文献类型：期刊文献

英文题名：Monsoon-driven circulation modulates the composition and loading of black carbon aerosol in a tropical coastal city

作者：Xu, Renhao[1,2];Lao, Qibin[1,3,4];Chen, Chunqing[1,3,4];Zhou, Xin[1,3,4];Chen, Fajin[1,3,4]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang 524088, Peoples R China

年份：2026

卷号：368

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:001660366100001)、、EI(收录号：20260219871775)、Scopus(收录号：2-s2.0-105026656418)、WOS

基金：This study was supported by the Basic and Applied Basic Research Foundation of Guangdong Province (2023B1515120029) , the Guang-dong Basic and Applied Basic Research Foundation (2024A1515110183, 2023A1515110473) , College Student Innovation Training Program of Guangdong Ocean University (202310566007) , and program for scien-tific research start-upfunds of Guangdong Ocean University (060302032502) .

语种：英文

外文关键词：Black carbon aerosol; Monsoon circulation; Stable carbon isotope composition; Cross-sea transport; Coastal city

外文摘要：Since the Industrial Revolution, human activities have significantly increased atmospheric black carbon (BC) aerosols, harming air quality, human health, and regional climate. Although the research on the characteristics and sources of atmospheric BC has expanded, understanding of its cross-sea transport remain limited. Zhanjiang city, located on the coast of the northern South China Sea, experiences pronounced monsoon influences and has heavy industries. However, this region maintains good air quality. We hypothesize that monsoon circulation may significantly influence BC pollution. To verify this hypothesis, aerosol samples were continuously collected in Zhanjiang from 2018 to 2019. Results showed clearly seasonal variations in BC concentration and its carbon isotopic values, indicating they are not primarily influenced by local emission sources, as local emissions remain relatively constant. Instead, lower values in summer and higher values in other seasons align closely with monsoon transitions, suggesting that a significant role of monsoon circulation in driving these variations. Backward trajectory model (HYSPLIT) and the potential source contribution factor analysis model (PSCF) further revealed distinctly different air mass pathways between summer (ocean air masses) and other seasons (terrestrial air masses). A Bayesian mixing model indicated that the combustion of fossil fuels (58 %, including 30 % of liquid fuel and 28 % of coal) is the predominant source of BC entering Zhanjiang with air masses. Correlation analyses with water-soluble inorganic ions revealed that BC exhibited significantly weaker associations with terrestrial pollution compared to TC, due to substantial contributions from secondary aerosols to TC during longrange transport. This study suggested that monsoon-driven circulation plays a critical role in aerosol transport and composition in the coastal region, providing new insights into atmosphere-ocean carbon exchange.