Temporal variations of local traffic CO₂ emissions and its relationship with CO₂ flux in Beijing, China

Cities are the main source of CO₂. Traffic is one of the most important sources of CO₂ emissions in urban areas. One-year CO₂ flux and 36-days traffic flow data were collected by field monitoring in 2014 at the study area. The accurate traffic CO₂ emissions on 30-min scale were calculated by the localized MOVES model. The annual emissions were 4139.19 Mg. The traffic CO₂ emissions showed a “double-peak” diurnal pattern, with morning peak of 705.14 kg 30 min−¹ (8:00–8:30) and the evening peak of 788.40 kg/30 min−¹ (7:30–18:00). The tail number limited measure in Beijing has reached certain extent, with emissions by limited tail number as follows: 1 or 6 (11.03 Mg/d) < 3 or 8 (11.88 Mg/d) < 4 or 9 (12.13 Mg/d) < 2 or 7 (12.32 Mg/d) < 5 or 0 (12.57 Mg/d). The approach to exploring the relationship with traffic CO₂ emissions and CO₂ flux is modified from the perspective of spatial boundary definition and unit unification. Traffic CO₂ emissions had significantly positive effects on the CO₂ flux. The absolute values of the standard coefficients were in the following order: for the whole year in 2014, temperature (−0.316) > radiation (−0.152) > traffic CO₂ emissions (0.107); for the plant growing season, radiation (−0.254) > temperature (−0.130) > traffic CO₂ emissions (0.105).


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  • Accession Number: 01687655
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 21 2018 3:12PM