Abstract: Stratospheric nitric acid vapor was collected by sorption on cellulose filters impregnated with dibutoxy-ethylpthalate. The sampling was conducted by both stratospheric aircraft and balloons from 53S to 65N up to altitudes ...

Abstract: Evidence is presented indicating that nitrate present in stratospheric filtration samples represents adsorbed nitric acid vapor. The concentrations observed are comparable to those found by solar infrared spectrometry. ...

Abstract: An extensive series of experiments is being undertaken to determine the concentrations and transport of trace atmospheric constituents in the stratosphere and troposphere in the vicinity of jet streams during tropopause ...

Abstract: The relative efficiencies of impactors of the type used by Junge and co-workers for collecting stratosphere sulfate particles and of filters used in these laboratories have been determined by flying these collecting devices ...