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Optics Letters

Optics Letters

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  • Vol. 6, Iss. 1 — Jan. 1, 1981
  • pp: 24–26

Long-wave stratospheric transmission of Mount St. Helens ejecta

P. M. Kuhn, L. C. Haughney, and R. C. Innis  »View Author Affiliations


Optics Letters, Vol. 6, Issue 1, pp. 24-26 (1981)
http://dx.doi.org/10.1364/OL.6.000024


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Abstract

The NASA/Ames Research C-141 aircraft underflew the Mount St. Helens ejecta plume in Utah three days after the eruption. Upward-looking 20–40-μm on-board radiometry provided data resulting in a calculated long-wave transmission of 0.93. From this value, an optical depth of 0.073 is inferred. This value is compared with an accepted background, stratospheric infrared optical depth of 0.06. Assumptions on particle size, shortwave albedo, and thermal warming imply little surface temperature change caused by the ejecta on the third day immediately following the eruption.

© 1981 Optical Society of America

History
Original Manuscript: September 25, 1980
Published: January 1, 1981

Citation
P. M. Kuhn, L. C. Haughney, and R. C. Innis, "Long-wave stratospheric transmission of Mount St. Helens ejecta," Opt. Lett. 6, 24-26 (1981)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-6-1-24


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References

  1. P. A. Davis, “Applications of an airborne ruby lidar during a BOMEX program of cirrus observations,” J. Appl. Meteorol. 10, 1314 (1971). [CrossRef]
  2. P. M. Kuhn, “Airborne observations of contrail effects on the thermal radiation budget,” J. Atmos. Sci. 27, 937 (1970). [CrossRef]
  3. Scientific Event Alert Network Bulletin, Smithsonian Institution, Washington, D.C., May31, 1980.
  4. J. E. Hansen, W. C. Wang, A. A. Lacis, “Mount Agung eruption provides test of a global climatic perturbation,” Science 199(3), 1065 (1978). [CrossRef] [PubMed]
  5. O. B. Toon, J. B. Pollack, “Atmospheric aerosols and climate,” Am. Sci. 68(3), 268 (1980).
  6. J. E. Hansen, W. C. Wang, A. A. Lacis, “Climatic effects of atmospheric aerosols,” in Proceedings of Conference on Aerosols: Urban and Rural Characteristics, Source and Transport Studies (New York Academy of Science, New York, 1979).

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