Methane and carbon dioxide increases in the urban boundary layer: Inferences from whole‐column infrared absorbance measurements

K. R. Gurney, A. D.A. Hansen, H. Rosen

Research output: Contribution to journalArticle

3 Scopus citations


Using the sun as an infrared source, we determined the total atmospheric column absorbance of methane and carbon dioxide spectral lines in the 8‐ to 10‐µm infrared region. At our laboratory located in an urban region, these absorbances showed fluctuations larger than can be accounted for by known variabilities in the background atmosphere. We interpret these observations in terms of large changes in concentration of methane and carbon dioxide within the urban boundary layer. These increases could affect the radiative balance in urban locations and contribute to the urban heat island.

Original languageEnglish (US)
Pages (from-to)32-35
Number of pages4
JournalGeophysical Research Letters
Issue number1
StatePublished - Jan 1988


ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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