Changes in hydrological regime regulate POC export across permafrost-dominated Arctic River basins
文献类型：期刊论文
| 作者 | Liu, Shiqi6; Wang, Ping2,6; Yu, Jingjie2,6; Zhou, Renjie5; Bai, Bing2,6; Gabysheva, Olga I.1; Frolova, Natalia L.4; Pozdniakov, Sergey P.3 |
| 刊名 | GEOSCIENCE FRONTIERS
 |
| 出版日期 | 2026 |
| 卷号 | 17期号:1页码:102208 |
| 关键词 | Particulate organic carbon Arctic rivers Permafrost degradation Climate change Hydrological regime |
| ISSN号 | 1674-9871 |
| DOI | 10.1016/j.gsf.2025.102208 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Warming-driven acceleration of hydrological processes is altering the carbon cycle in permafrost-dominated Arctic regions, yet the underlying drivers remain unclear. This study analyzes ArcticGRO data (2003-2021) from six major Arctic rivers (Ob, Yenisei, Lena, Kolyma, Yukon, and Mackenzie) to investigate trends and spatial-temporal variations in riverine particulate organic carbon (POC). The annual POC flux from these six rivers, estimated using the Load Estimator (LOADEST), averaged 2.78 Tg. Only the Lena River showed a notable annual decrease in POC flux (-3.9%/yr, p < 0.001) and concentration (-12%/yr, p < 0.001), while the Yukon River exhibited increasing streamflow (+0.98%/yr, p < 0.001) and POC flux (+3.2%/yr, p < 0.001). POC flux variations were primarily governed by streamflow and POC concentration, with higher concentrations in spring floods period and lower during winter. Spatial differences were linked to drainage density (Dd) and forest coverage (Fc). The Yukon River basin, with a higher Dd of 0.2 km/km(2) and lower Fc approximately 24%, exhibits the highest POC concentrations (2.3 mg/L). In contrast, the Yenisei River basin has the lowest POC concentration (similar to 0.4 mg/L), along with a relatively low drainage density (Dd = 0.18 km/km(2)) and a high forest cover (Fc = 67%). Permafrost conditions constrained riverine POC export, with isotopic evidence indicating a shift from a carbon sink to a source, as POC carbon age increased by similar to 200 to 1700 years (4%-68%) annually, peaking in winter (700-2500 years) after 2012. Rivers with lower permafrost coverage (e.g., Ob, Yenisei), exhibit higher winter POC fluxes contributions (10%-20%), while others contributed < 5%, suggesting the role of permafrost degradation in winter carbon export. This study emphasizes the need to assess climate-driven hydrological shifts and permafrost thaw in shaping Arctic land-to-ocean carbon fluxes. |
| URL标识 | 查看原文 |
| WOS关键词 | PARTICULATE ORGANIC-MATTER ; WESTERN SIBERIAN RIVERS ; RUSSIAN RIVERS ; CLIMATE-CHANGE ; SOIL-EROSION ; LENA RIVER ; CARBON ; OCEAN ; DELTA ; CYCLE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001619349300001 |
| 出版者 | CHINA UNIV GEOSCIENCES, BEIJING |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219772]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Wang, Ping |
| 作者单位 | 1.Russian Acad Sci, Inst Biol Problems Cryolithozone, Siberian Branch, Yakutsk 677980, Russia; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Lomonosov Moscow State Univ, Dept Hydrogeol, GSP-1, Leninskie Gory, Moscow 119899, Russia 4.Lomonosov Moscow State Univ, Dept Land Hydrol, GSP-1, Leninskie Gory, Moscow 119991, Russia; 5.Sam Houston State Univ, Dept Environm & Geosci, Huntsville, TX 77340 USA; 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, 11A Datun Rd, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liu, Shiqi,Wang, Ping,Yu, Jingjie,et al. Changes in hydrological regime regulate POC export across permafrost-dominated Arctic River basins[J]. GEOSCIENCE FRONTIERS,2026,17(1):102208. |
| APA | Liu, Shiqi.,Wang, Ping.,Yu, Jingjie.,Zhou, Renjie.,Bai, Bing.,...&Pozdniakov, Sergey P..(2026).Changes in hydrological regime regulate POC export across permafrost-dominated Arctic River basins.GEOSCIENCE FRONTIERS,17(1),102208. |
| MLA | Liu, Shiqi,et al."Changes in hydrological regime regulate POC export across permafrost-dominated Arctic River basins".GEOSCIENCE FRONTIERS 17.1(2026):102208. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。