Corrections for particle losses and sizing errors during aircraft aerosol sampling using a rosemount inlet and the PMS LAS-X

In situ flight measurements of accumulation mode aerosol particles were performed in the upper troposphere during the 1991/1992 EASOE (European Arctic Stratospheric Ozone Experiment). On-line number size distributions were obtained by using an optical particle counter, the PMS LAS-X. Support data, like ozone mixing ratios, and meteorological as well as flight parameters were collected simultaneously. The present study analyses the particle sampling system used aboard the Transall aircraft. A correction algorithm for particle losses and sizing errors is developed based on calculations. A corrected number size distribution is compared with measurements reported in the literature.