Deep solar minimum and global climate changes

This paper examines the deep minimum of solar cycle 23 and its potential impact on climate change. in addition, a source region of the solar winds at solar activity minimum, especially in the solar cycle 23, the deepest during the last 500 years, has been studied. solar activities have had notable effect on palaeoclimatic changes. contemporary solar activity are so weak and hence expected to cause global cooling. prevalent global warming, caused by building-up of green-house gases in the troposphere, seems to exceed this solar effect. this paper discusses this issue.