Among the chemical and physical processes involved in the transformation of pollutants between their sources and their ultimate deposition, those associated with clouds, aerosols and precipitation must be rated as the most difficult both to study and to understand. This book presents a variety of recent advances in this field, including the properties and composition of aerosol particles, chemical transformation and scavenging processes, the relationship between liquid-phase chemistry and cloud micro-physics, entrainment, evaporation and deposition, trends in high Alpine pollution, transport processes, and developments in instrumentation. This book is Volume 5 in the ten-volume series on Transport and Chemical Transformation of Pollutants in the Troposphere.

Inhalt
I Ground-Based Cloud Experiments (GCE).- 1 GCE: an Overview.- 2 Principal Results from GCE.- 3 GCE in Retrospective.- 4 Future Directions for Cloud Research.- 5 Individual Reports from GCE Principal Investigators.- 6 GCE Publications 19901996.- II High Alpine Air and Snow Chemistry.- 7 An Overview of ALPTRAC Research.- 8 Aims and Internal Structure of ALPTRAC.- 9 Principal Scientific Results.- Individual Reports from ALPTRAC Principal Investigators.- 10 High Alpine Snow Pack Chemistry.- 11 Long-Term Pollution Trends.- 12 High Alpine Air, Aerosol and Cloud Chemistry.- 13 Meteorological Support to ALPTRAC.- 14 ALPTRAC Publications 1988-1996.- Suject Index.