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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (1): 77-87.DOI: 10.7522/j.issn.1000-694X.2019.00048

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Influence of desertification control in Hobq Desert on air quality in Beijing-Tianjin-Hebei region: a simulation case of dust weather on 3-6, May, 2017

Wei Wei1,2, Zhang Wending2, Chen Huansheng1,2, Ren Yuanzhe3, Pi Dongqin2, Wu Jianbin1,2, Chen Tingting2, Xiao Linhong2, Luo Baogang2, Yan Pingzhong1,2   

  1. 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
    2. 3 Clear Technology Co. Ltd., Beijing 100029, China;
    3. Environmental Monitoring Central Station of Inner Mongolia, Hohhot 010010, China
  • Received:2019-01-25 Revised:2019-04-16 Online:2020-01-20 Published:2020-01-18

Abstract: Hobq Desert, as one of the sand-dust transport and source areas that affect the Beijing-Tianjin-Hebei region, is a successful case of turning desert into treasure and benefit by using a series of scientific and technological means. It is also a global representative example of desertification control. In order to study the effect of Hobq Desert treatment on the improvement of air quality in Beijing-Tianjin-Hebei region, data of manual sampling and urban air quality monitoring and air mass trajectory model were used to screen out dust weather cases, which all happened in Hobq Desert and affected the Beijing-Tianjin-Hebei region. The Nested Air Quality Prediction Modeling System (NAQPMS) was used to simulate sanding and governance of the desert by designing different sensitivity tests of sand-weighting coefficient during a representative case of dust process occurred on May 3-6, 2017. The results showed that:(1) The meteorological model can better grasp the evolution of the weather system and the characteristics of the surface wind field, and ensure that the NAQPMS model can reasonably simulate the sand-sanding area, the extent of impact and the characteristics of temporal-spatial evolution; (2) The simulated values and changes of PM10 concentrations in the cities which are affected by sand and dust are consistent with the observations, indicating that the model reasonably reproduces the dust transport process; (3) The contributions of PM10 mass concentrations on Beijing-Tianjin-Hebei region by sanding in Hobq Desert reached 35-150 μg·m-3 and the contribution ratios were from 10% to 40%; (4) The treatment of Hobq Desert can reduce PM10 concentrations of the cities in the Beijing-Tianjin-Hebei region by 35-75 μg·m-3, and the decrease ratios were between 5% and 20%. The PM10 concentrations of decreased by 7%-37% in the cities, and desert treatment can effectively reduce the concentrations of PM10 in the affected areas.

Key words: Hobq Desert, desertification control, NAQPMS, Beijing-Tianjin-Hebei region, air quality

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