Toward anthropogenic combustion emission constraints from space-based analysis of urban CO2/CO sensitivity

Sam J. Silva, Avelino F. Arellano, Helen M. Worden

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


We explore the value of multispectral CO retrievals from NASA/Terra Measurement of Pollution In The Troposphere (MOPITT v5), along with Atmospheric CO2 Observations from Space (ACOSv2.9) CO2 retrievals from the Japan Aerospace Exploration Agency Greenhouse Gases Observing Satellite (GOSAT), for characterizing emissions from anthropogenic combustion. We use these satellite retrievals to analyze observed CO2/CO enhancement ratios (ΔCO2/ΔCO) over megacities. Since CO is coemitted with CO2 in anthropogenic combustion, the observed ΔCO 2/ΔCO characterizes the general trend in combustion activity. Our analyses show patterns in ΔCO2/ΔCO that correspond well with the developed/developing status of megacities, and ΔCO 2/ΔCO that agree well with available literature and emission inventories to approximately 20%. Comparisons with ΔCO2/ ΔCO derived from Total Carbon Column Observing Network measurements show similar agreement, where some of the differences in observed ΔCO 2/ΔCO are due to representativeness and limited GOSAT data. Our results imply potential constraints in anthropogenic combustion from GOSAT/MOPITT, particularly in augmenting our carbon monitoring systems.

Original languageEnglish (US)
Pages (from-to)4971-4976
Number of pages6
JournalGeophysical Research Letters
Issue number18
StatePublished - Sep 28 2013


  • anthropogenic combustion
  • emissions
  • enhancement ratios
  • megacities

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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