中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
DOI10.1002/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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