摘要
利用四川121个站自动与人工第2年平行观测降雨量资料,就自动与人工观测的降雨量的差异、引起差异的原因以及自动观测与人工观测的降雨量的相关性进行了分析。结果表明:自动比人工观测的日降雨量平均偏高0.20mm,相对偏高3.1%。测量仪器的不同、空间采样差、观测时间的不一致以及其他原因均会导致自动与人工观测降雨量产生差异,甚至是显著差异。自动观测与人工观测的日降雨量呈线性相关,相关系数为0.9984。
Based on the 2th year＇ s parallel comparison observation rainfall observations respectively by automatic recording and by manual measurement at 121 weather stations in Sichuan Province, various analyses are carried out on rainfall observation difference, the difference cause and relativity between above two observation methods. The results are as follows： ①The average rain amount daily observed by automatic way is 0.20mm （ or 3.1% ） more than that by manual way. ②The distribution difference of rainfall in space, the difference in measurement time of the two observation ways at 20：00BT and other urgent events can result in the rainfall difference in daily data, Different observation instruments and likely one＇ s too low quality can lead to the systematic deviation in above comparing observations. ③The daily rainfall by automatic recording obviously is a linearity function of that by manual observation. The correlation coefficient is 0. 9984.
出处
《高原山地气象研究》
2008年第3期76-80,共5页
Plateau and Mountain Meteorology Research
