Analysis on Climate Change Features of Ningjin County

By the meteorological date during 1971—2007,discipline of temperature and precipitation variations of Ningjin county were analysed.The results showed that the annual average temperatures,the annual average maximum temperatures and the annual average minimum temperatures had an inereasing trend since the late 1980s,an upward trend was accelevated in late 1990 s,it was the most obvious in the winter and spring.Annual average temperatures increased by 0.44 degrees every ten years,but annual average minimum temperatures increased by 0.50 degrees every ten years,its rising trend was higher than the former.As a whole,the annual mean precipitation showed a downtrending,mainly summer precipitation decreased significantly.