摘要
大气能见度是最重要的气象学指标之一,其准确观测对气象及相关领域具有重要意义。在实际观测中经常存在器测数据与人工观测数据差异明显的现象,用对比观测期贵阳国家基准气候站的大气能见度仪器观测与人工观测数据分析,结果表明:人工与自动观测数据还是有较好的一致性、相关性。大气无雾、污染环境下,人工观测存在主观差异,能见度观测值偏大,前向散射能见度仪自动观测结果稳定,观测数据接近大气能见度的真实值。在局部雾带、大气受污染环境下,人工观测能见度平均误差低于自动观测数据平均误差。在大气受污染环境下,前向散射能见度仪自动观测的能见度偏小。前向散射能见度仪自身的清洁度等因素对观测值起到了至关重要的影响,在仪器使用过程中应引起足够重视。
Atmospheric visibility is one of the most important indexes of meteorology. Its accurate observation is of great significance to meteorology and the related fields. The difference between the instrumental observation and the artificial observation often occurs. In this study, comparative observations were investigated at the national baseline climate station in Guiyang. The results show that： there is a good consistency and correlation between arti- ficial and automatic observation data ; in the air pollution - free environment, the artificial observation has subjec- tive difference, which often leads to a larger visibility observation value, and the results of the automatic measure- ments are stable, close to the true value ; under the environment of fog and air pollution, the average error of the ar- tificial observation is lower than that of the automatic observation; in polluted atmospheric environment, the visibili- ty of the automatic observations are often lower that the true values ; instrument cleanliness has a critical impact on the observed values, and should be paid more attention in the use of the instrument.
出处
《贵州气象》
2016年第4期81-85,共5页
Journal of Guizhou Meteorology
基金
资助项目:黔气科合KF[2015]07号"前向散射能见度仪应用分析及界定修订阀值研究"
关键词
能见度
主观误差
局部雾带
前向散射能见度仪
visibility
subjective error
local fog
forward scattering visibility meter
