Significant contribution of petrogenic organic carbon to suspended particulate organic carbon in the Beaufort Sea
ボーフォート海における懸濁粒子状有機炭素に対する石油由来有機炭素の重要な寄与 (AI 翻訳)
Dahae Kim, Jung‐Hyun Kim, Sujin Kang, Yeon‐Sik Bong, Kyung‐Hoon Shin
🤖 gxceed AI 要約
日本語
本研究は、カナダのボーフォート海マッケンジー海溝において、懸濁粒子状有機炭素の起源を調査した。二重同位体分析（Δ14C、δ13C）と分子バイオマーカー（リグニンフェノール）を組み合わせ、モンテカルロ混合モデルを用いて、石油由来有機炭素が懸濁粒子中有機炭素の11%～53%を占めることを明らかにした。この結果は、古代の難分解性炭素が北極海表層水に存在し、陸棚炭素動態に積極的に関与していることを示す。
English
This study investigated sources of particulate organic carbon in the Mackenzie Trough of the Canadian Beaufort Sea using dual-isotope analysis and molecular biomarkers. Applying a Monte Carlo mixing model, they found that petrogenic organic carbon contributes 11%-53% of suspended particulate organic carbon, highlighting the active role of ancient, refractory carbon in Arctic shelf carbon dynamics.
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
本論文は北極域の炭素循環に関する基礎的知見を提供するが、日本のGX政策やSSBJ等の開示基準との直接的な関連は薄い。ただし、気候変動フィードバックの理解に資するため、日本の研究者や政策担当者にとって参考情報となり得る。
In the global GX context
This paper provides fundamental insights into Arctic carbon cycling, relevant to global climate change assessments. While not directly linked to corporate disclosure frameworks like TCFD or ISSB, it contributes to understanding permafrost carbon feedbacks, which is important for climate risk models and policy.
👥 読者別の含意
🔬研究者:Provides direct evidence of petrogenic organic carbon in Arctic surface waters, offering valuable data for carbon cycle models and permafrost feedback studies.
🏛政策担当者:Highlights the need to include petrogenic carbon in assessments of terrestrial carbon mobilization under climate change, informing IPCC and Arctic policy.
📄 Abstract（原文）
Abstract Remobilized terrestrial organic carbon from permafrost‐affected landscapes is increasingly recognized as a key component of Arctic carbon cycling. In this study, we investigated the sources of particulate organic carbon in the surface mixed layers across the Mackenzie Trough by combining dual‐isotope analyses (Δ 14 C org , δ 13 C org ) with molecular biomarkers (lignin phenols). Building on previous sediment‐based source apportionment approaches, we assessed their applicability to suspended particulate matter collected along a shelf‐to‐slope transect in the Canadian Beaufort Sea. To address uncertainties in end‐member composition, we implemented a Monte Carlo‐based mixing model that integrates multiple geochemical tracers, including Δ 14 C org , δ 13 C org , 3,5‐dihydroxybenzoic acid to vanillyl phenols (3,5‐Bd/V) ratio, and lignin phenol concentrations. Our results showed that petrogenic organic carbon contributed substantially, ranging from 11% to 53%, to particulate organic carbon in both the upper and lower polar mixed layers. These findings provide direct evidence for the presence of petrogenic organic carbon in Arctic surface waters and highlight its active role in shelf carbon dynamics. The persistence of this ancient, refractory carbon pool in suspension emphasizes the need to include petrogenic organic carbon in assessments of terrestrial carbon mobilization, transformation, and burial in a rapidly warming Arctic.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/lno.70455first seen 2026-07-26 05:26:02
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