Surface sulfur measurements on stratospheric particles

Details Surface sulfur measurements on stratospheric particles Surface sulfur measurements on stratospheric particles

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12...93m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 12, Feb. 1985, p. 93-96.

Physics

24

Aerosols, Atmospheric Composition, Stratosphere, Sulfur, Auger Spectroscopy, Sputtering, Sulfates, Surface Reactions

Scientific paper

The surface chemistries of three particulate samples collected from the lower stratosphere have been determined using a Scanning Auger Microprobe (SAM). These samples are typical of the most abundant natural and anthropogenic particles observed within the stratosphere in the greater-than-2-micron diameter size fraction. Succsessive sputtering and analysis below the first few adsorbed monolayers of all particles shows the presence of a thin (less than 150A) sulfur layer. These sulfur regions probably formed by surface reaction of sulfur-rich aerosols with each particle within the stratosphere. Settling rate calculations show that a typical sphere (10-micron diameter) may reside within the aerosol layer for 20 days and thus provide a qualitative guide to surface sulfur reaction rates.

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