In situ measurements of microphysical properties and trace gases in two cumulonimbus anvils over western Europe
1999; American Geophysical Union; Volume: 104; Issue: D10 Linguagem: Inglês
10.1029/1999jd900188
ISSN2156-2202
AutoresJ. Ström, Horst Fischer, Jos Lelieveld, F. Schröder,
Tópico(s)Atmospheric chemistry and aerosols
ResumoThis study presents in situ measurements performed in two cumulonimbus anvils over western Europe during the Stratosphere‐Troposphere Experiment by Aircraft Measurements (STREAM) in July 1994. Sampling of cloud particles between 5 and 60 μm aerodynamic diameter was performed using a counterflow virtual impactor. Peak values of cloud water content and crystal number density for this size‐range exceeded 2 g m −3 and 200 cm −3 (normalized to standard temperature and pressure), respectively. Concurrent measurements of aerosol particles, water vapor, CO, and O 3 support the idea that much of the air in the anvil has been rapidly transported directly from the boundary layer while experiencing limited dilution.
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