10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Spatial and Temporal Characteristics of Taklimakan Desert Dust and Its Air Quality Influence Using the WRF/CMAQ Model System
WENYE DENG, Jiaerheng Ahati, Xue Qiao, Xinjie Yuan, Kui Deng, Jing He, Weiyan Lin, Jing Yang, Jie Zhu, Weixin Du, Hongliang Zhang, Xinjiang Academy of Environmental Protection Science
Abstract Number: 101 Working Group: Aerosol Transport and Transformation
Abstract Taklimakan Desert is surrounded with Tianshan, Kunlun and Altun Mountains, most of the desert dust is deposited in the Tarim Basin, and has serious impact on the air quality of near regions. In recent years, the ambient particulate matter (PM) concentrations in the cities in the Tarim Basin are exceeding the Ambient air quality standards of China, especially Hotan and Kashgar. . In this paper, the spatial and temporal distribution, production and deposition, and regional transport of desert dust aerosol over Tarim Basin in 2015 were quantified using the Weather Research and Forecasting model with the Community Multiscale Air Quality (WRF-CMAQ) model system. Combined with observation data, the simulation results show that the dust production was largest in spring, relatively small in summer and autumn, and reached its minimum value in winter, the highest annual dust deposition and ambient PM10 and PM2.5 concentration were appeared in Hotan and Kashgar. It is suggested that the spatial distribution and temporal variation in dust deposition and ambient PM10 and PM2.5 are closely related to the different underlying surfaces characteristics and meteorological conditions, wind speed, wind direction and precipitation. This is the first time that the WRF-CMAQ model system was used in the Tarim Basin with Taklimakan Desert dust emission, and the results are publicly available for future of the ecological environment protection and human health studies.