摘要
利用耦合了AFWA和Shao04起沙参数化方案的WRF-Chem模式结合Nudging方法,对2020年4月9~11日发生在我国西北地区的一次沙尘天气过程进行模拟,结合地面及卫星观测数据,对模式模拟沙尘的能力进行了初步验证,分析了不同起沙方案及其结合Nudging方法后对模式模拟结果的影响。结果表明,2种起沙方案均有能力再现此次沙尘天气过程,开启Nudging后2种方案模拟出的沙尘分布结果都有所改进。对于地面沙尘模拟,在沙尘源区不开Nudging的模式模拟结果更接近观测,在沙尘影响区开启Nudging后的模拟结果更优。整体而言,结合了Nudging方法的Shao04起沙方案对我国西北地区的沙尘过程具有更好的模拟能力。Nudging方法对模式模拟风场的能力改进较为明显,从而提高了模式对沙尘的模拟能力。
Combination of WRF-Chem Model coupled with the AFWA and Shao04 dust-emission schemes and Nudging method are employed to simulate a dust process in northwest China during April 9 to 11,2020.The model to simulate the dust process has been preliminarily evaluated,and impacts of different dust-emission schemes and the improved mode with Nudging method on its simulation results have been analyzed by using the ground and satellite observation data.The results show the two dust-emission schemes are capable of reproducing the observed dust plume.The simulated dust plume of the two schemes has been improved with Nudging method.For the ground dust simulation,the results of the model without Nudging in the dust source area are most closely agreement with the observation,and the model simulation results in the impact area of dust performed a better simultaion with Nudging.Generally,the Shao04 dust-emission scheme combined with the Nudging can well simulate the dust process in the northwest of China.The Nudging method significantly improves the ability to simulate wind fields,thus enhancing the simulation ability.
作者
王金艳
王之屹
苏士翔
陈敏
张鑫
陈金车
孙彩霞
谢祥珊
李旭
WANG Jinyan;WANG Zhiyi;SU Shixiang;CHEN Min;ZHANG Xin;CHEN Jinche;SUN Caixia;XIE Xiangshan;LI Xu(Key Laboratory of Climate Resource Development and Disaster Prevention in Gansu Province,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;Gansu Meterological Information and Technology Support Cente,Lanzhou 730020,China;Pingliang Meteorological Bureau of Gansu Province,Pingliang 744000,China)
出处
《环境保护科学》
CAS
2022年第4期59-67,共9页
Environmental Protection Science
基金
国家重点研发计划项目(2020YFA0608402)
甘肃省自然科学基金(21JR7RA501,21JR7RA497)。
