Application of Atmospheric Electrical Instrumentation for Detection of Aerosol Plumes and Atmospheric Structure.

摘要

The basic objective of this research has been to compare in-situ measurements of aerosol plumes with atmospheric electrical records in order to evaluate the potential of the latter. Initial efforts involved securing and installing an integrating nephelometer (Meteorology Research Inc. Model 1550B) in the Bellanca atmospheric research aircraft. The nephelometer is sensitive to aerosols in the 0.1to 2micrometers diameter size range. In general there are three peaks in the distribution of atmospheric aerosols; (1) The 'Coarse'Mode;mechanically generated particles such as dust in the 5to 10micrometers size range, (2) The 'accumulation'mode:typically formed by combustion processes,these grow to 0.5to 1.0micrometers and are optimally sized for measurement with a light scattering device such as the integrating nephelometer, (3) The 'fresh'mode:also formed from combustion,these are in the 0.01to 0.1micrometers size range. They grow rapidly by coagulation and agglomeration into the accumulation mode typically in a few minutes up to a maximum of 20minutes.