According to Zeng et al. (2019) the concentration of particulate matter have decreased significantly in China since 2013. Whether this decrease can be detected eastward, remains to be validated. It is expected that a decrease of Long-range Transboundary Air Pollutants (LTP) will have a positive feedback in the air quality of many cities of Japan. To validate this assumption, it is necessary to perform continuous monitoring of atmospheric aerosols, especially in remote sites. Due to its special location, NOTOGRO (acronym for NOTO Ground-based Research Observatory) is scarcely affected by local emissions and it is well suited for these studies. The presentation will focus on the trend of the aerosol physical properties monitored in Notogro from 2013 to 2019. The influence of LTP with respect to the background will be treated. The findings support that LTP arriving in Notogro are changing, as response to the decrease scenario of the Asian continent emissions.

Reference: Zeng et al. (2019). Sci Total Environ. 663:329-337. Doi: 10.1016/j.scitotenv.2019.01.