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Carbonaceous Aerosol Particles From Common Vegetation in the Grand Canyon (open access)

Carbonaceous Aerosol Particles From Common Vegetation in the Grand Canyon

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 by resuspension of surface wax and resin components liberated from the leaves of vegetation common to areas of the Grand Canyon. The samples were analyzed using high-resolution gas chromatography/mass spectrometry (GC/MS). Probable identification of compounds was made by comparison of sample spectra with National Institute of Standards and Technology (NIST) mass spectral references and positive identification of compounds was made when possible by comparison with authentic standards as well as NIST references. Using these references, we have been able to positively identify the presence of n-alkane and n-alkanoic acid homolog series in the surface waxes of the vegetation sampled. Several monoterpenes, sesquiterpenes, and diterpenes were identified also as possible biogenic aerosols which may contribute to the total organic aerosol abundance leading to visibility reduction in the …
Date: May 1992
Creator: Hallock, K. A.; Mazurek, M. A. & Cass, G. R.
Object Type: Report
System: The UNT Digital Library
Hellcat News, (Kingman, Ariz.), Vol. 46, No. 9, Ed. 1, May 1993 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 46, No. 9, Ed. 1, May 1993

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1993
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 47, No. 9, Ed. 1, May 1994 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 47, No. 9, Ed. 1, May 1994

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1994
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 48, No. 9, Ed. 1, May 1995 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 48, No. 9, Ed. 1, May 1995

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1995
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 49, No. 9, Ed. 1, May 1996 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 49, No. 9, Ed. 1, May 1996

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1996
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 50, No. 9, Ed. 1, May 1997 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 50, No. 9, Ed. 1, May 1997

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1997
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 51, No. 9, Ed. 1, May 1998 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 51, No. 9, Ed. 1, May 1998

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1998
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History
Hellcat News, (Kingman, Ariz.), Vol. 52, No. 9, Ed. 1, May 1999 (open access)

Hellcat News, (Kingman, Ariz.), Vol. 52, No. 9, Ed. 1, May 1999

Newsletter published by the 12th Armored Division Association, discussing news related to the activities of the U.S. Army unit and updates on previous members of the division.
Date: May 1999
Creator: Twelfth Armored Division Association (U.S.)
Object Type: Newspaper
System: The Portal to Texas History