Japan Geoscience Union Meeting 2021

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A (Atmospheric and Hydrospheric Sciences ) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC25] Glaciology in the new normal

Thu. Jun 3, 2021 5:15 PM - 6:30 PM Ch.04

convener:Hiroto Nagai(Waseda Univ., School of Education), Kzutaka Tateyama(National University Corporation Kitami Institute of Technology), Ishikawa Mamoru(Hokkaido University), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

5:15 PM - 6:30 PM

[ACC25-P01] Evidence for long-range transport of atmospheric microplastic

*Osamu Nagafuchi1, Koyomi Nakazawa1 (1.Fukuoka Institute of Techology)

Keywords:rime-ice, microplastic, long-range transport

In these days, marine, freshwater and terrestrial pollution with microplastics (MPs) has been discussed extensively, whereas there are few reports on long-range transport of atmospheric MPs. Here, we attempted to detect atmospheric MPs by focusing on rime-ice on mountain site located in the free troposphere. MPs were identified by Fourier transform infrared imaging in all samples. The MPs concentrations of rime-ice was significantly higher (10~20 ×10-3 N liter-1) than snow on same mountain (1×10-3 N liter-1). The major polymer which detected was polyethylene. Most of particles were in the smaller size below 50mm. Furthermore, from the results of the back trajectory analysis, our data emphasize that atmospheric transport and deposition can be notable pathways for MPs.