Increased nitrous oxide emissions from global lakes and reservoirs since the pre-industrial era.
Increased nitrous oxide emissions from global lakes and reservoirs since the pre-industrial era.
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DOI：
10.1038/s41467-024-45061-0
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发表时间：
2024-01-31
影响因子：
16.6
通讯作者：
Pan, Shufen
中科院分区：
文献类型：
--
作者：
Li, Ya;Tian, Hanqin;Yao, Yuanzhi;Shi, Hao;Bian, Zihao;Shi, Yu;Wang, Siyuan;Maavara, Taylor;Lauerwald, Ronny;Pan, Shufen
Lentic系统（湖泊和水库）是一氧化二氮（N2 O）的排放热点，这是一种强大的温室气体;然而，这还没有得到很好的量化。在这里，我们研究了多种环境强迫如何影响自前工业化时期以来全球缓慢系统的N2 O排放。我们的研究结果表明，2010年代全球透镜体系统每年排放64.6 ± 12.1千兆克N2 O-N，自19世纪50年代以来增加了126%。由于小透镜体系统的显著排放率和对陆地环境变化的响应，其在减缓N2 O排放方面的重要性得到了强调。结合河流排放量，这项研究表明，2010年代全球内陆沃茨的N2 O排放量为319.6 ± 58.2千兆克N/年。这表明内陆水域N2 O排放相对于农业氮肥施用的全球排放系数为0.051%，并为改进国家温室气体排放清单的方法提供了国家一级的排放系数（从0到0.341%不等）。模拟表明，全球湖泊和水库的N2 O排放量比前工业时代增加了一倍，这主要是由于农业氮肥的广泛应用。
Lentic systems (lakes and reservoirs) are emission hotpots of nitrous oxide (N2O), a potent greenhouse gas; however, this has not been well quantified yet. Here we examine how multiple environmental forcings have affected N2O emissions from global lentic systems since the pre-industrial period. Our results show that global lentic systems emitted 64.6 ± 12.1 Gg N2O-N yr−1 in the 2010s, increased by 126% since the 1850s. The significance of small lentic systems on mitigating N2O emissions is highlighted due to their substantial emission rates and response to terrestrial environmental changes. Incorporated with riverine emissions, this study indicates that N2O emissions from global inland waters in the 2010s was 319.6 ± 58.2 Gg N yr−1. This suggests a global emission factor of 0.051% for inland water N2O emissions relative to agricultural nitrogen applications and provides the country-level emission factors (ranging from 0 to 0.341%) for improving the methodology for national greenhouse gas emission inventories. Modeling shows that N2O emissions from global lakes and reservoirs have doubled since the pre-industrial era, this was mainly caused by widespread agricultural nitrogen application.
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