Climate change implies a statistically significant in the long-term mean state or characteristics of variability climate elements. It can be caused by natural and/or anthropogenic factors. Recent global warming is often cited as an example human-induced change. Global refers to increasing trend average surface temperature Earth, defined annual ocean, usually depth 30-100 cm, and air above land ...

this analysis was conducted on 31 synoptic stations in iran. initially, the mann-kendall test was administered in order to analyse the trend of alterations of these two components over time and the results suggest that 16% of the stations show significant relationship with annual precipitation (positive and negative). more stations showed significant relationships between sunspots and minimum a...