自动站与人工站气压记录分析评估

Analysis and Assessment of Errors in AWS and Manual Pressure Records in Pingxiang

利用2005年1月至12月凭祥站自动与人工第二年平行观测气压资料,就自动与人工观测气压的差值及引起差异的原因进行了分析。结果表明:(1)自动观测气压值比人工观测气压值,日平均值普遍偏低0.3～0.4hPa。日最低气压在5～6月高温期差值最大,有时可达到1.3 hPa。(2)自动与人工观测气压的差值具有明显的日变化和季节变化。(3)自动与人工观测气压值主要分布在0.3～0.4hPa之间,在业务规定允许误差范围内(4)人工操作不当读数误差;观测时间不一致;仪器性能误差;自动观测在高温状况下的非线性以及其他原因均会导致自动与人工观测气压产生差异。

The analysis are conducted by means of AWS（Automatic Weather Station） and manually observed pressure data from January 2005 to December in Pingxiang,so to identify the difference between AWS（Automatic Weather Station） and manually observed pressure data.The results indicate that（1） The AWS and manual daily mean records are generally lower 0.3 ～0.4hPa.The difference of minimum pressure data is maximum,and the data could reach 1.3 hPa.（2） The difference between AWS and manually pressure data displayed obviously daily and seasonal variations.（3） The distribution of data is between 0.3 ～0.4hPa,and the error is within the range of the service standard.（4） the manual disoperation,the different observation time;the instrument error,the nonlinearity of AWS observation in high temperature and other reasons could result in the difference between AWS and manual pressure records