Advances in Atmospheric Sciences

, Volume 31, Issue 6, pp 1343–1352 | Cite as

Constraining anthropogenic CH4 emissions in Nanjing and the Yangtze River Delta, China, using atmospheric CO2 and CH4 mixing ratios

  • Shuanghe Shen
  • Dong Yang
  • Wei Xiao
  • Shoudong Liu
  • Xuhui Lee


Methane (CH4) emissions estimated with the Intergovernmental Panel on Climate Change (IPCC) inventory method at the city and regional scale are subject to large uncertainties. In this study, we determined the CH4:CO2 emissions ratio for both Nanjing and the Yangtze River Delta (YRD), using the atmospheric CH4 and CO2 concentrations measured at a suburban site in Nanjing in the winter. The atmospheric estimate of the CH4:CO2 emissions ratio was in reasonable agreement with that calculated using the IPCC method for the YRD (within 20%), but was 200% greater for the municipality of Nanjing. The most likely reason for the discrepancy is that emissions from unmanaged landfills are omitted from the official statistics on garbage production.

Key words

methane IPCC inventory atmospheric mixing ratio city region 


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Copyright information

© Chinese National Committee for International Association of Meteorology and Atmospheric Sciences, Institute of Atmospheric Physics, Science Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Shuanghe Shen
    • 1
    • 2
  • Dong Yang
    • 3
  • Wei Xiao
    • 1
    • 2
  • Shoudong Liu
    • 1
  • Xuhui Lee
    • 1
    • 4
  1. 1.Yale-NUIST Center on Atmospheric Environment & Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science & TechnologyNanjingChina
  2. 2.Jiangsu Key Laboratory of Agricultural MeteorologyNanjing University of Information Science & TechnologyNanjingChina
  3. 3.Ningbo Meteorological ObservatoryNingboChina
  4. 4.School of Forestry and Environmental StudiesYale UniversityNew HavenUSA

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