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Article Dans Une Revue Atmospheric Environment Année : 2019

Influence of anthropogenic emission inventories on simulations of air quality in China during winter and summer 2010

Résumé

We applied the regional chemistry-transport model WRF-Chem to investigate the air pollution characteristics in three Chinese city clusters (Beijing, Shanghai and Guangzhou) and assess the model performance in wintertime (January 2010) and summertime (July 2010) conditions. Three simulations utilizing the HTAPv2, REASv2 and MACCity anthropogenic emission inventories were conducted and compared with satellite and ground-based measurements to assess the sensitivity of the model predictions to anthropogenic emissions. Model-predicted surface meteorological fields are overall in good agreement with surface observations, although the model tends to overestimate the maximum values of surface wind speed as reported also in previous WRF-Chem modelling studies. Large discrepancies between the three emission inventories were found, specifically in the spatial distribution and the magnitude of the emissions (e.g. over 98%, 86% and 85% differences in some regions for carbon monoxide (CO), nitrogen oxide (NO) and organic carbon (OC) emissions respectively). As a result, we found large differences between the simulations and several discrepancies when compared to satellite and surface observations. The HTAPv2-and REASv2-based simulations better reproduce the magnitude and spatial features of CO total columns and NO2 tropospheric columns derived from MOPITTv6 and GOME2 satellite observations respectively. The three model simulations satisfactorily reproduce the air pollution characteristics in January 2010 as observed at surface monitoring stations in Beijing and Shanghai, and meet the air quality model performance goals for particulates. The HTAPv2-based simulation better captures the pollution episode that occurred in Beijing in mid-January 2010, which is found to be related to a combination of different meteorological factors that led to the build-up of pollution. The high photochemical activity and convective turbulence in July 2010, in addition to differences in the emissions used, led to more pronounced differences between the three simulations and lower statistical skills in particular for trace gases. This study shows that a considerable part of uncertainties in current air quality model predictions for China can be attributed to uncertainties in
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Dates et versions

hal-02116043 , version 1 (10-11-2020)

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Idir Bouarar, Guy Brasseur, Katinka Petersen, Claire Granier, Lili Wang, et al.. Influence of anthropogenic emission inventories on simulations of air quality in China during winter and summer 2010. Atmospheric Environment, 2019, 198, pp.236-256. ⟨10.1016/j.atmosenv.2018.10.043⟩. ⟨hal-02116043⟩
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