文档介绍：Solar aspects of papers
Paper intended for BaSc thesis work at Stockholm University, presented June 9, 2008
BACHELOR THESIS WORK
DISCUSSION ABOUT THE POSSIBLE EFFECTS OF THE SOLAR ACTIVITY UPON THE RADIATION BALANCE.
By Jan Olof Jonson
ABSTRACT
In searching for the reasons behind the rising temperature a broad scope of potential triggering factors is currently investigated by the munity.
Among those are the extraterrestrial effects. For the last one-and-a-half century it has been shown that there on the northern hemisphere is a negative correlation between the solar activity and the temperature. However, beginning with the 1990’s, the overall temperature rise has increased to the extent that the correlation has begun to lose significance according to many of the critics of the extraterrestrial effect.
Using satellite data, variations in the irradiance from the sun have also been considered, but the effects have appeared to be too small to offer plete explanation of the temperature rise that has been observed.
Secondary effects of the solar activity have also attained increasing interest, as the direct effects are losing their impact.
It has among others been assumed that the cosmic ray flux might affect the generation of aerosol formation, as decreased solar activity allows for the spread of cosmic rays, thereby increasing cloudiness during minima in solar activity.
Increased cloudiness namely corresponds to a decrease in the solar constant.
The effects of varying cosmic rays have been estimated to be of the same order as the radiative forcing of the increase of CO since 1750. Given our knowledge today it is still difficult to judge, which the main forcing effects behind the increased temperature are. The results attained are still not unambiguous and therefore the need for further research can not be underestimated.
TABLE OF CONTENTS
Introduction – Different opinions about the origins to the climate change
Motives behind the work.
. Basic conce