Optical Review

, 4:240 | Cite as

Measurement of atmospheric NO2 column density with kitt peak solar flux atlas as a reference

  • Jian Guo Niu
  • Yasushi Sakurada
  • Hiroaki Kuze
  • Nobuo Takeuchi
Regular Papers Information Optics

Abstract

The vertical column abundance of NO2 is measured using direct sunlight. The solar spectra in the wavelength region of 430–450 nm observed from the earth’s surface are ratioed with a reference spectrum taken from the Kitt Peak Solar Flux Atlas. The large Fraunhofer features (20–40%) are eliminated by wavelength correction, resolution matching and ratioing of observed spectra to the reference. The retrieved values of the NO2 vertical column density are in a range of (2–15)x1016 molecules/cm2 with an accuracy of better than 3%. This result demonstrates the usefulness of the Kitt Peak Atlas in the study of tropospheric NO2 concentration, giving a standard extraterrestrial solar spectrum for the case in which the Langley method is not readily applicable.

Key Words

nitrogen dioxide vertical column density extraterrestrial solar spectrum urban air pollution 

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Copyright information

© The Optical Society of Japan 1997

Authors and Affiliations

  • Jian Guo Niu
    • 1
  • Yasushi Sakurada
    • 1
  • Hiroaki Kuze
    • 1
  • Nobuo Takeuchi
    • 1
  1. 1.Center for Environmental Remote SensingChiba UniversityInage-ku, ChibaJapan

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