TY - JOUR
T1 - Gaseous polycyclic aromatic hydrocarbons over the South China Sea
T2 - Implications for atmospheric transport under monsoon influences
AU - Zheng, Haowen
AU - Liu, Mengyang
AU - Lohmann, Rainer
AU - Li, Daning
AU - Vojta, Simon
AU - Katz, Samuel
AU - Wang, Weimin
AU - Ke, Hongwei
AU - Wang, Chunhui
AU - Cai, Minggang
PY - 2023/6
Y1 - 2023/6
N2 - The seasonal monsoon variations have significant impact on the atmospheric transport of semi-volatile organic pollutants over the South China Sea (SCS). We analyzed polycyclic aromatic hydrocarbons (PAHs) over the basin and island areas (Yongxing Island and Yongshu Island) in 2017. Gaseous PAHs (0.17–1.4 ng m−3) showed spatio-temporal distinctions in their composition and sources among the basin and island areas. Mixed combustion sources of PAHs were identified over the SCS, including a petroleum source near the island areas. The transport routes of PAHs were inferred by the air mass back trajectories and potential source contribution factor analysis, identifying strong biomass burning signals from the Indochina Peninsula and other Southeast Asian countries. Emissions from approximately 90 % of the combustion sources were transported to basin areas by monsoons, whereas the island areas were dominated by local emissions. This study emphasizes the main potential terrestrial source of PAHs over the SCS under monsoon influences. © 2023 Elsevier Ltd
AB - The seasonal monsoon variations have significant impact on the atmospheric transport of semi-volatile organic pollutants over the South China Sea (SCS). We analyzed polycyclic aromatic hydrocarbons (PAHs) over the basin and island areas (Yongxing Island and Yongshu Island) in 2017. Gaseous PAHs (0.17–1.4 ng m−3) showed spatio-temporal distinctions in their composition and sources among the basin and island areas. Mixed combustion sources of PAHs were identified over the SCS, including a petroleum source near the island areas. The transport routes of PAHs were inferred by the air mass back trajectories and potential source contribution factor analysis, identifying strong biomass burning signals from the Indochina Peninsula and other Southeast Asian countries. Emissions from approximately 90 % of the combustion sources were transported to basin areas by monsoons, whereas the island areas were dominated by local emissions. This study emphasizes the main potential terrestrial source of PAHs over the SCS under monsoon influences. © 2023 Elsevier Ltd
KW - Atmospheric transport
KW - Biomass burning
KW - Polycyclic aromatic hydrocarbons (PAHs)
KW - Seasonal trends
KW - Transboundary transport
UR - http://www.scopus.com/inward/record.url?scp=85153801913&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85153801913&origin=recordpage
U2 - 10.1016/j.marpolbul.2023.114982
DO - 10.1016/j.marpolbul.2023.114982
M3 - RGC 21 - Publication in refereed journal
SN - 0025-326X
VL - 191
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
M1 - 114982
ER -
