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Carbonaceous Aerosol Particles From Common Vegetation in the Grand Canyon

Description: The problem of visibility reduction in the Grand Canyon due to fine organic aerosol particles in the atmosphere has become an area of increased environmental concern. Aerosol particles can be derived from many emission sources. In this report, we focus on identifying organic aerosols derived from common vegetation in the Grand Canyon. These aerosols are expected to be significant contributors to the total atmospheric organic aerosol content. Aerosol samples from living vegetation were collected… more
Date: May 1992
Creator: Hallock, K. A.; Mazurek, M. A. & Cass, G. R.
Item Type: Refine your search to only Report
Location: None
Partner: UNT Libraries Government Documents Department
open access

Two-Dimensional Computer Simulation of Hypervelocity Impact Cratering: Some Preliminary Results for Meteor Crater, Arizona

Description: A computational approach used for subsurface explosion cratering was extended to hypervelocity impact cratering. Meteor (Barringer) Crater, Arizona, was selected for the first computer simulation because it is one of the most thoroughly studied craters. It is also an excellent example of a simple, bowl-shaped crater and is one of the youngest terrestrial impact craters. Initial conditions for this calculation included a meteorite impact velocity of 15 km/s, meteorite mass of 1.67 x 10/sup 8/ kg… more
Date: June 1978
Creator: Bryan, J. B.; Burton, D. E.; Cunningham, M. E. & Lettis, L. A., Jr.
Item Type: Refine your search to only Article
Location: None
Partner: UNT Libraries Government Documents Department
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