多环芳烃(PAHs)是化石燃料燃烧的优良示踪剂,自然火灾和石油污染,并已广泛用于在各种时间尺度上重建过去的野火和工业活动。这里,第一次,我们从辽东湾两个平行的海洋沉积物岩心获得了PAHs的高分辨率(年度至十年级)记录,中国东北重建工业活动,从1815年到2014年,跨越了200年。我们的数据表明,PAH变化可分为四个阶段:I)1815年至1890年工业化前时期自然火灾和家庭木材燃烧产生的低(可能接近背景)PAH;II)第二次世界大战(1891-1945年)期间间歇性战争产生的PAH浓度略有增加(但波动较大),1946年(1946-1965年)后工业活动增加;III)一段停滞期,在某些情况下,“文化大革命”(1966年至1979年)期间PAHs的减少;IV)1979年后PAHs的快速持续增加与经济快速发展有关,从1979年到2014年,PAH浓度翻了一番。PAH分布的变化表明,随着时间的推移,植被/木材的主要燃料类型发生了重大变化,煤炭和木材,在过去的200年里,其次是煤炭和石油(包括车辆排放)。我们发现,PAH记录也显示出与国内经济和估计的区域人类世工业活动二氧化碳排放量相似的趋势,表明沉积PAH通量可用作间接和定性的代理,以跟踪区域人为CO2排放的趋势。
Polycyclic aromatic hydrocarbons (PAHs) are excellent tracers for fossil fuel combustion, natural fires and petroleum contamination, and have been widely used for reconstructing past wildfires and industrial activities at a variety of time scales. Here, for the first time, we obtain a high resolution (annual to decadal scale) record of PAHs from two parallel marine sediment cores from the Liaodong Bay, Northeastern
China to reconstruct the industrial activities, spanning the past ∼ 200 years from 1815 to 2014. Our data indicate that PAH variations can be divided into four episodes: I) low (probably near background) PAHs from natural fires and domestic wood combustion during the pre-industrial period from 1815 to 1890; II) slightly increased (but with large fluctuations) PAH concentrations derived from intermittent warfare during the World War (1891-1945) and increased industrial activities after 1946 (1946-1965); III) a period of stagnation and, in some cases, reduction in PAHs during the \"Cultural Revolution\" (1966 to 1979); and IV) a rapid and persistent rise in PAHs post 1979 linked to fast economic development, with PAH concentrations doubled from 1979 to 2014. Changes in PAH distributions demonstrate major shifts in the dominant types of fuels over time from vegetation/wood, to coal and wood, followed by coal and petroleum (including vehicle emissions) over the past 200 years. We find that PAH records also show similar trend to domestic economy and the estimated regional Anthropocene CO2 emissions from industrial activities, suggesting sedimentary PAH fluxes could be used as an indirect and qualitative proxy to track the trend for regional anthropogenic CO2 emissions.