Direct sampling and bioanalyses of atmospheric bioaerosols via an unmanned aerial vehicle (UAV) over S17 Base, East Antarctica
摘要
Atmospheric bioaerosol sampling is being extensively conducted in Antarctica. In this study, bioaerosol sampling was conducted at a 900-m altitude over S17 Base in the coastal region of Antarctica using an unmanned aerial vehicle (UAV) on January 10, 2019. Based on the meteorological data collected using the UAV, bioaerosol samples were obtained from a high mixed layer and/or the low free troposphere. Bacteria belonging to the class Chloroplast were detected in the upper air. Those were also observed at an altitude of about 1000 m over Syowa Station in 2013 (Kobayashi, 2022a), suggesting that they may be persistent in the upper atmosphere over East Antarctica. In the upper air, bacteria belonging to the genera Arcobacter, Finegoldia, and Methyloversatilis were particularly detected. From backward trajectory analyses of the air mass, these bacteria may have been transported long distance.