Abstract Black carbon (BC), the byproduct of incomplete combustion of fossil fuels and biomass can be stored in soil for a long time and potentially archive changes in natural and human activities. Increasing amounts of BC has been produced from human activities during the past 150 years and has influenced global climate change and carbon cycle. Identifying historical BC sources is important in knowing how historical human activities influenced BC and BC transportation processes in the atmosphere. In this study, PAH components and δ13C-BC in peatland in the Sanjiang Plain were used for identifying and verifying regional BC sources during the last 150 years. Results showed that environment-unfriendly industry developed at the end of the 1950s produced a great amount of BC and contributed the most BC in this period. In other periods, however, BC in the Sanjiang Plain was mainly produced from incomplete biomass burning before the 1990s; particularly, slash-and-burn of pastures and forests during regional reclamation periods between the 1960s and 1980s produced a huge amount of biomass burning BC, which then deposited into the surrounding ecosystems. With the regional reclamation decreasing and environment-friendly industry developing, the proportion of BC emitted and deposited from transportation sources increased and transportation source became an important BC source in the Sanjiang Plain after the 1990s.

中文翻译：

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东北三江平原多环芳烃和δ 13 C确定的黑碳历史来源

摘要 黑碳 (BC) 是化石燃料和生物质不完全燃烧的副产品，可以在土壤中长期储存，并可能记录自然和人类活动的变化。在过去的 150 年中，人类活动产生了越来越多的 BC，并影响了全球气候变化和碳循环。识别历史 BC 来源对于了解历史人类活动如何影响大气中的 BC 和 BC 运输过程非常重要。本研究利用三江平原泥炭地多环芳烃成分和δ13C-BC来识别和验证过去150年来区域BC的来源。结果表明，1950年代末发展起来的环境不友好工业产生了大量的BC，并且在这一时期贡献了最多的BC。但在其他时期，三江平原的 BC 主要来源于 1990 年代之前不完全的生物质燃烧；特别是 1960 年代和 1980 年代之间的区域开垦期间对牧场和森林的刀耕火种产生了大量燃烧 BC 的生物质，然后沉积到周围的生态系统中。1990年代以后，随着区域围垦的减少和环境友好型产业的发展，运输源排放和沉积的碳排放比例增加，运输源成为三江平原的重要碳排放源。然后沉积到周围的生态系统中。1990年代以后，随着区域围垦的减少和环境友好型产业的发展，运输源排放和沉积的碳排放比例增加，运输源成为三江平原的重要碳排放源。然后沉积到周围的生态系统中。1990年代以后，随着区域围垦的减少和环境友好型产业的发展，运输源排放和沉积的碳排放比例增加，运输源成为三江平原的重要碳排放源。