三门峡市近50年气候变化及对农作物的影响

利用三门峡市1960—2009年逐月气温、积温、降水、日照时数、蒸发量、无霜期等气象资料,采用线性方程、累积距平法、气候倾向率等方法,分析了该市近50年的气候变化特征.结果表明:50年来,三门峡市气温在波动中呈现上升的趋势;极端最高气温下降,高温日数减少,极端最低气温的强度减弱,持续时间缩短,冬暖夏凉趋势明显;年降水量在波动中减少,年际波动较大;年日照时数和年蒸发量总体呈减少趋势;无霜期日数变化较大.根据气候变化情况,简单分析了当地气候变化对主要农作物的影响.

The Climate Change in Sanmenxia City in Nearly 50 Years and Its Impact on Crop

According to the data of monthly average temperature,accumulated temperature,precipitation,sunshine hours,evaporation,frostless period,and so on in Sanmenxia City during 1960—2009,the author analyzed the climatic changeable feature of Sanmenxia in the recent 50 years by using linear equation,the cumulative average method,and climatic tendency method.In the recent 50 years,the temperature of Sanmenxia City gradually increased.The extreme maximum temperature decreased,and the high temperature days reduced.The intensity of extreme minimum temperature became weaker and its duration days decreased.Winter became warmer and summer became colder.The precipitation decreased gradually,with large interannual fluctuations.The annual sunshine hours and the annual evaporation decreased.The frost-free days changed a lot in this period.According to the climate changes,the impacting on main crops was analyzed.