石河子市近57年积温变化趋势特征研究

利用石河子市57年的地面气温资料,分析了近57年石河子市≥0℃、日均温≥10℃积温变化趋势,并探讨了积温变化对农业生产的影响。近57年来,石河子市≥0℃日均温初日提前不明显,终日延迟10d,持续日数延长约13d,≥0℃积温增加538.1℃;≥10℃初日提前10d,终日推后21d,持续日数延长30d,≥10℃积温增加626.4℃;后20年平均值与前20年相比,≥0℃、≥10℃持续日数分别延长8d、15d,≥0℃、≥10℃积温分别平均增加376.6℃、427.27℃。总体而言,石河子市近57年≥0℃和≥10℃积温变化均为增加趋势,且近20年二者增加的趋势较前20年更为明显。该研究可为当地掌握热量资源变化特征及调整农业布局提供理论依据。

The variation tendency of accumulated temperature of Shihezi City in recent 57 years

Based on the surface temperature data of Shihezi City in recent 57 years,we analyzed the change trend of ≥0℃ and ≥10℃ accumulated temperature by means of climatic statistics methods,and discussed the effects of accumulated temperature variation on agricultural production.In recent 57 years,the first day with temperature ≥0℃ was advanced slightly,and the last day was prolonged with 10 days,while sustained days was prolonged with 13 days,and ≥0℃ accumulated temperature was increased by 538.1℃.Meanwhile,the first day with temperature ≥10℃ was advanced by 10days,and the last day was put off 21days,while sustained days was prolonged with 30days,and ≥10℃ accumulated temperature was increased by 626.4℃.Compared with the first 20 year,sustained days with temperature ≥0℃ and ≥10℃ ware prolonged 8days and 15days in the last 20 years,and ≥0℃ and ≥10℃ accumulated temperature were increased by 376.6 and 427.27℃,respectively.In a word,during recent 57 years,both ≥0℃ and ≥10℃ accumulated temperature of Shihezi City were increasing,and those in the last 20 years increased more obvious than the former 20 years.This study could provide theoretical foundation for grasping heat resource change characteristics and adjusting agriculture distribution.