Optical Review

, 4:240

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

Authors

  • Jian Guo Niu
    • Center for Environmental Remote SensingChiba University
  • Yasushi Sakurada
    • Center for Environmental Remote SensingChiba University
  • Hiroaki Kuze
    • Center for Environmental Remote SensingChiba University
  • Nobuo Takeuchi
    • Center for Environmental Remote SensingChiba University
Regular Papers Information Optics

DOI: 10.1007/BF02931689

Cite this article as:
Niu, J.G., Sakurada, Y., Kuze, H. et al. Optical Review (1997) 4: 240. doi:10.1007/BF02931689

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 dioxidevertical column densityextraterrestrial solar spectrumurban air pollution

Copyright information

© The Optical Society of Japan 1997