Research on Effect of Precipitation on Atmospheric Extinction Coefficient & Visibility
The variation of visibility is mainly influenced by the scattering and absorption of atmospheric particles at visible wavelengths. The principle of visibility sensors are based on the relationship between visibility and atmospheric extinction coefficient, which is integrated by scattering coefficient of atmospheric particles within a volume. The effect of aerosol, dust particles and smoke are taken into account in the traditional visibility analysis;however, as one important factor affecting visibility, precipitation particles are usually neglected. For understanding the relation between visibility variation and precipitation, the physical characteristics of precipitation are analyzed and the influence of various kinds of precipitation particles on atmospheric extinction coefficient and visibility are discussed. The relationships of rainfall and snowfall with visibility are obtained by numerical simulation, which are validated by observation data of precipitation and visibility.
Precipitation Extinction Coefficient Visibility
Liu Xichuan Gao Taichang Liu Lei Zhang Wei Yang Shuchen
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China No.91876 A
国际会议
南京
英文
97-102
2010-05-08（万方平台首次上网日期，不代表论文的发表时间）