Scientists using satellite observations have found that the current solar cycle ends abnormal changes of the solar spectrum, which leads to warming of the earth amid declining solar activity, reported in the journal Nature.
Received during the three-year experimental data do not allow researchers to judge whether such an anomalous behavior of the Sun took place in the past and may affect the climate in the future. Scientists note that people still know very little about the mechanisms of the effect of solar activity on the climate.
Authors of the publication, the team led by Joanna Hay (Joanna Haigh) from Imperial College London, analyzed the daily observations of the spectrum of solar radiation, which took place from 2004 to 2007, the satellite NASA SORCE (Solar Radiation and Climate Experiment). Scientists have found that a general lowering of the intensity of the activity of stars visible spectrum markedly increased, and the UV component was less intense.
Sudden change in solar activity coincided with unusual warming of the planet over the years. The peak of solar activity in this cycle occurred in 2001, reaching a minimum in 2009.
Despite the fact that the study of solar activity cycles conducted by astrophysicists almost since the invention of the telescope in the 17th century, the detailed data on the dynamics of the solar light was not available until recently. Scientists had only an empirical model of the solar radiation, using as parameters, the number and size of sunspots. Scientists discovered changes in the solar spectrum are very different from the predicted model. Due to redistribution of the intensity of radiation of different wavelengths of the total amount of solar energy that comes to the surface of the Earth has increased, despite the decline in activity.
Changing the composition of the solar spectrum has also affected the ozone layer of the atmosphere, which is more delicate than 45 kilometers above sea level. The concentration of ozone in a high-altitude region of the atmosphere has increased. Weather this was done by simulation, and subsequently confirmed by satellite data.
"The observed correlations in our climate temperature and thickness of the ozone layer may be pure coincidence, but the unexpected data is too important not to make them available now," — reported the online edition of High Nature News.
Scientists admit that the current solar cycle may be different from the previous ones, for unknown reasons, yet, so a better understanding of the observed processes require additional monitoring.
"If the peak of solar activity are out of phase with maximum incoming solar energy to the Earth, it could cause us to reconsider many of the paradigm of how atmospheric processes affecting the global climate," — said Michael Lockwood (Michael Lockwood), an independent expert from the University of Reading in the UK.
At the same time, the authors of the publication said that the detected anomalies are not shaking the foundation for the theory of global warming, as you make changes in solar activity cycles, albeit very visible, are of short duration, while the greenhouse effect has been observed for decades.