Elemental carbon (EC), the highly recalcitrant carbonaceous material released exclusively from fossil fuel combustion and biomass burning, is a preferred geochemical agent for evaluating anthropogenic activities. We investigated the spatiotemporal trends of EC and char/soot ratios (char and soot, the two subtypes of EC, differ in formation mechanisms and physicochemical characteristics) in five sediment cores from eastern China marginal seas, spatially spanning from inshore coastal mud areas to offshore remote mud areas. The temporal profiles of EC depositional fluxes closely tracked socioeconomic development in China over the past similar to 150 years, with the most pronounced increasing trend beginning in the early 1980s, commensurate with the implementation of national policy of Reform and Open in 1978. The temporal EC profiles in China differed significantly from those in European/American countries, reflecting their different socioeconomic development stages. The spatiotemporal trends of char/soot ratios were also highly informative. Temporally, they decreased from bottom to subsurface layers, indicating the switch of China from an agricultural economy to an industrial economy during the 20th century. Spatially, they decreased from inshore to offshore areas, suggesting the differential transport patterns of EC among these sampling regimes. Publication name | ENVIRONMENTAL SCIENCE & TECHNOLOGY, 52 (17):9704-9712; 10.1021/acs.est.8b00033 SEP 4 2018 | Author(s) | Fang, Yin; Chen, Yingjun; Lin, Tian; Hu, Limin; Tian, Chongguo; Luo, Yongming; Yang, Xin; Li, Jun; Zhang, Gan | Corresponding author(s) | CHEN Yingjun yjchentj@tongji.edu.cn; Tongji Univ, Key Lab Cities Mitigat & Adaptat Climate Change S, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China. Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China. LIN Tian lintian@vip.gyig.ac.cn Chinese Acad Sci, Guiyang Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China. | View here for the details
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