摘要
利用2009年5月至2009年11月鞍山、沈阳、本溪、抚顺4个市区的器测能见度和人工观测能见度资料,分别按照不同气象要素和天气现象等情形下,对两种观测数据资料的差异进行了详细的统计分析。结果表明:与无视程障碍天气情形相比,出现具有视程障碍天气情形时,器测、目测能见度差异较小;总云量越多,两种观测值差异越小;PM10质量浓度与能见度呈负相关,对能见度器测影响大于对目测的影响;在目测能见度为1～10 km的情形下,器测、目测能见度差值相对最小;随着能见度的降低,目测值与器测值的平均绝对误差值有减小趋势。
Using the instrumental and visual visibility data from May 2009 to November 2009 from Anshan,Shenyang,Benxi,and Fushun,which are all situated in the urban area of the central Liaoning Province,a detailed statistic analysis is made of the differences between two visibility measurements,in accordance with weather elements and weather phenomena.The results indicate that under the weather condition that there was obstruction to vision,the differences between instrumental and visual visibilities were relatively lower;the more the total cloud cover,the smaller the difference between two observations;the concentration of PM10 was negatively correlated with visibility,and its effect on the visual visibility was greater than that on the instrumental visibility;when the visual visibility was within the range of 1 km to 10 km,the difference between the instrumental and visual visibility measurements was the least;the average absolute errors of both visual instrumental measurements tended to decrease with the decreasing visibility.
出处
《气象科技》
北大核心
2011年第4期468-472,共5页
Meteorological Science and Technology
基金
中国气象局沈阳大气环境研究所项目"大气能见度器测和目测的比较"资助
关键词
能见度
器测
目测
平均绝对误差
标准偏差
visibility
instrumental measurement
visual measurement
average absolute error
standard deviation
