Abstract

The horizontal attenuation of ultraviolet light by the air near the ground was determined as a continuous function of wavelength from 2300 to 4600 A. Measurements were made by means of photographic spectrophotometry on seventy-eight nights during 1949 at Pasadena, California, and also on three nights during 1950 at Washington, D. C. The results are given in the form of a table of attenuation coefficients (km−1) at selected wavelengths and in the form of representative spectral attenuation curves for conditions ranging from fog to exceptionally clear air. Except for weak oxygen absorption bands between 2421 and 2700 A, the attenuation coefficient was found to vary quite smoothly (though differently) with wavelength on all nights. Air pollutants, though frequently present, were not spectroscopically identified except for sulfur dioxide, which was encountered in measurable concentration in Washington. Ozone concentrations could be estimated from a few spectra obtained in exceptionally clear weather.

© 1955 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Attenuation by Artificial Fogs in the Visible, Near Infrared, and Far Infrared

David R. Johnston and Darrell E. Burch
Appl. Opt. 6(9) 1497-1501 (1967)

Attenuation of Light in the Lower Atmosphere*

E. O. Hulburt
J. Opt. Soc. Am. 25(5) 125-130 (1935)

System for simultaneous sensing of sulfur dioxide and carbon disulfide based on deep ultraviolet absorption spectroscopy

Lin Wang, Yungang Zhang, Xue Zhou, and Zhiguo Zhang
Appl. Opt. 58(13) 3325-3330 (2019)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription