摘要
利用阳江气象站2013年7月至2014年3月的观测资料,分阶段探讨了M6000型能见度仪与人工观测能见度的差值特征及其造成原因,并探索了提高能见度仪观测质量的方法。结果显示：两者的差值主要集中在-2.0~3.0km之间,且差值的绝对值随着能见度的增大而增大;总体上差值正常的时次占90%,在有天气现象时,自动观测能见度偏小比较明显,能见度小于等于5km时负误差率最大,平均差值为负值且异常率最高。造成两者存在差值的原因是多方面的,除了人工观测的主观习惯性误差外,两者在概念、测量原理上的不同和仪器的维护不当也是造成差异的原因之一。通过加强能见度仪的日常维护,可以提高自动观测能见度的质量,用自动观测能见度来判断霾天比较接近实际,在雾天通过对自动观测值作适当的正向修正,也能提高两者的一致性,基本能够满足能见度自动化观测的要求。
By means of the visibility measurements from July 2013 to March 2014 at Yangjiang,the difference characteristics in visibility between M6000 visibility sensor and manual observation and the causes are explored in order to improve the visibility observation quality.The results show that the difference is mostly between-2.0and 3.0km,and the absolute value of the difference increases with visibility;generally,the difference is normal in 90% of cases,but in bad weather,the automatic observation visibility is smaller,and the mean difference is negative and the error rate reaches the maximum when the visibility is less than 5km.It is found that the causes of the difference,in addition to the habits and subjectivity of observers,include also the improper maintenance of the instrument and the differences between the concepts and measuring principles of the observation instruments. By strengthening the routine visibility sensor maintenance,the quality of automatic visibility observation can be improved.The automatic visibility observation can be well used to determine haze days,and in fog weather,the automatic observations can be used to make appropriate amendments to improve the consistency,so to basically meet the requirements of automatic visibility observation.
出处
《气象科技》
北大核心
2015年第4期595-600,共6页
Meteorological Science and Technology
