自动观测与人工观测能见度的差异性分析及检验

Difference analysis and test of horizontal visibility between automatic observation and manual observation

利用安徽省安庆气象观测站2012年自动观测与人工观测能见度资料,分析不同观测时次和不同天气现象的自动观测与人工观测能见度的差异性。采用相关系数法计算不同情形下的自动观测与人工观测能见度的相关性。通过差值的统计特征分析不同观测时次和不同天气现象的自动观测与人工观测能见度的差异性,并利用符号检验法和Wilcoxon秩检验法对两者的差异性进行假设检验。结果表明,不同观测时次的自动观测和人工观测能见度近似呈完全正相关性,不同天气现象的自动观测和人工观测能见度的相关性也较高;不同观测时次和不同天气现象的自动观测和人工观测能见度均存在显著性差异。

According to the horizontal visibility data observed by manual and automatic ways of Anqing meteorological station in 2012, differences between them were analyzed from two aspects： different observation time and different weather phenomena. Correlation of visibility between manual and automatic observations was calculated using correlation coefficient method. Differences between them were also analyzed with its statistical characteristics and hypotheses tested by the way of sign test and Wilcoxon rank sum test. The results showed that a positive association can be obtained between visibility detected by manual observation and automatic one in different times, and a significant correlation is also found under different weather. The difference of visibility between them is notable when times and weather are different.