Cross continental increase in methane ebullition under climate change.
Cross continental increase in methane ebullition under climate change.
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DOI：
10.1038/s41467-017-01535-y
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发表时间：
2017-11-22
影响因子：
16.6
通讯作者：
Kosten S
中科院分区：
文献类型：
--
作者：
Aben RCH;Barros N;van Donk E;Frenken T;Hilt S;Kazanjian G;Lamers LPM;Peeters ETHM;Roelofs JGM;de Senerpont Domis LN;Stephan S;Velthuis M;Van de Waal DB;Wik M;Thornton BF;Wilkinson J;DelSontro T;Kosten S
甲烷（CH4）对观测到的全球变暖有很大贡献。由于天然CH4排放主要来自湿润生态系统，因此阐明气候变化如何影响这些排放非常重要。对于气泡（来自沉积物的气泡通量）来说尤其如此，这是一种长期被低估的途径，但通常在排放中占主导地位。在这里，我们利用文献中的多季节CH4沸腾数据，在不同大陆的广泛淡水生态系统中，CH4沸腾与温度之间存在非常强的关系。由于这些温度-沸腾关系可能受到有机质有效性的季节变化的影响，我们还进行了全年控制的中生态实验。4°C升温导致年CH4沸腾总量增加51%，但扩散不受影响。我们的综合研究结果表明，全球变暖将通过气泡的不成比例增加（每增加1°C增加6-20%）强烈增加淡水CH4排放，从而促进全球变暖。气候变化对通过气泡产生的天然甲烷（CH4）排放的影响尚不清楚。在这里，利用已发表的和实验的多季节CH4沸腾数据，作者发现全球范围内广泛的淡水生态系统中CH4沸腾与温度之间存在很强的关系。
Methane (CH4) strongly contributes to observed global warming. As natural CH4 emissions mainly originate from wet ecosystems, it is important to unravel how climate change may affect these emissions. This is especially true for ebullition (bubble flux from sediments), a pathway that has long been underestimated but generally dominates emissions. Here we show a remarkably strong relationship between CH4 ebullition and temperature across a wide range of freshwater ecosystems on different continents using multi-seasonal CH4 ebullition data from the literature. As these temperature–ebullition relationships may have been affected by seasonal variation in organic matter availability, we also conducted a controlled year-round mesocosm experiment. Here 4 °C warming led to 51% higher total annual CH4 ebullition, while diffusion was not affected. Our combined findings suggest that global warming will strongly enhance freshwater CH4 emissions through a disproportional increase in ebullition (6–20% per 1 °C increase), contributing to global warming. The impacts of climate change on natural methane (CH4) emissions via ebullition are unclear. Here, using published and experimental multi-seasonal CH4 ebullition data, the authors find a strong relationship between CH4 ebullition and temperature across a wide range of freshwater ecosystems globally.
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影响因子：
11.6
作者：
Frenken, Thijs;Velthuis, Mandy;Van de Waal, Dedmer B.
通讯作者：
Van de Waal, Dedmer B.
影响因子：
3.7
作者：
Fuchs, Andrea;Lyautey, Emilie;Casper, Peter
通讯作者：
Casper, Peter
影响因子：
0.9
作者：
Joyce, J;Jewell, PW
通讯作者：
Jewell, PW
影响因子：
3.7
作者：
Liu, L.;Wilkinson, J.;Lorke, A.
通讯作者：
Lorke, A.
影响因子：
10.1
作者：
Deemer, Bridget R.;Harrison, John A.;Vonk, J. Arie
通讯作者：
Vonk, J. Arie