AnthropogenicBlack Carbon Signatures in AntarcticFjords: Implications for Carbon Cycling

南極フィヨルドにおける人為起源ブラックカーボンの特徴: 炭素循環への影響 (AI 翻訳)

Jun‐Oh Min, Boyeon Lee, Chorom Shim, Young Wook Ko, Seunghee Kim, Sujin Kang, Jisoo Park (475945), Sun-Yong Ha (8948501)

Figshare📚 査読済 / ジャーナル2026-06-20#気候科学

DOI: 10.1021/acs.est.6c05186.s001

原典: https://figshare.com/articles/journal_contribution/Anthropogenic_Black_Carbon_Signatures_in_Antarctic_Fjords_Implications_for_Carbon_Cycling/32748044

🤖 gxceed AI 要約

日本語

南極フィヨルドにおけるブラックカーボン（BC）の動態を調査。溶解BC濃度や分子特性から、人為起源の化石燃料由来BCが増加していることを示し、2023年には16%に達した。堆積物中のBCは効率的に保存され、炭素循環におけるBCの重要性を強調。

English

This study investigates black carbon (BC) dynamics in Antarctic fjords, finding that dissolved BC is largely anthropogenic from fossil fuels, with contributions doubling from 6% in 2019 to 16% in 2023 due to increased tourism and research. Sedimentary BC shows preferential preservation, highlighting the role of Antarctic fjords in sequestering anthropogenic BC and the need to include BC in polar carbon budgets.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

この研究は、南極の観光活動や研究活動がブラックカーボンの堆積に与える影響を定量的に示しており、日本の南極観測や環境影響評価にも示唆を与える。

In the global GX context

This paper provides quantitative evidence of anthropogenic black carbon from local activities in Antarctic fjords, which is relevant for global carbon cycle models and for understanding the impact of tourism on polar ecosystems.

👥 読者別の含意

🔬研究者:This paper provides new data on black carbon dynamics in polar fjords, crucial for improving carbon cycle models and understanding anthropogenic impacts in remote areas.

🏛政策担当者:Relevant for environmental impact assessments of polar tourism and research activities.

📄 Abstract（原文）

Black carbon (BC) dynamics in polar fjords remain poorly understood despite their importance in organic carbon (OC) cycling. We investigated BC dynamics in the water column and sediments of Antarctic fjords. Dissolved BC concentrations in Marian Cove and Maxwell Bay ranged from 0.10–2.71 and 0.70–2.70 μM, respectively, with molecular characteristics indicating highly condensed, locally anthropogenic BC rather than photochemically aged biomass-burning sources. Bayesian mixing model analyses showed that fossil-fuel-derived BC increased 2.7-fold, from 6% in 2019 to 16% in 2023, reflecting intensified tourism and research activities following COVID-19-related restrictions. Sedimentary BC (73–85% C3-derived) suggests local combustion sources, although minor contributions from natural biomass burning cannot be excluded. In contrast, Arctic Kongsfjorden sediments showed 53% C4 contribution, indicating long-range wildfire BC transport. Marian Cove sediment traps yielded a BC flux of 0.04 g m–2 d–1 (22% of OC flux). Higher apparent burial efficiency of BC (89–114%) relative to OC (75–95%), together with elevated Δ(SBC:OC) values (1.20) and millennial-scale radiocarbon ages (4700–5120 yr), indicate preferential BC preservation. These findings show that Antarctic fjords effectively sequester anthropogenic BC and highlight the importance of incorporating BC dynamics into polar coastal carbon budgets.

🔗 Provenance — このレコードを発見したソース

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