Aerosol - Cloud Interactions and Precipitation in a Global Scale
Aerosol - Cloud Interactions and Precipitation in a Global Scale Aerosol - Cloud Interactions and Precipitation in a Global Scale
Total aerosol, cloud condensation nuclei(CCN), and ice nuclei (IN) concentrationsas a function of temperature.• In order to enhanceprecipitation the conceptof seeding is to seed withappropriate CCN or IN tomake precipitation developmore efficiently.
Main Points:1. Aerosols Have Changed:• CCN: sulfate is about 70% anthropogenic, withemissions that have varied with location (e.g.,peaking for the US about 1970 but increasingconcentrations in some other parts of the world)• Desert dust concentrations fluctuate over a widerange. These have good ice nucleating ability, andare likely candidates for the ice nuclei that are ofimportance to precipitation formation.2. Preliminary indications are that this could have changedprecipitation processes in significant ways depending onthe background pollution and aerosols in a specificregion. These results apply both to inadvertent andadvertent weather modification.
- Page 2: The aerosol/precipitationconnection
- Page 6 and 7: Microphysical processes in precipit
- Page 10 and 11: Main Points: (cont.)3. Aerosol comp
- Page 12 and 13: INSTRUMENTED RESEARCHAIRCRAFTTrace
- Page 14 and 15: West Africa Aerosols27 March 2007
- Page 16 and 17: Cloud parameters
- Page 18 and 19: Real time Aerosol and Environmental
- Page 20 and 21: Summary• Spatial and temporal cha
Total aerosol, cloud condensation nuclei(CCN), <strong>and</strong> ice nuclei (IN) concentrationsas a function of temperature.• In order to enhanceprecipitation the conceptof seed<strong>in</strong>g is to seed withappropriate CCN or IN tomake precipitation developmore efficiently.
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