Abstract

The intensities of the atmospheric lines P25, P26, P27, and P29 of the 2.16-μ band of N₂O and of the 5–6 line of the 1.66-μ band of CH₄ have been measured in the spectrum of the low-sun observed from Mount Wilson. For both molecules, the rate of change of intensity with solar zenith angle is inconsistent with the existence of these gases in thin layers at altitudes of 15 km or greater. On the other hand, the observations satisfy very well the assumption of uniform mixing with the major constituents of the atmosphere.

© 1953 Optical Society of America

Abundance of Methane in the Earth’s Atmosphere*

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Investigations of Atmospheric CO at the Jungfraujoch

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