In‐Lake GHG Production Constrained by Lake DOM Mass Balance in a Boreal Catchment
北方集水域における湖沼DOM収支に制約された湖内温室効果ガス生成 (AI 翻訳)
Xiang Lu, Francois Clayer, Peter Dörsch, Dag Olav Hessen, Uta Brandt, Mats Rouven Ippach, Alexander Michael Delver, Heleen A. de Wit
🤖 gxceed AI 要約
日本語
本研究は、ノルウェーの北方湖沼Langtjernにおける溶存有機炭素（DOC）、CO2、CH4の高密度モニタリングデータを用いて、有機・無機炭素収支を構築した。湖は温室効果ガスのホットスポットであり、大気へのCO2およびCH4放出量はそれぞれ1.50、0.012 g C m-2 catchment yr-1と推定された。湖内の無機化速度とCH4生成速度は水温と正の相関を示し、湿潤な気候が温暖化よりも湖のGHG生成に強く影響することが示唆された。
English
This study constructed an organic and inorganic carbon budget for the boreal humic headwater lake Langtjern (Norway) using dense monitoring of DOC, CO2, and CH4. The lake was a GHG hotspot, with atmospheric evasion of CO2 and CH4 estimated at 1.50 and 0.012 g C m-2 catchment yr-1, respectively. Mineralization rates derived from inorganic and organic mass balances agreed and were positively correlated with water temperature. A wetter climate is expected to exert stronger control on boreal lake GHG production than warming.
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
本論文は北方湖沼の自然由来GHG排出メカニズムを解明するもので、日本の自然炭素循環評価に参考となるが、GX政策や企業開示には直接的には関連しない。
In the global GX context
This paper provides empirical evidence on lake GHG production constrained by DOM mass balance, relevant for understanding natural carbon cycle feedbacks in a changing climate. It adds to the knowledge base for national GHG inventories and natural climate solutions.
👥 読者別の含意
🔬研究者:This offers a detailed carbon budget approach for boreal lakes, useful for biogeochemists studying aquatic GHG fluxes.
🏛政策担当者:May inform considerations of natural emissions in climate policy, but not directly actionable.
📄 Abstract（原文）
Abstract The processing of organic carbon in surface waters represents a critical component of the carbon (C) cycle in boreal landscapes and is closely linked to greenhouse gas (GHG) emissions, primarily carbon dioxide (CO 2 ) and methane (CH 4 ). Utilizing a unique data set with dense monitoring of dissolved organic carbon (DOC), dissolved CO 2 , and CH 4 at the inlets and outlet of the boreal humic headwater lake Langtjern (Norway), we constructed an organic and inorganic C budget for the wet year 2023. Catchment inputs of DOC (14.7 g C m −2 yr −1 ) exceeded lake export (12.4 g C m −2 yr −1 ), whereas CO 2 (in: 0.9, out: 1.2 g C m −2 yr −1 ) and CH 4 (in: 0.001, out: 0.008 g C m −2 yr −1 ) exhibited the opposite pattern. The atmospheric evasion of CO 2 and CH 4 were 1.50 and 0.012 g C m −2 _catchment yr −1 , respectively, demonstrating that the lake was a hotspot of GHGs. Estimated mineralization rates derived from inorganic (1.80 ± 0.83 g C m −2 _catchment yr −1 ) and organic C (1.30 ± 0.43 g C m −2 _catchment yr −1 ) mass balances were in reasonable agreement, and their main uncertainties came from catchment inputs and lake evasion. Lake dissolved organic matter mineralization and CH 4 production rates were positively correlated with water temperature. Catchment C inputs were strongly dependent on precipitation while DOC removal was limited by water residence time. We expect that a wetter climate will exert a stronger future control on boreal lake GHG production than warming by reducing aquatic processing time.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1029/2025wr041297first seen 2026-05-14 23:56:32
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