起沙方案对西北地区沙尘过程模拟的影响  

Impact of Dust Emission Schemes on the Simulation of Dust Storms in the Northwest Region

作　　者：刘筱冉 王金艳[1,2] 邱继勇 李全喜 魏林波[1] Liu Xiaoran;Wang Jinyan;Qiu Jiyong;Li Quanxi;Wei Linbo(College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;Key Laboratory of Semi-arid Climate Changes of the Ministry of Education,Lanzhou University,Lanzhou 730000,China;95871 Troops of PLA,Hengyang 421000,China)

机构地区：[1]兰州大学大气科学学院 [2]兰州大学半干旱气候变化教育部重点实验室 [3]中国人民解放军95871部队

出　　处：《环境保护科学》2018年第4期69-76,共8页Environmental Protection Science

基　　金：国家自然科学基金项目(41575138;41505083);兰州大学中央高校基本科研业务费专项资金(lzujbky-2017-68 lzujbky-2017-61);干旱气象科学研究基金项目(IAM201503)共同资助

摘　　要：研究利用耦合了GOCART、AFWA、Shao01、Shao04和Shao11 5种起沙参数化方案的WRF-Chem模式对发生在西北地区的强沙尘过程进行了模拟,找出了对西北地区沙尘过程模拟更为合理的起沙方案。研究发现,WRF-Chem模式模拟结果较好地再现了气象场的演变特征,耦合了5种不同方案的模式均较合理地模拟出沙尘浓度的时空演变特征、主要的起沙区域和沙尘传输过程。但Shao01、Shao04和Shao11 3种方案下模拟的沙尘分布和起沙过程较符合实际情况。沙尘源地附近和下游兰州市PM_(10)和PM_(2.5)质量浓度时间变化特征的模拟与观测结果也十分接近,Shao1 1方案对PM_(10)和PM_(2.5)质量浓度的模拟结果要优于GOCART、AFWA、Shao01和Shao04 4种方案,说明Shao1 1方案对发生在西北地区的沙尘过程具有更好的模拟能力。Dust events over the northwest region was simulated by use of WRF-Chem model coupled with such five different dust emission schemes as GOCART,AFWA,Shao01,Shao04 and Shao11 schemes to find out which scheme was most suitable to simulate dust event in the northwest region.The study results showed that the evolution of meteorological filed was well reproduced.The coupled five dust emission schemes all rationally simulated out the temporal-spatial evolution features of dust concentration,the main observed dust emission regions,and the dust transformation process.Dust distribution and dust emission procedure simulated by Shao 01,Shao04 and Shao11 schemes complied with the fact.Simulation of the temporal variation of PM10and PM2.5concentration near the dust source and in its downstream region of Lanzhou agreed closely with the observation results.Shao04 scheme performed better than the GOCART,AFWA,Shao01 and Shao04 schemes in simulation of the PM10and PM2.5concentration,indicating that it had a better performance in simulating the dust event over the northwest region.

关 键 词：起沙参数化方案 强沙尘天气 WRF-Chem模式 数值模拟 

分 类 号：X513[环境科学与工程—环境工程]