Contributions of long-range transport from the Asian continent and local emissions on atmospheric PM_2.5, polycyclic aromatic hydrocarbons, and their nitro-derivatives in Kanazawa and Noto Peninsula, Japan.

ABSTRACT: This study collected samples of particulate matter that are 2.5 μm or less in diameter (PM_2.5) in Kanazawa, Japan, and Noto Peninsula located 100 km north on the windward side of the westerlies from the Asian continent and characterized the extent of polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs (NPAHs) pollution in Kanazawa. Emission areas and specific sources of PM_2.5 and of PAHs and NPAHs were clarified via back-trajectory analysis and the NP-method, respectively. The results indicate that during 2020 and 2021, most PAHs (93%) in Kanazawa were transported from the Asian continent by westerlies and that the main source was coal and biomass combustion. The presence of NPAHs in Kanazawa was caused by a mixture of transport from the Asian continent (53%) and l

SUBMITTER: Hayakawa K 

PROVIDER: S-EPMC10920709 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature