连城县1958—2019年气候变化特征分析

Analysis on the Characteristics of Climate Change in 1958 to 2019 in Liancheng County

根据连城县1958—2019年地面观测资料,采用气候统计方法,对连城县1958—2019年气候变化特征进行分析。结果表明:近62年来,连城县年平均气温、平均最高气温和平均最低气温显著递增,年平均气温在1997年发生突变。年降水量增多,日降水量≥0.0 mm降水日数、日降水量≥0.1 mm降水日数、小雨日数和中雨日数减少,大雨日数和日降水量≥50.0 mm暴雨日数增加,降水量序列主要存在时间尺度5年、7年、19年、32年左右等4个振荡周期。年日照时数在显著减少,总云量、低云量、降水量、日降水量≥0.0 mm降水日数和相对湿度对日照时数变化的影响较大,轻雾日数及雾日数对日照时数变化的影响较小。总云量、蒸发量及相对湿度减少,低云量增加。连城县雾日数、轻雾日数和飑线日数呈增加趋势,雷暴日数、闪电日数、霜日数、结冰日数、降雪日数和大风日数呈减少趋势。

according to the ground observation data of Liancheng County 1958~2019,the characteristics of climate change in Liancheng County 1958~2019 were analyzed by climate statistics method.The results show that in recent 62 years,the annual mean temperature,mean maximum temperature and mean minimum temperature of Liancheng County are increasing significantly,and the annual mean temperature has changed in 1997.The annual precipitation is increasing,the daily precipitation≥0.0mm the precipitation days,the daily precipitation≥0.1mm the precipitation days,the light rain days and the moderate rain days are decreasing,the heavy rain days and the daily precipitation≥50.0mm the rainstorm days are increasing,and the precipitation sequence mainly has four oscillation cycles,such as time scale 5 years,7 years,19 years and 32 years.the annual sunshine hours were significantly reduced.the total cloud volume,low cloud volume,precipitation,the daily precipitation≥0.0mm the precipitation days and relative humidity had a greater effect on the change of sunshine hours,and the number of light fog days and fog days had a smaller effect on the change of sunshine hours.Total cloud volume,evaporation and relative humidity are decreasing,and low cloud volume is increasing.The number of days of fog,the number of days of light fog and the number of days of winding line in Liancheng County showed an increasing trend,and the number of days of thunderstorm,lightning,frost,ice,snow and wind decreased.