solar cycle clustering changes and their impact on climate, proposing a scenario connecting solar transitions with global warming and cosmic rays.

Findings

Historic period shows strong clustering of solar activity; Modern period exhibits white-noise behavior.

Transition around 1933-1944 significantly impacted Earth's climate.

Galactic cosmic rays and chaotic dynamics are relevant to climate variability.

Abstract

Solar activity is studied using a cluster analysis of the time-fluctuations of the sunspot number. It is shown that in an Historic period the high activity components of the solar cycles exhibit strong clustering, whereas in a Modern period (last seven solar cycles: 1933-2007) they exhibit a white-noise (non-)clustering behavior. Using this observation it is shown that in the Historic period, emergence of the sunspots in the solar photosphere was strongly dominated by turbulent photospheric convection. In the Modern period, this domination was broken by a new more active dynamics of the inner layers of the convection zone. Then, it is shown that the dramatic change of the sun dynamics at the transitional period (between the Historic and Modern periods, solar cycle 1933-1944yy) had a clear detectable impact on Earth climate. A scenario of a chain of transitions in the solar convective zone is suggested in order to explain the observations, and a forecast for the global warming is suggested on the basis of this scenario. A relation between the recent transitions and solar long-period chaotic dynamics has been found. Contribution of the galactic turbulence (due to galactic cosmic rays) has been discussed. These results are also considered in a content of chaotic climate dynamics at millennial timescales.