Shipboard Size Distributions Measurements and Sampling of Aerosol Particles in Ship Plumes at Baltic Sea

DOMINIK SMOK, Jan Hovorka, Pavel Paces, Sandra Pier, Thomas Gröger, Helena Osterholz, Charles University

     Abstract Number: 503
     Working Group: Combustion

Abstract
Size distribution measurements and size-segregated sampling of aerosol particles in ship plumes were conducted on board of a working boat while following large cargo ships. Ship plume from large cargo ship characterized aerosol particle distributions of count median diameter at 20 nm and concentration about 10⁶ per cubic centimeter at the distance round 50 meters from the ship. Increasing the distance, fast degrease of particle concentration at the CMD indicates their significant coagulation and deposition to sea surface. Self-coagulation can be neglected, since the CMD did not increase during the plume dilution. Therefore, coagulation of 20 nm particles with sea aerosol/droplets could be plausible explanation. Such an assumption would be confirmed by chemical analysis of size segregated aerosol particles.

Supported by the Czech Science Foundation (22-03426L) and German Research Foundation (471841824).