【摘要】 利用京、津、冀区域内1961～2007年70个气象观测站点系统的气象观测资料,对河北省≥0℃、10℃界限温度的初日、终日、初终间日数、积温的空间变化、年际变化、年代际变化进行了分析。结果表明:近50年来,全省及各区域≥0℃、10℃界限温度总的变化趋势表现为,初日提前、终日推迟、初终间日数延长、积温增加。20世纪70年代,全省及各区域≥0℃、10℃的积温偏少,80年代后呈逐年代增加的趋势。21世纪初的近几年热量资源最充沛,近几年比60年代分别增加了271.5、259.8℃。更多还原

【Abstract】 Using the climate data got from the 70 observation stations in Beijing,Tianjin,and Hebhei origin,we analyzed the changes of the first and last day and the interval of them with the daily temperature above 0℃,10℃ stably,the change of the accumulated temperature in different region and also in different years and decades.The results indicated,in the recent 50 years,the boundary temperature of ≥0℃ and 10℃ in the whole province and in various regions change tendency performance showed the first day was moving up,the last day came later,the intervals from the first and the last day became longer,accumulated temperature increasd.In 70′s of 20th century,the accumulated temperature of ≥0℃ and 10℃ in the whole province and in different origin were few,but after the 80′s there was an increasing trend year by year.At the beginning of the 21st century the heat resources were more abundant.It respectively increased by 271.5℃,259.8 ℃ than the 60′s of zoth century.更多还原