Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 40 checked references that resolve
resolves10.1002/2014JD021641Investigation of the sources and evolution processes of severe haze pollution in Beijing in January 2013
resolves10.5194/acp-15-13681-2015Aerosol composition, oxidation properties, and sources in Beijing: results from the 2014 Asia-Pacific Economic Cooperation summit study
resolves10.5194/acp-15-8165-2015Characteristics and formation mechanism of continuous hazes in China: a case study during the autumn of 2014 in the North China Plain
resolves10.5194/acp-13-5685-2013Analysis of a winter regional haze event and its formation mechanism in the North China Plain
resolves10.5194/acp-16-3207-2016New insights into PM
<sub>2.5</sub>
chemical composition and sources in two major cities in China during extreme haze events using aerosol mass spectrometry
resolves10.1073/pnas.1300018110Evidence on the impact of sustained exposure to air pollution on life expectancy from China’s Huai River policy
resolves10.1007/s11430-013-4773-4Mechanism for the formation of the January 2013 heavy haze pollution episode over central and eastern China
resolves10.5194/acp-15-2969-2015Exploring the severe winter haze in Beijing: the impact of synoptic weather, regional transport and heterogeneous reactions
resolves10.1038/srep18998Enhanced air pollution via aerosol-boundary layer feedback in China
resolves10.1007/s11430-013-4793-0Modeling study of regional severe hazes over mid-eastern China in January 2013 and its implications on pollution prevention and control
resolves10.1073/pnas.1502596112Reinstate regional transport of PM
<sub>2.5</sub>
as a major cause of severe haze in Beijing
resolves10.1038/srep04172Mineral dust and NOx promote the conversion of SO2 to sulfate in heavy pollution days
resolves10.1002/2015JD023607Enhanced sulfate formation by nitrogen dioxide: Implications from in situ observations at the SORPES station
resolves10.5194/acp-13-4501-2013Formation and evolution mechanism of regional haze: a case study in the megacity Beijing, China
resolves10.1038/nature13774High secondary aerosol contribution to particulate pollution during haze events in China
resolves10.1016/j.atmosenv.2014.04.048The heaviest particulate air-pollution episodes occurred in northern China in January, 2013: Insights gained from observation
resolves10.5194/acp-15-10149-2015Long-term real-time measurements of aerosol particle composition in Beijing, China: seasonal variations, meteorological effects, and source analysis
resolves10.1021/acs.est.5b02373Real-Time Characterization of Aerosol Particle Composition above the Urban Canopy in Beijing: Insights into the Interactions between the Atmospheric Boundary Layer and Aerosol Chemistry
resolves10.5194/acp-15-12879-2015Characteristics and sources of submicron aerosols above the urban canopy (260 m) in Beijing, China, during the 2014 APEC summit
resolves10.1038/srep20668“APEC Blue”: Secondary Aerosol Reductions from Emission Controls in Beijing
resolves10.1016/j.atmosenv.2013.06.019The impact of relative humidity on aerosol composition and evolution processes during wintertime in Beijing, China
resolves10.1126/science.1120120Variability in Nocturnal Nitrogen Oxide Processing and Its Role in Regional Air Quality
resolves10.1002/2015JD023871Chemical composition of aerosol particles and light extinction apportionment before and during the heating season in Beijing, China
resolves10.5194/acp-15-845-2015Characterization of biomass burning emissions from cooking fires, peat, crop residue, and other fuels with high-resolution proton-transfer-reaction time-of-flight mass spectrometry
resolves10.1002/2015JD023918Chemical apportionment of aerosol optical properties during the Asia‐Pacific Economic Cooperation summit in Beijing, China
resolves10.1080/02786821003716599Aerosol Light Extinction Measurements by Cavity Attenuated Phase Shift (CAPS) Spectroscopy: Laboratory Validation and Field Deployment of a Compact Aerosol Particle Extinction Monitor
resolves10.1002/mas.20115Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer
resolves10.1080/02786826.2011.620041Evaluation of Composition-Dependent Collection Efficiencies for the Aerodyne Aerosol Mass Spectrometer using Field Data
resolves10.1002/env.3170050203Positive matrix factorization: A non‐negative factor model with optimal utilization of error estimates of data values
resolves10.5194/acp-9-2891-2009Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data
resolves10.1007/s00216-011-5355-yUnderstanding atmospheric organic aerosols via factor analysis of aerosol mass spectrometry: a review
resolves10.1021/es8011518Characterization of Primary Organic Aerosol Emissions from Meat Cooking, Trash Burning, and Motor Vehicles with High-Resolution Aerosol Mass Spectrometry and Comparison with Ambient and Chamber Observations
resolves10.5194/acp-14-12593-2014Chemical composition, sources, and processes of urban aerosols during summertime in northwest China: insights from high-resolution aerosol mass spectrometry
resolves10.1023/A:1013833217916A Nested Air Quality Prediction Modeling System for Urban and Regional Scales: Application for High-Ozone Episode in Taiwan
resolves10.1023/A:1009604003981ISORROPIA: A New Thermodynamic Equilibrium Model for Multiphase Multicomponent Inorganic Aerosols
resolves10.5194/acp-7-4639-2007ISORROPIA II: a computationally efficient thermodynamic equilibrium model for K
<sup>+</sup>
–Ca
<sup>2+</sup>
–Mg
<sup>2+</sup>
–NH
<sub>4</sub>
<sup>+</sup>
–Na
<sup>+</sup>
–SO
<sub>4</sub>
<sup>2−</sup>
–NO
<sub>3</sub>
<sup>−</sup>
–Cl
<sup>−</sup>
–H
<sub>2</sub>
O aerosols
The 6 references without a DOI — listed, not checked
no DOI — not checkedChinese State Council, Atmospheric Pollution Prevention and Control Action Plan (http://www.gov.cn/zwgk/2013-09/12/content_2486773.htm (in Chinese)), (2013) (Date of access:12/09/2013).
no DOI — not checkedXinhua News Agency, PM2.5: Decrease by approximately 40% in 2020 compared to 2013 (http://news.xinhuanet.com/politics/2015-12/30/c_1117630976.htm (in Chinese), (2015) (Date of access:30/12/2015).
no DOI — not checkedBeijing Municipal Environmental Protection Bureau, Release of new emergency plan for heavy air pollution in Beijing (http://www.bjepb.gov.cn/bjepb/413526/331443/331937/333896/424258/index.html (in Chinese)), (2015) (Date of access:30/03/2015).
no DOI — not checkedSueper, D. ToF-AMS Analysis Software (http://cires.colorado.edu/jimenez-group/ToFAMSResources/ToFSoftware/index.html), (2015) (Date of access:30/05/2015).
no DOI — not checkedSkamarock, W. C. et al. A description of the advanced research WRF version 2. (DTIC Document, 2005).
no DOI — not checkedFast, J. D. & Easter, R. C. In 7th WRF User’s Workshop, Boulder, CO, USA (Citeseer).
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