The Influence Of Snow Cover On Environmental Light And Climate In Northeast China

Illumination climate mainly refers to the natural condition of outdoor natural light,which is the general term affecting the changes or changes of natural light,expressed by the illumination value.More than 80% of human information about external information comes from vision,and high intensity illumination has an obvious impact on human health and behavior.Snow has high reflectivity,with the longest six months in seasonal snow cover for 6 months,and the northeast region is mainly direct solar light.Therefore,it is important to study the impact of snow on high latitude light climate,and there are few relevant studies.This paper adopts the field of comparative observation and artificial climate box control experiment,using analysis of variance and model fitting,analyzes the influence of snow on the day and night illumination,and analyzed the different depth,different density,different black carbon pollution under different light conditions on the influence of attention,the conclusion is as follows:1.Daytime illumination was significantly different between people with and without snow.Compared with those with snow and those without snow,those with snow significantly improved the daytime environmental illumination,with significant differences.The average daily illumination of ground with snow is 15424.714 Lux,and the daily illumination of ground without snow is 2713.655 Lux.The daily illumination of ground with snow is 5.684 times that of ground without snow,an increase of12711.059 Lux.During the whole day,the illumination of the ground with snow is higher than that of the ground without snow.The effect of snow cover on the attention degree shows a secondary parabolic curve.A rate of 48.922 Lux / degree.2.Without snow,snow increases the illumination at night.The night illumination(22:00 to 4:00)is 0.010,00 L u x and 0.005 Lux respectively,and the night illumination with or without snow is 0.213 Lux and 0.010 Lux,respectively.Under the moonlight condition,the night illumination with or without snow is significantly different.In moonlight,snow increased by 0.203 Lux,and by 0.005 Lux.From 22:00 to 4:00 at night,at each time node,but there is no obvious regularity with the time node.3.Different snow depth has an impact on illumination,and the same background light intensity and different snow depth have significantly different effects on environmental illumination.With the increase of snow depth,the impact on illumination increases,and under the background of different illumination,the increase rate increases with the increase of snow depth.In the 100 w,200w,300 w,400w,500 w care background,the light increased linearly with 6.534 Lux / cm,7.769 Lux / cm,11.697 Lux / cm,17.726 Lux / cm,18.070 Lux / cm,respectively.4.The content of BC pollutants in the snow has an impact on the illumination.For the same background light intensity,different B...