辽宁中部地区大气能见度器测与目测数据的对比分析

以辽宁中部地区沈阳、鞍山、本溪3个城市为研究对象,利用2010年全年的高精度仪器观测与人工定时观测能见度资料,对这2种观测方法进行了对比分析,研究了二者的差异与相关性. 结果表明,从辽宁中部地区全年总体来看,虽然平均器测能见度大于平均目测能见度,但目测能见度在一年中的大部分时间大于器测能见度(所占日数比例为59.5%). 各城市之间器测能见度的相关系数比目测能见度高,2种方法的观测结果较为一致地反映出能见度在午后会达到高值. 2种方法观测的能见度均与大气相对湿度和可吸入颗粒物质量浓度表现为负相关关系,其中目测能见度与相对湿度的负相关性更为显著,而器测能见度与颗粒物质量浓度的相关性更为显著. 

Comparative Analysis of Atmospheric Visibility Data from the Middle Area of Liaoning Province Using Instrumental and Visual Observations

Based on atmospheric visibility data from both instrumental and visual observations in Shenyang City, Anshan City and Benxi City in Liaoning Province in 2010, the discrepancy and correlation between the two methods were studied by means of comparative analysis. The results indicated that in general, the mean visibility obtained from the instrumental observation was better than that obtained from the visual observation in the middle area of Liaoning Province. However, the proportion of days in which the diurnal visibility from the visual observation was higher than that from the instrumental observation was 59.5%. The correlation between instrumental observation and visibility was better than that between visual observation and visibility. Both of the observations showed that the highest visibility occurred in the afternoon. The relationship of water vapor contents and mass concentration of particulate respectively with visibility were both negative. However, it is meaningful that the negative correlation of visual observation visibility and water vapor contents, along with the instrumental observation visibility and mass concentration of particulate appeared more significantly.