内陆水域的碳排放量可能被低估了:因干旱而支离破碎的欧洲河网提供的证据

IF 5.1 2区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Letters Pub Date : 2024-07-04 DOI:10.1002/lol2.10408
Naiara López-Rojo, Thibault Datry, Francisco J. Peñas, Gabriel Singer, Nicolas Lamouroux, José Barquín, Amaia A. Rodeles, Teresa Silverthorn, Romain Sarremejane, Rubén del Campo, Edurne Estévez, Louise Mimeau, Frédéric Boyer, Annika Künne, Martin Dalvai Ragnoli, Arnaud Foulquier
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引用次数: 0

摘要

河网对全球碳循环的贡献不成比例。然而,全球对内陆水域碳排放量的估算是基于常年河流,尽管全球一半以上的河流长度都容易干涸。我们量化了欧洲六个干涸河网(DRNs,120 个河段)和三个季节中流水和干涸河床的二氧化碳和甲烷排放量,并利用当地和区域变量确定了排放的驱动因素。流水排放的驱动因素在多年生和非多年生河段之间存在差异,二氧化碳和甲烷排放在一定程度上受年度干旱严重程度的控制,反映了干旱遗留效应。对六个干旱区域网的二氧化碳排放量进行年度放大后发现,干涸河床的排放量占年度排放量的 77%,因此迫切需要将非多年生河流纳入全球温室气体排放量估算中。
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Carbon emissions from inland waters may be underestimated: Evidence from European river networks fragmented by drying

River networks contribute disproportionately to the global carbon cycle. However, global estimates of carbon emissions from inland waters are based on perennial rivers, even though more than half of the world's river length is prone to drying. We quantified CO2 and CH4 emissions from flowing water and dry riverbeds across six European drying river networks (DRNs, 120 reaches) and three seasons and identified drivers of emissions using local and regional variables. Drivers of emissions from flowing water differed between perennial and non-perennial reaches, both CO2 and CH4 emissions were controlled partly by the annual drying severity, reflecting a drying legacy effect. Upscaled CO2 emissions for the six DRNs at the annual scale revealed that dry riverbeds contributed up to 77% of the annual emissions, calling for an urgent need to include non-perennial rivers in global estimates of greenhouse gas emissions.

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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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