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Temporal variations and chemical characteristics of marine PM2.5 at Dongsha Islands, South China Sea: Three-year measurement.
Huang, Zi-You; Yuan, Chung-Shin; Yen, Po-Hsuan; Tu, I-Chieh; Tseng, Yu-Lun.
Afiliación
  • Huang ZY; Institute of Environmental Engineering, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan.
  • Yuan CS; Institute of Environmental Engineering, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan; Aerosol Science Research Center, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan. Electronic address: ycsngi@mail.nsysu.edu.tw.
  • Yen PH; Institute of Environmental Engineering, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan.
  • Tu IC; Institute of Environmental Engineering, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan.
  • Tseng YL; Institute of Environmental Engineering, National Sun Yat-sen University, 70, Lian-Hai Road, Kaohsiung, 804, Taiwan.
Environ Pollut ; 356: 124378, 2024 Sep 01.
Article en En | MEDLINE | ID: mdl-38885829
ABSTRACT
The study of long-range transport effects on marine fine particles (PM2.5), particularly in remote sites such as the Dongsha Islands, is pivotal for advancing our understanding of air pollution dynamics on a regional scale and for formulating effective environmental policies. PM2.5 concentrations were examined over three consecutive years and grouped based on their transport routes. The backward trajectory simulation revealed that high PM2.5 concentrations were observed in the West Channel, originating from North and Central China, the Korean Peninsula, and the Japanese Islands, opposed to the East Channel. High PM2.5 concentrations, commonly observed in winter and spring, were mainly attributed to the Asian Northeastern Monsoons. Water-soluble inorganic ions constituted the major components, accounting for 37.8-48.7% of PM2.5, and followed by metal elements (15.5-20.0%), carbons (7.5-13.3%), levoglucosan (0.01-0.17%), and organic aerosols (0.2-2.2%). Secondary inorganic aerosols as the dominant source accounted for 8.3-24.7% of PM2.5, while sea salts were the secondary major contributor. High levoglucosan contribution (3.8-7.2%) in winter and spring was attributed to biomass burning, mainly from the Indochina Peninsula. Chemical mass balance receptor modeling resolved that major sources of PM2.5 were secondary sulfate, sea salts, fugitive dust, and industrial boilers. This study concluded that the long-range transport of PM2.5 gradually increased since fall, contributing 52.1-74.3%, highlighting its substantial impact on PM2.5 in all seasons except summer.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Monitoreo del Ambiente / Contaminantes Atmosféricos / Material Particulado País/Región como asunto: Asia Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Monitoreo del Ambiente / Contaminantes Atmosféricos / Material Particulado País/Región como asunto: Asia Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Reino Unido