Cosmic ray-induced aerosol-formation: First observational evidence from aircraft-based ion mass spectrometer measurements in the upper troposphere

Details Cosmic ray-induced aerosol-formation: First observational evidence from aircraft-based ion mass spectrometer measurements in the upper troposphere Cosmic ray-induced aerosol-formation: First observational evidence from aircraft-based ion mass spectrometer measurements in the upper troposphere

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29n..43e&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 14, pp. 43-1, CiteID 1698, DOI 10.1029/2002GL015044

Physics

33

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Ion Chemistry Of The Atmosphere (2419, 2427), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

Large positive cluster ions with atomic mass numbers up to 2500 have for the first time been detected in the upper troposphere using an aircraft-based large ion mass spectrometer (LIOMAS). Three ion families seem to be present (types 1, 2 and 3). Type 1 ions probably are H+BbWw (W is H2O and B is mostly acetone (CH3)2CO, and b <= 2). Type 2 ions are probably H+BbAaWw (A = H2SO4) formed by A-attachment to type 1 ions. Type 3 ions are probably very small charged aerosols formed preferably by type 1 ion attachment to stable electrically neutral AxWy clusters. The latter are preferably formed by ion-ion recombination. Hence our observations provide strong evidence for the ion-mediated formation and growth of aerosol particles in the upper troposphere.

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