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Sensitivities of ozone to its precursors during heavy ozone pollution events in the Yangtze River Delta using the adjoint method.
Sci Total Environ
May 2024
Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA.
Although the concentrations of five basic ambient air pollutants in the Yangtze River Delta (YRD) have been reduced since the implementation of the "Air Pollution Prevention and Control Action Plan" in 2013, the ozone concentrations still increase. In order to explore the causes of ozone pollution in YRD, we use the GEOS-Chem and its adjoint model to study the sensitivities of ozone to its precursor emissions from different source regions and emission sectors during heavy ozone pollution events under typical circulation patterns. The Multi-resolution Emission Inventory for China (MEIC) of Tsinghua University and 0.
View Article and Find Full Text PDFEvaluation of MERRA-2 and CAMS reanalysis for black carbon aerosol in China.
Environ Pollut
February 2024
State Key Laboratory of Severe Weather & Institute of Artificial Intelligence for Meteorology, Chinese Academy of Meteorological Sciences, Beijing, 100081, China.
Black carbon (BC) constitutes a pivotal component of atmospheric aerosols, significantly impacting regional and global radiation balance, climate, and human health. In this study, we evaluated BC data in two prominent atmospheric composition reanalysis datasets: the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) and the Copernicus Atmosphere Monitoring Service (CAMS), and analyzed the causes of their deviations. This assessment is based on observational data collected from 34 monitoring stations across China from 2006 to 2022.
View Article and Find Full Text PDF[Establishment of High-Resolution Emissions Inventory in Wuhai and Its Application in Exploring the Causes of Ozone Pollution].
Huan Jing Ke Xue
October 2022
Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
Wuhai is a typical coking industrial base including three industrial parks within its jurisdiction. The emission amount of air pollutants is considerable here, and O pollution has become serious in recent years. Clarifying the air pollutant emission characteristics and exploring the formation mechanism of O are the basis for objectively understanding the O pollution and formulating scientific prevention and control measures.
View Article and Find Full Text PDFCharacterization of Regional Combustion Efficiency using ΔXCO: ΔXCO Observed by a Portable Fourier-Transform Spectrometer at an Urban Site in Beijing.
Adv Atmos Sci
May 2022
Carbon Neutrality Research Center, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, 100029 China.
Measurements of column-averaged dry-air mole fractions of carbon dioxide and carbon monoxide, CO (XCO) and CO (XCO), were performed throughout 2019 at an urban site in Beijing using a compact Fourier Transform Spectrometer (FTS) EM27/SUN. This data set is used to assess the characteristics of combustion-related CO emissions of urban Beijing by analyzing the correlated daily anomalies of XCO and XCO (e.g.
View Article and Find Full Text PDFEvaluation of a highly condensed SAPRC chemical mechanism and two emission inventories for ozone source apportionment and emission control strategy assessments in China.
Sci Total Environ
March 2022
Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77843-3136, USA. Electronic address:
The response of summertime O to changes in the nitrogen oxides (NO) and volatile organic compounds (VOC) emissions, and contributions of different NO and VOC sources to O in China are studied using a highly condensed photochemical mechanism in the Statewide Air Pollution Research Center (SAPRC) family (CS07A) and two popular anthropogenic emission inventories, the Multi-resolution Emission Inventory for China (MEIC) and Regional Emission inventory in ASia (REAS). Although CS07A predicts slightly lower O concentrations than the standard fix-parameter version of the SAPRC-11 mechanism, the two mechanisms predict almost identical relative responses to daily maximum 8-hour O (O-8h) due to NO and VOC emission reductions. A source-oriented version of the CS07A is applied to determine source contributions of NO and VOCs to O using MEIC and REAS.
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