Global patterns of particulate organic carbon export from land to the ocean
文献类型：期刊论文
| 作者 | Li, Mingxu2; Peng, Changhui1,3; He, Nianpeng2 |
| 刊名 | ECOHYDROLOGY
 |
| 出版日期 | 2021-11-05 |
| 页码 | 12 |
| 关键词 | climate change dam trapping global rivers particulate organic carbon process-based model |
| ISSN号 | 1936-0584 |
| DOI | 10.1002/eco.2373 |
| 通讯作者 | Li, Mingxu(mingxuli@igsnrr.ac.cn) ; Peng, Changhui(peng.changhui@uqam.ca) |
| 英文摘要 | Global rivers and streams are important carbon transport pathways from land to the ocean. However, few studies have quantified terrigenous carbon dynamics in river ecosystems and its variations due to climate change and anthropogenic perturbations. Therefore, our study analysed fluvial particulate organic carbon (POC) and developed a processed-based model (TRIPLEX-HYDRA) to simulate the production, transport and removal (i.e., deposition, degradation and dam retention) processes of fluvial POC along the land-ocean aquatic continuum (LOAC). Based on our results, approximately 0.29 Pg of POC is exported from land to the ocean through rivers each year. More specifically, we found that rivers at low latitudes (30 degrees S-30 degrees N, 0.18 Pg yr(-1)) and high northern latitudes (60 degrees N-90 degrees N, 0.05 Pg yr(-1)) had higher POC fluxes compared to rivers in other regions. This high POC flux is related to strong erosion rates and high soil organic carbon storage. Additionally, our model simulation revealed that total POC flux from global river has not significantly changed from 1983 to 2015 but displays markedly decreased or increased trend at regional scale. These regional variations in POC export are affected by climate warming and dam construction. Moreover, approximately 0.46 Pg of POC is deposited or trapped by dams along the LOAC system, which plays a vital role in the global river carbon budget. Although some limitations and uncertainties remain, this study establishes a theoretical and methodological basis for quantifying riverine POC dynamics in the LOAC system. |
| WOS关键词 | SOIL-EROSION ; COASTAL OCEAN ; FLUXES ; SEDIMENT ; IMPACT ; MODEL ; RETENTION ; EMISSIONS ; TRANSPORT ; DYNAMICS |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK060602] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000714677300001 |
| 出版者 | WILEY |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167461]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Mingxu; Peng, Changhui |
| 作者单位 | 1.Hunan Normal Univ, Coll Resources & Environm Sci, Changsha, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Quebec Montreal, Inst Environm Sci, Dept Biol Sci, CP 8888,Succ Ctr Ville, Montreal, PQ H3C 3P8, Canada |
| 推荐引用方式 GB/T 7714 | Li, Mingxu,Peng, Changhui,He, Nianpeng. Global patterns of particulate organic carbon export from land to the ocean[J]. ECOHYDROLOGY,2021:12. |
| APA | Li, Mingxu,Peng, Changhui,&He, Nianpeng.(2021).Global patterns of particulate organic carbon export from land to the ocean.ECOHYDROLOGY,12. |
| MLA | Li, Mingxu,et al."Global patterns of particulate organic carbon export from land to the ocean".ECOHYDROLOGY (2021):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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