摘要
利用1971～2010年榆林市12个气象站的气温、降水、光照资料，采用一元线性回归法，分析了近40 a来榆林市光热水气候资料的年代际和季节变化。结果表明，榆林市热量资源丰富，近40 a年平均气温呈波动增加趋势，增温率为0．37℃／10 a，冬季气温波动最大，作物生长季平均气温呈波动增加趋势，增温率为0．29℃／10 a。年降水量较年平均气温波动幅度较小，分布呈南多北少、东多西少；春秋季降水趋于增加，夏季降水不稳定，年际变化大，降雨主要集中在作物生长季节，且夏季具有雨热同季的特点。日照时数西北部多于东南部县区，夏季最多、冬季最少，生长季日照时数占年总量的62．8％。
Abstract
Based on data of temperature, precipitation and sunshine in 12 meteorological stations in Yulin City during 1971-2010, the annu-al and seasonal variation of climate data were analyzed by using linear regression method .The results showed that there was abundant heat re-source in Yulin, the annual average temperature indicated fluctuation trend with an increasing rate of 0.37 ℃/10a, fluctuation was maximum in winter, average temperature in crop growing season fluctuated with an increasing rate of 0.29 ℃/10a.The fluctuation range of annual pre-cipitation was smaller than annual average temperature, precipitation in south and east was more than in north and west, rainfall in summer changed significantly, and mainly concentrated in crop growing seasons.Sunshine hours in northwest were more than that in southeast coun-ties, and were most in summer and least in winter, sunshine hours in growing season accounted for 62.8% of the whole year.
国家科技期刊平台
NSTL
维普
万方数据