甘肃省自动气象站气压记录分析评估

Analysis and Assessment of Errors in AWS Pressure Records in Gansu Province

为了掌握因仪器换型造成的气象要素观测值的变化,客观评价气象资料的连续性、准确性,利用甘肃省6个基准站的自动气象站气压资料和人工站对应的平行观测资料对自动站记录进行了对比分析。结果表明,自动站气压记录与人工站记录年平均、月平均统计值十分接近,定时值、平均值、最高记录、最低记录的误差概率分布形态基本一致,概率分布比较集中。统计检验表明,气压定时观测记录、最高记录、最低记录、24次平均值和4次平均值均无显著差异;各定时记录的误差有明显的日变化,09:00~11:00、19:00~22:00误差大,12:00~15:00、01:00~05:00误差小;6个站间的误差差异明显,但个别站的误差有明显的系统性,反映了观测仪器自身的性能。

The comparison and analysis are conducted by means of AWS(Automatic Weather Station) and manually observed pressure data from six stations in Gansu,so to identify the change resulted from the renewal of observation instruments and assess objectively the continuity and accuracy of observation data.The results indicate that AWS and manual records are very close in annual and monthly averages;the probability distributions of errors in regular,average,maximum,and minimum records are basically identical and rela...