杭州湾近海大气污染物扩散特征的研究  

Study on the dispersion characteristics of offshore atmospheric pollutants near Hangzhou Bay

作　　者：印若斐 徐佳佳 钟珂[1] 亢燕铭[1] Yin Ruofei;Xu Jiajia;Zhong ke;Kang Yanming

机构地区：[1]东华大学环境科学与工程学院

出　　处：《洁净与空调技术》2024年第1期1-5,共5页Contamination Control & Air-Conditioning Technology

基　　金：国家自然科学基金项目(42075179)。

摘　　要：通过数值模拟方法研究了杭州湾从浙江宁波到嘉兴形成的湾区海陆风及其对大气污染物的输运效果与宁波污染情况。结果表明:海风与陆风分别会在杭州湾海域中央上空形成辐散线与辐合线。大气污染物的扩散效果和浓度分布取决于污染物释放时期。陆风期释放的污染物对离海0-20km内的陆地区域影响最大,且会在次日早晨再次吹回陆地形成二次污染。海风期释放的污染物对离海20km-60km内陆地区域的影响较离海0-20km内的更大。同时大部分情况下,陆地上空200m高度内的污染浓度均随高度的减小而增大。The sea and land breezes in Hangzhou Bay from Ningbo,Zhejiang to Jiaxing and their effects on the transport of atmospheric pollutants and pollution in Ningbo were studied by numerical simulation methods.The results show that the sea breeze and land breeze will form dispersion lines and convergence lines respectively over the central part of Hangzhou Bay sea.The dispersion effect and concentration distribution of atmospheric pollutants depend on the period when pollutants are released.The pollutants released during the land breeze period have the greatest impact on the land area within 0-20 km from the sea,and will blow back to the land again in the next morning to form secondary pollution.The pollutants released during the sea breeze period have a greater impact on the land area within 20-60 km from the sea than that within 0-20 km from the sea.Meanwhile,in most cases,the pollution concentration within the elevation of 200 meters will increase with the decrease of height.

关 键 词：湾区海陆风 大气污染物 空气质量 数值模拟 

分 类 号：X51[环境科学与工程—环境工程]