Modeling Urban Precipitation Modification by Spatially Heterogeneous Aerosols
Modeling Urban Precipitation Modification by Spatially Heterogeneous Aerosols
复制标题
空间异质气溶胶对城市降水的影响建模
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
D. Niyogi
中科院分区：
文献类型：
--
作者：
P. Schmid;D. Niyogi
摘要本研究介绍了一种在数值天气模型中模拟空间异质城市气溶胶如何改变降水雷暴的方法。空气质量模型（简单光化学模型）与高分辨率中尺度天气模型（区域大气建模系统）相结合，生成与先前实地研究中测量的结果一致的可变城市云凝结核值。耦合发射模型用于使用真实大气理想化地表 (RAIL) 方法来模拟具有嵌入式雷暴的天气低压系统在理想化城市上空的通过。进行实验来校准城市环境中云成核气溶胶的表面形成，然后评估不同气溶胶负荷对模拟降水的具体响应。模型对气溶胶不均匀性的响应减少了总降水量，但显着增加了模拟降雨率。高气溶胶负荷场景产生...
AbstractThis study introduces a methodology to simulate how spatially heterogeneous urban aerosols modify a precipitating thunderstorm in a numerical weather model. An air quality model (simple photochemical model) was coupled with a high-resolution mesoscale weather model (the Regional Atmospheric Modeling System) and generated variable urban cloud condensation nuclei values consistent with those measured in previous field studies. The coupled emission model was used to simulate the passage of a synoptic low pressure system with embedded thunderstorms over an idealized city using the real-atmosphere idealized land surface (RAIL) method. Experiments were conducted to calibrate the surface formation of cloud-nucleating aerosols in an urban environment and then to assess the specific response of different aerosol loads on simulated precipitation. The model response to aerosol heterogeneity reduced the total precipitation but significantly increased simulated rain rates. High-aerosol-loading scenarios produc...