Chemistry and Climate
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Use of multi-variant cluster analysis for deriving the origin of aerosols in the Upper Troposphere
The chemical composition of the upper troposphere (UT) is affected by strong convective events from the lower troposphere, intrusions of ozone-rich stratospheric air and advective mixing of chemically processed air. In addition to gaseous compounds, most air masses contain aerosol particles
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Flight route taken by passenger aircraft participating in CARIBIC (left) and the frequency at which air-masses of different origins are encountered with respct to longitude and season. Nomenclature: lowermost stratosphere (LMS), tropopause (TP), high clouds (HC), free troposphere (FT) and boundary layer (BL).
