项目名称: 华南沿海与内陆城市酸雨形成机理的对比研究
项目编号: No.41275100
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 樊琦
作者单位: 中山大学
项目金额: 86万元
中文摘要: 近年来,华南地区的污染物排放已得到一定的控制,但酸雨频率和酸度没有因此降低,部分地区甚至有所加重,因此在当前的产业结构及气候状况下开展该地区的酸雨研究是有必要的。利用收集的1998-2008年广东省逐场酸雨资料,结合项目将开展的酸雨加强观测试验资料分不同类型的降雨过程(主要包括对流雨、锋面雨和台风雨),进行以下的主要研究:(1)对比分析华南沿海与内陆地区降雨中离子成分的特征;(2)利用高时空分辨率的WRF(MM5)/SMOKE/CMAQ模式系统模拟分析不同降雨过程成云以及致酸前体物SO2,NOx的三维分布特征,探讨云内清除和云下冲刷两个过程对酸雨的影响;(3)根据模式结果探讨不同地区酸性物质的来源,通过敏感性试验定量局地以及非局地污染物的贡献;(4)探讨海盐气溶胶对沿海地区酸雨的影响,揭示氯化学反应过程对沿海地区大气环境问题的重要性。上述研究可为该区域酸雨调控对策提供一定程度的理论指导。
中文关键词: 酸雨;WRF/CMAQ模式;海盐气溶胶;氯化学;
英文摘要: In recent years, the emissions in Southern China have been controlled in some extent, but the frequency and acidity of precipitation didn't decrease, it even getting more worse in some areas. It is necessary to take deeper insight into the acid rain in Southern China under current economic structure and climate condition. According to the measurements in Guangdong province from 1998-2008, combined with the observations from addiational field experiments by this project, the acid rain will be divided by the precipitation type,including the convective precipitaion,front precipitaion and typhoon precipitation. Four researches will be conducted:(1) The charactersitics of various ions will be compared between the inland and the coastal cities in Southern China.(2)The three dimentional distribution features of clouds and the precursor SO2, NOx will be analyzed by WRF(MM5)/SMOKE/CMAQ model with high resolution.The effects on the wet depostion substances of the rain out process and the wash out process will by discussed.(3)The sources of the acid substances over different regions will be analyzed and the contributions from local emissions and non-local emissions will be calculated through sensitivity numerical experiments.(4)The influence of sea salt aerosols on the aicd rain and the importance of cl chemical reaction p
英文关键词: acid rain;WRF/CMAQ model;sea salt aerosol;Cl chemistry;