摘要
利用春冬两季分别架设在兰州市与兰州市郊皋兰山的CE318型太阳光度计资料分析山谷内与山顶的气溶胶光学厚度(AOD)差别,研究兰州市特殊地形影响下的AOD变化情况、以及气溶胶粒子的主要类型.市区AOD日变化可分为市区峰型和平稳型,山上为峰型和谷型.AOD平均日变化在市区与山上是冬季大于春季,市区大于山上.市区上空的大部分气溶胶集中在600 m以下的高度层中,春季这一气层的气溶胶对总AOD的贡献率为48%,冬季为60%,冬季大于春季.山上气溶胶平均粒径冬季小于春季,冬季气溶胶粒子以细粒子为主,春季气溶胶粒子以粗粒子为主.
Two CE318 sun photometers were used in Lanzhou City proper and near Gaolan Mountain to observe the aerosol optical depth in winter and spring and to study the variations in aerosol optical depth and its pattern. There were two spectra of aerosol diameter existing over Lanzhou City, namely one peak pattern and one stable pattern, but over the mountain there were chiefly two different patterns, i.e. valley and peak patterns. As for the seasonal average, there was not much difference of aerosol optical depth between the two seasons over Gaolan Mountain. In Lanzhou City, the optical depth was much larger in winter than in spring, mainly due to the heating from coal. The contributions of aerosol near the surface layer to the total optical depth were about 48%in spring and 60%in winter.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第4期470-473,482,共5页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(41175042)
关键词
气溶胶光学厚度
春季
冬季
皋兰山
兰州
aerosol optical depth
spring
winter
Gaolan Mountain
Lanzhou City
