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DOI | 10.1016/j.scitotenv.2019.05.478 |
Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau | |
Gao, Tanguang; Kang, Shichang; Chen, Rensheng; Zhang, Taigang; Zhang, Tingjun; Han, Chuntan; Tripathee, Lekhendra; Sillanpaa, Mika; Zhang, Yulan | |
发表日期 | 2019 |
ISSN | 0048-9697 |
EISSN | 1879-1026 |
卷号 | 686 |
英文摘要 | Riverine dissolved organic carbon (DOC) and its optical properties were investigated in two sub-river basins (Yeniugou and Hulugou river) of the Upper Heihe river basin in the northern Tibetan Plateau. The results showed that DOC concentrations ranged from 025 to 12.2 and 0.18-1.04 mg L-1 for Yeniugou and Hulugou river basin with an average of 0.82 and 0.33 mg L-1, respectively. Export of DOC from the studied river (YNG: similar to 0.86 Gg C yr(-1)) was lesser compared with other large river in the Tibetan Plateau and Arctic regions because of the small drainage area and lower DOC concentrations. There exhibited significant seasonality for DOC in Yeniugou river basin with higher values observed during late spring and summer; however, no such distinct trend was observed for DOC in the studied rivers of Hulugou river basin. In contrast, total dissolved nitrogen showed a slightly lower value during the summer season. A strong relationship was determined between DOC concentrations and spectral UV absorbance at 254 nm (SUVA(254)), absorption coefficients and spectral slope for both sub-river basins, attributing that the riverine DOM in the northern Tibetan Plateau has a remarkably high content of aromatic compounds in late spring and summer. Considering the less snow cover percentage, this study highlights the potential impacts of permafrost thaw on the riverine DOC and its characteristics in the permafrost region under climate change. (C) 2019 Elsevier B.V. All rights reserved. |
关键词 | DOCRiver waterPermafrostAbsorbanceSpectral slopeTibetan Plateau |
学科领域 | Environmental Sciences & Ecology |
语种 | 英语 |
WOS研究方向 | Environmental Sciences |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT |
来源机构 | 中国科学院西北生态环境资源研究院 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/112016 |
作者单位 | Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou 730000, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Gao, Tanguang,Kang, Shichang,Chen, Rensheng,et al. Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2019,686. |
APA | Gao, Tanguang.,Kang, Shichang.,Chen, Rensheng.,Zhang, Taigang.,Zhang, Tingjun.,...&Zhang, Yulan.(2019).Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,686. |
MLA | Gao, Tanguang,et al."Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 686(2019). |
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