Pollen Emissions of Subpollen Particles and Ice Nucleating Particles.

ABSTRACT: Pollen grains significantly contribute to the aerosol population, and levels are predicted to increase in the future. Under humid atmospheric conditions, pollen grains can rupture creating pollen grain fragments referred to as subpollen particles (SPPs) which are dispersed into the atmosphere with wind. In this laboratory study, SPP emission factors were determined for ryegrass, Lolium sp., and giant ragweed,Ambrosia trifida, in terms of the number of SPPs produced per pollen grain and the number of SPPs produced per m², which were compared to previously measured live oak,Quercus virginiana, emission factors. The SPP emission factors were 4.9 × 10¹³ ± 4.3 × 10¹³ SPPs per m² for ryegrass, 1.3 × 10¹⁵ ± 1.1 × 10¹

SUBMITTER: Matthews BH 

PROVIDER: S-EPMC10863449 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature