研究论文
刘奇俊,胡志晋,丁国安,苏维瀚.层状云清除气溶胶的数值模拟[J].环境科学学报,1992,12(3):288-296
层状云清除气溶胶的数值模拟
- NUMERICAL SIMULATION ON THE AEROSOL SCAVENGING OF STRATIFORM CLOUDS
- 基金项目：
- 作者
- 单位
- 刘奇俊
- 国家气象局气象科学研究院，北京 100081
- 胡志晋
- 国家气象局气象科学研究院，北京 100081
- 丁国安
- 国家气象局气象科学研究院，北京 100081
- 苏维瀚
- 中国科学院生态环境研究中心，北京 100085
- 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.
- Abstract：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.
- Key words：aerosol scavenging rainout washout wet deposition
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