Multisensor and Multimodel Monitoring and Investigation of a Wintertime Air Pollution Event Ahead of a Cold Front Over Eastern China

Abstract

Serving as a numerical laboratory and integrating our knowledge on how physical and chemical processes affect pollutant concentrations, the grid-based Eulerian models are widely used to investigate air pollution (Russell, 1997); however, the uncertainties within the model simulations cannot be overlooked. Given model errors/uncertainties associated with both meteorological and chemical processes/inputs, substantial uncertainties of a single deterministic simulation with one air quality model are always of concern when examining impact of emission abatement (Leibensperger et al., 2011), climate change effects (

Influence of Multi-Scale Meteorological Processes on PM2.5 Pollution in Wuhan, Central China

“…For example, during a pollution episode in November 2017, large amounts of aerosols were transported to Wuhan from North China along with the movement of cold air masses (Xiao et al, 2020). Similar processes have also been reported by Hu et al (2021) and Lu et al (2019). In addition to these trans-boundary transport processes, the local-scale planetary boundary layer (PBL) also plays a critical role in the formation of PM 2.5 pollution (Liu et al, 2018;Mbululo et al, 2019;Xiao et al, 2020).…”

Regulation of Synoptic Circulation in Regional PM2.5 Transport for Heavy Air Pollution: Study of 5‐year Observation Over Central China

“…We used the Multi‐resolution Emission Inventory for China developed by Tsinghua University (MEIC; http://www.meicmodel.org/ 2021) in this study. The MEIC inventory provides monthly data of air pollutant emissions from more than 700 anthropogenic sources of 5 departments (Agriculture, Industry, Power, Residential, and Transportation) in mainland China (Li et al., 2017; Zheng et al., 2018), which is adopted in the FLEXPART‐WRF simulations considering less impact of air pollutant emissions on haze pollution in China comparing with meteorological influences (Gao, Shan, et al., 2020; He et al., 2020; X. Hu, Zhao, et al., 2021).…”

“…The THB is a region with heavy air pollution featured by high PM 2.5 levels over central China, especially during the season of East Asian winter monsoon (Shen et al., 2020; Zhu et al., 2021). Due to the East Asian winter monsoons' prevailing winds, regional transport of PM 2.5 plays a dominant part in a heavy air pollution period in central China with transport contribution of 70.5% (Hu, Zhao, et al., 2021). Although the dominant synoptic patterns were classified for heavy pollution of PM 2.5 in the region of THB over central China from 2013 to 2018 (Yan et al., 2020), few studies have analyzed the modulation of synoptic circulation on regional PM 2.5 transport for heavy PM 2.5 pollution in central China in detail, given that the THB is a key receptor region in regional air pollutant transport over CEC owing to its special geographical position with a typical East Asian winter monsoon climate (Yu et al., 2020).…”

Climatological Characteristics of Cold Fronts and Their Impacts on Air Quality in Cold Seasons Over the Eastern China

“…At the same time, precipitations associated with cold-front passages have been considered an effective removal of PM 2.5 in the atmosphere (W. Y. X.-M. Hu et al, 2021;Zheng et al, 2019). As shown in Figure 9, cold fronts passing BTH in autumn and those passing YRD in winter are accompanied by stronger rainfall.…”

“…The most polluted areas over eastern China are largely overlapped with the active region of the synoptic fronts (He et al, 2018;W. Y. Hu et al, 2021;X.-M. Hu et al, 2021;Huang et al, 2020;Kang et al, 2019;Leung et al, 2018;W. H. Zhang et al, 2022;Zhou et al, 2018).…”