Gaseous ammonia and ammonium ions in the free troposphere

Details Gaseous ammonia and ammonium ions in the free troposphere Gaseous ammonia and ammonium ions in the free troposphere

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..503z&link_type=abstract

Nature (ISSN 0028-0836), vol. 321, May 29, 1986, p. 503-505. BMFT-supported research.

Computer Science

11

Ammonia, Atmospheric Chemistry, Atmospheric Composition, Gas Ionization, Troposphere, Aerosols, Air Pollution, Mass Spectroscopy

Scientific paper

Due to its large proton affinity or gas-phase basicity, ammonia vapor is expected to react with atmospheric gaseous positive ions, leading to gaseous NH4(+) 'core ions'. Detection of these ions, which have not yet been observed in the free atmosphere, may provide sensitive means of detecting atmospheric ammonia vapor. The first measurements of this ion in the free atmosphere at altitudes from 4000 to 8000 m are reported here. Ammonia vapor abundances inferred from these data are very low, suggesting efficient heterogeneous ammonia removal and very low ammonia saturation pressures over aerosols.

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