四川地区人工观测日照时数与自动观测对比分析

Comparative Analysis Between Artificial and Automatic Observation of Sunshine Duration in Sichuan Province

本文用2019年1~3月四川全省156个国家级地面观测站日照时数平行观测资料,对比评估了自动与人工观测日照时数的小时、日值一致性及分级一致性,分析空间分布规律和不同日照时长对一致性的影响,结果表明:大多数台站人工日照时数略>自动观测,人工观测值较自动值偏小的台站、二者间均方根误差较大、小时相关系数较低的台站均多出现在盆地地区;攀枝花、甘孜、阿坝、凉山(以下简称"攀枝花、三州")等日照充足的地区相较于多阴雨的盆地,人工与自动日照时数更接近;攀枝花、三州区域人工观测在日照时长较长的情况下更准确,盆地区域人工观测在日照时长较短的情况下更准确;日自动日照时数>8h时,人工观测值较自动值易出现偏小,全省人工观测值与自动观测值之间的误差更小,相关性更高;日自动日照时数<8h时,人工观测值较自动值易出现偏大,在2~8h时,全省人工与自动观测值之间的误差更大,相关性也更差。

Using the parallel observation data of sunshine duration from 156 national stations in Sichuan province from January to March 2019,this paper compared and evaluated the consistency between automatic and artificial observations of sunshine duration and the consistency between artificial and automatic sunshine duration at different levels of sunshine duration.The results show that most stations have slightly more artificial sunshine duration than automatic sunshine duration.Stations with positive mean error and larger root mean square error and lower hourly correlation coefficients almost all appeared in basin areas.In areas with sufficient sunshine,such as Pangzhihua,Liangshan,Ganzi and Aba(hereinafter referred to as Panzhihua Sanzhou),artificial sunshine duration is closer to automatic sunshine duration compared with rainy basins.Artificial sunshine duration of stations in Panzhihua Sanzhou are more accurate in longer sunshine duration level.Artificial sunshine duration of stations in Basin are the opposite.When the automatic sunshine duration is greater than 8h,the artificial sunshine duration of most stations are slightly smaller than automatic sunshine duration,the error between them is smaller,and the correlation is higher.When it is less than 8h,the artificial sunshine duration of most stations are larger than the automatic sunshine duration.When the automatic sunshine duration lays between 2-8h,the artificial sunshine duration of most stations have the largest error and the worst correlation with automatic sunshine duration.