IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Importance of active layer freeze-thaw cycles on the riverine dissolved carbon export on the Qinghai-Tibet Plateau permafrost region
Song, Chunlin1,2; Wang, Genxu1; Mao, Tianxu3; Chen, Xiaopeng4; Huang, Kewei1,2; Sun, Xiangyang1; Hu, Zhaoyong1
Corresponding AuthorWang, Genxu(wanggx@imde.ac.cn)
2019-06-17
Source PublicationPEERJ
ISSN2167-8359
Volume7Pages:25
AbstractThe Qinghai-Tibet Plateau (QTP) is experiencing severe permafrost degradation, which can affect the hydrological and biogeochemical processes. Yet how the permafrost change affects riverine carbon export remains uncertain. Here, we investigated the seasonal variations of dissolved inorganic and organic carbon (DIC and DOC) during flow seasons in a watershed located in the central QTP permafrost region. The results showed that riverine DIC concentrations (27.81 +/- 9.75 mg L-1) were much higher than DOC concentrations (6.57 +/- 2.24 mg L-1). DIC and DOC fluxes were 3.95 and 0.94 g C m(-2) year(-1), respectively. DIC concentrations increased from initial thaw (May) to freeze period (October), while DOC concentrations remained relatively steady. Daily dissolved carbon concentrations were more closely correlated with baseflow than that with total runoff. Spatially, average DIC and DOC concentrations were positively correlated with vegetation coverage but negatively correlated with bare land coverage. DIC concentrations increased with the thawed and frozen depths due to increased soil interflow, more thaw-released carbon, more groundwater contribution, and possibly more carbonate weathering by soil CO2 formed carbonic acid. The DIC and DOC fluxes increased with thawed depth and decreased with frozen layer thickness. The seasonality of riverine dissolved carbon export was highly dependent on active layer thawing and freezing processes, which highlights the importance of changing permafrost for riverine carbon export. Future warming in the QTP permafrost region may alter the quantity and mechanisms of riverine carbon export.
KeywordDIC DOC Riverine carbon Biogeochemistry Qinghai-Tibet Plateau permafrost Active layer
DOI10.7717/peerj.7146
Indexed BySCI
WOS KeywordSOIL ORGANIC-CARBON ; CLIMATE-CHANGE ; SEASONAL VARIABILITY ; FLUXES ; TRANSPORT ; CATCHMENT ; NITROGEN ; WATER ; BIODEGRADABILITY ; BIOAVAILABILITY
Language英语
Funding ProjectMajor Research Plan of the National Natural Science Foundation of China[91547203] ; National Natural Science Foundation of China[41890821] ; National Natural Science Foundation of China[41701037] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20050102] ; China Scholarship Council
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000471756800016
Funding OrganizationMajor Research Plan of the National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; China Scholarship Council
PublisherPEERJ INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26502
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Genxu
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Guizhou Univ, Guiyang, Guizhou, Peoples R China
4.Shanxi Agr Univ, Jinzhong, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Song, Chunlin,Wang, Genxu,Mao, Tianxu,et al. Importance of active layer freeze-thaw cycles on the riverine dissolved carbon export on the Qinghai-Tibet Plateau permafrost region[J]. PEERJ,2019,7:25.
APA Song, Chunlin.,Wang, Genxu.,Mao, Tianxu.,Chen, Xiaopeng.,Huang, Kewei.,...&Hu, Zhaoyong.(2019).Importance of active layer freeze-thaw cycles on the riverine dissolved carbon export on the Qinghai-Tibet Plateau permafrost region.PEERJ,7,25.
MLA Song, Chunlin,et al."Importance of active layer freeze-thaw cycles on the riverine dissolved carbon export on the Qinghai-Tibet Plateau permafrost region".PEERJ 7(2019):25.
Files in This Item:
File Name/Size DocType Version Access License
peerj-7146.pdf(8332KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Song, Chunlin]'s Articles
[Wang, Genxu]'s Articles
[Mao, Tianxu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Song, Chunlin]'s Articles
[Wang, Genxu]'s Articles
[Mao, Tianxu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Song, Chunlin]'s Articles
[Wang, Genxu]'s Articles
[Mao, Tianxu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: peerj-7146.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.