Urban background aerosols: Negative correlations of particle modes and fragmentation mechanism

Details Urban background aerosols: Negative correlations of particle modes and fragmentation mechanism Urban background aerosols: Negative correlations of particle modes and fragmentation mechanism

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3411811g&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 11, CiteID L11811

Mathematics

Logic

1

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Oceanography: Biological And Chemical: Aerosols (0305, 4906)

Scientific paper

We demonstrate new powerful methods of statistical analysis of atmospheric aerosols on the example of urban background aerosol in the Brisbane area, Australia. It is shown that even in the absence of notable features on the size distribution, it is still possible to identify distinct particles modes and analyze their mutual interactions and transformations. The obtained unique anti-symmetric correlation patterns between particle modes may serve as fingerprints of particular evolutionary processes in the background aerosols. The obtained results suggest that thermal fragmentation of nano-particles may be one of the major physical mechanisms shaping urban background aerosols. In particular, based on the fragmentation theorem, we demonstrate possible existence of substantially different time scales for fragmentation of atmospheric aerosols. The proposed approaches and obtained results may also be important for the analysis of different types of atmospheric aerosols on local, regional and global scales.

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