摘要
建立了一个一维层状云系的气溶胶清除模式,模式旨在模拟云发展过程中云、雨水中气溶胶浓度的时空演变规律,研究气溶胶粒子的云内清除和云下清除的相对贡献大小及其湿沉降速率等.模拟结果在一定程度上与实测结果相符.
A one-dimensional time-dependent aerosol scavenging model of stratiform clouds is formulated in term of continuity equations for aerosol particles in the air and in the cloud droplets or raindrops in-cloud as well as below-cloud. The model is used to investigate (i) the temporal and spatial evolution of cloudwa-ter aerosol concentration and rainwater aerosol concentration, (ii) the relative importance of the rainout and washout of aerosol particles and the wet deposition velocity. In order to evaluate the effects of nucleation scavenging, two sensitivity tests with and without nucleation were run. The modelling results indicate that the nucleation scavenging is the most efficient in-cloud aerosol scavenging process. The calculated results from the model are in general in accord with observations.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1992年第3期288-296,共9页
Acta Scientiae Circumstantiae
关键词
气溶胶
清除
云内雨洗
湿沉降速率
aerosol, scavenging, rainout washout, wet deposition.
