Combustion-derived black carbon (BC) is an important component of sedimentary carbon pool. Due to different physicochemical properties, determining the source of char and soot is crucial for BC cycling, especially for nonhomologous char and soot in the Tibetan Plateau (TP). This study analyzed the sequestration and source of BC, char, and soot in the Dagze Co (inner TP) sediment core via the content and δ¹³C, revealing the biomass and fossil fuel driving on nonsynchronous char and soot and their response to local anthropogenic activities and atmospheric transmission. The results showed that BC concentration increased from 1.19 ± 0.35 mg g^–1 (pre-1956) to 2.03 ± 1.05 mg g^–1 (after 1956). The variation of char was similar to BC, while nonhomologous growth was detected in char and soot (r = 0.29 and p > 0.05). The source apportionment showed that biomass burning for 71.52 ± 10.23% of char and promoted char sequestration. The contribution of fossil fuel combustion to soot (46.67 ± 14.07%) is much higher than char (28.48 ± 10.23%). Redundancy analysis confirmed that local anthropogenic activities significantly influenced BC burial and atmospheric transport from outside TP-regulated BC burial. The contribution of biomass and fossil fuels to nonsynchronous char and soot is conducive to understanding the anthropogenic effect on BC burial in the TP.

中文翻译：

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基于青藏高原湖泊沉积物中稳定碳同位素的非同源黑碳解耦炭和烟尘封存

燃烧产生的黑碳（BC）是沉积碳库的重要组成部分。由于不同的物理化学性质，确定炭和烟灰的来源对于 BC 循环至关重要，特别是对于青藏高原 (TP) 的非同源炭和烟灰。^{本研究通过内容和 δ 13} C分析了 Dagze Co（内 TP）沉积岩心中 BC、炭和烟尘的封存和来源，揭示了驱动非同步炭和烟尘的生物质和化石燃料及其对当地人为活动的响应活动和大气传播。结果表明，BC 浓度从 1.19 ± 0.35 mg g ^–1（1956 年之前）增加到 2.03 ± 1.05 mg g ^–1（1956 年后）。char 的变化与 BC 相似，而在 char 和 soot 中检测到非同源生长（r = 0.29 和p > 0.05）。源解析表明，生物质燃烧产生了 71.52 ± 10.23% 的炭，促进了炭的固存。化石燃料燃烧对烟灰的贡献 (46.67 ± 14.07%) 远高于焦炭 (28.48 ± 10.23%)。冗余分析证实，当地的人为活动显着影响了 BC 埋藏和来自外部 TP 调节的 BC 埋藏的大气传输。生物质和化石燃料对非同步炭和烟尘的贡献有助于了解人为对青藏高原黑炭埋藏的影响。