ACP - Special issue
Regional nitrogen oxides emission trends in East Asia observed from space
Atmos. Chem. Phys., 13, 12003-12012, 2013
Retrieving tropospheric nitrogen dioxide from the Ozone Monitoring Instrument: effects of aerosols, surface reflectance anisotropy, and vertical profile of nitrogen dioxide
Atmos. Chem. Phys., 14, 1441-1461, 2014
The 2013 severe haze over southern Hebei, China: model evaluation, source apportionment, and policy implications
Atmos. Chem. Phys., 14, 3151-3173, 2014
Isoprene emissions over Asia 1979–2012: impact of climate and land-use changes
Atmos. Chem. Phys., 14, 4587-4605, 2014
Mapping Asian anthropogenic emissions of non-methane volatile organic compounds to multiple chemical mechanisms
Atmos. Chem. Phys., 14, 5617-5638, 2014
A temporally and spatially resolved validation of emission inventories by measurements of ambient volatile organic compounds in Beijing, China
Atmos. Chem. Phys., 14, 5871-5891, 2014
High-resolution mapping of vehicle emissions in China in 2008
Atmos. Chem. Phys., 14, 9787-9805, 2014
Trends of non-methane hydrocarbons (NMHC) emissions in Beijing during 2002–2013
Atmos. Chem. Phys., 15, 1489-1502, 2015
A comparison study between CMAQ-simulated and OMI-retrieved NO2 columns over East Asia for evaluation of NOx emission fluxes of INTEX-B, CAPSS, and REAS inventories
Atmos. Chem. Phys., 15, 1913-1938, 2015
Characterization of road freight transportation and its impact on the national emission inventory in China
Atmos. Chem. Phys., 15, 2105-2118, 2015
Chemical and stable carbon isotopic composition of PM2.5 from on-road vehicle emissions in the PRD region and implications for vehicle emission control policy
Atmos. Chem. Phys., 15, 3097-3108, 2015
Evaluating the effects of China's pollution controls on inter-annual trends and uncertainties of atmospheric mercury emissions
Summary: China’s atmospheric Hg emissions of anthropogenic origin have been effectively restrained through the national policy of air pollution control. Expansion of technologies with high energy efficiencies and air pollutant removal rates leads to a much slower growth of Hg emissions than that of energy and economy. However, increased uncertainties of Hg emissions are quantified from 2005 to 2012, attributed to the unclear operation status or small sample size of field tests on those technologies.
Atmos. Chem. Phys., 15, 4317-4337, 2015
Regional differences in Chinese SO2 emission control efficiency and policy implications
Summary: SO2 emission reduction over North China is most effective in reducing national mean surface sulfate concentrations and sulfur export fluxes (β = 0.76 and 0.95, respectively), while reduction over South China has the highest β in reducing population-weighted sulfate concentration (β = 0.98). We recommend that China needs to carefully design a regionally specific implementation plan of realizing its SO2 emissions reduction target to maximize the resulting air quality benefits.
Atmos. Chem. Phys., 15, 6521-6533, 2015
Estimating NH3 emissions from agricultural fertilizer application in China using the bi-directional CMAQ model coupled to an agro-ecosystem model
Summary: In this study, we estimate, for the first time, the NH3 emission from the agricultural fertilizer application in China online using the bi-directional CMAQ model coupled to an agro-ecosystem model. Compared with previous researches, this method considers more influencing factors, such as meteorological fields, soil and the fertilizer application, and provides improved NH3 emission with higher spatial and temporal resolution.
Atmos. Chem. Phys., 15, 6637-6649, 2015
NOx emission estimates during the 2014 Youth Olympic Games in Nanjing
Summary: We derived the NOx emissions from the OMI satellite observations. We find a NOx emission reduction of at least 25% during the Youth Olympic Games in Nanjing in 2014. The emission estimate algorithm has detected an emission reduction of 10% during the Chinese Spring Festival. This paper also shows that the observed concentrations and the derived emissions from space have different patterns that provide complimentary information.
Atmos. Chem. Phys., 15, 9399-9412, 2015
Quantitative assessment of atmospheric emissions of toxic heavy metals from anthropogenic sources in China: historical trend, spatial distribution, uncertainties, and control policies
Summary: For the first time, with S-shaped curves, the best available representation of time-varying emission factors of 12 heavy metals (Hg, As, Se, Pb, Cd, Cr, Ni, Sb, Mn, Co, Cu and Zn) from primary anthropogenic sources of China are determined on account of economic transitions and pollution control technology improvement. The temporal and spatial variation characteristics of these heavy metals emissions during the period of 1949−2012 are calculated and evaluated with uncertainty analysis.
Atmos. Chem. Phys., 15, 10127-10147, 2015
Constraining black carbon aerosol over Asia using OMI aerosol absorption optical depth and the adjoint of GEOS-Chem
Summary: We attempt to reduce uncertainties in BC emissions and improve BC model simulations by developing top-down, spatially resolved, estimates of BC emissions through assimilation of OMI observations of aerosol absorption optical depth (AAOD) with the GEOS-Chem model and its adjoint for April and October of 2006. Despite the limitations and uncertainties, using OMI AAOD to constrain BC sources we are able to improve model representation of BC distributions, particularly over China.
Atmos. Chem. Phys., 15, 10281-10308, 2015
Influence of aerosols and surface reflectance on satellite NO2 retrieval: seasonal and spatial characteristics and implications for NOx emission constraints
Summary: We conduct an improved OMI-based retrieval of tropospheric NO2 VCDs (POMINO) over China by explicitly accounting for aerosol optical effects and surface reflectance anisotropy. Compared to the traditional implicit aerosol treatment, an explicit treatment greatly lowers NO2 VCDs and subsequently estimated NOx emissions over eastern China, but with large spatiotemporal dependence. An explicit treatment also better captures high-pollution days. Effects of surface reflectance treatments are smaller.
Atmos. Chem. Phys., 15, 11217-11241, 2015
Advantages of a city-scale emission inventory for urban air quality research and policy: the case of Nanjing, a typical industrial city in the Yangtze River Delta, China
Summary: A high-resolution emission inventory of air pollutants and CO2 for Nanjing, a typical city in eastern China, is developed, incorporating the best available local information from on-site surveys. The temporal and spatial distribution of the emissions and the correlation between specific species of the inventory are assessed by comparisons with observations and other inventories at larger spatial scale. The emission inventory provides a basis to consider the quality of instrumental observations.
Atmos. Chem. Phys., 15, 12623-12644, 2015