器测与目测能见度差异分析  

Analysis of Difference in Horizontal Visibility between Eyes and Instrumental Observation

作　　者：霍文[1] 王健[1] 刘新春[1] 杨青[1] 梁云[1] 赵晓川[2] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所 [2]新疆气象局环境中心,乌鲁木齐830002

出　　处：《气象科技》2006年第5期638-641,共4页Meteorological Science and Technology

基　　金：国家科技部项目"沙尘暴观测规范和分级标准研究";"沙漠气象及其生态环境的动态评估系统"共同资助

摘　　要：目前大部分气象台站依靠目测来估计能见度值,存在一定的人为误差。利用2004年4月22日至5月29日塔克拉玛干沙漠腹地气象自动站水平能见度观测资料,通过对器测和目测值的数据对比分析得出:①水平器测值约是目测的2倍,变化趋势基本一致;②目、器测值的差异导致沙尘暴发生的等级概率产生偏移;③随着沙尘暴等级减弱,目测值与器测值的平均误差值不断减小,平均绝对误差值和均方误差量级接近甚至达到沙尘暴等级划分标准的量级。By analyzing difference in horizontal visibility observed by Eyes and measurements by FD12 in No. 70 oil well of the Taklernakan desert form April 22 to May 29 in 2004, it is found that ① the values of horizontal visibility by FD12 is the double of those observed by eyes with the identical variation trend; ② the difference results in deviation in the graded probability of sandstorms;③there is a reduction in average errors between FD12 and eyes with decreasing sandstorm grades, and the orders of magnitude of the average absolute error and mean square error are close to, even equal to those of the sandstorm grade standards.

关 键 词：水平能见度 沙尘暴 误差 

分 类 号：P415.12[天文地球—大气科学及气象学]