Title | Groundwater Plays an Important Role in Controlling Riverine Dissolved Organic Matter in a Cold Alpine Catchment, the Qinghai-Tibet Plateau |
Author | |
Corresponding Author | Ma, Rui |
Publication Years | 2023-02
|
DOI | |
Source Title | |
ISSN | 0043-1397
|
EISSN | 1944-7973
|
Volume | 59Issue:2 |
Abstract | In cold alpine areas, the hydrological control on dissolved organic matter (DOM) export in relation to permafrost distribution remains uncertain on a catchment scale. To address this, the seasonal variations in DOM chemical features of groundwater and stream water were examined from 2013 to 2019 in a representative catchment on the northeastern Qinghai–Tibet Plateau, which is covered by both permafrost (at elevations higher than 3,500 m a.s.l.) and seasonally frozen areas. The results show that the highest dissolved organic carbon (DOC) concentration occurred during the thawing period (April–May), while the highest DOC flux occurred during the thawed period (June–early October). In the permafrost area, the freeze–thaw process significantly influenced the groundwater flow paths and DOM. During the thawing period, with shallow groundwater flow path through the organic soil layer, the stream water DOM recharged by suprapermafrost groundwater was characterized by high aromaticity and high DOC concentrations. During the thawed period, the deepening groundwater flow path through the mineral layer and dilution by overland flow, resulted in low DOC concentrations and DOM with lower aromaticity in stream water. When groundwater flowed from the permafrost area into the porous aquifers in the seasonally frozen area, the groundwater flow path also affected DOM dynamics. The stream water at the catchment outlet, which received groundwater discharge from the porous aquifer, showed a lower peak DOC concentration, a higher proportion of protein-like DOM, and a higher contribution of cold season DOC flux to annual DOC flux when compared to the water flowing out from the permafrost area. Our work highlights the role of the thick, porous aquifer in the seasonally frozen area in regulating DOM export. The results suggest that the cold alpine area may exhibit a stronger positive feedback to climate warming than that in Arctic areas. © 2023. American Geophysical Union. All Rights Reserved. |
Keywords | |
URL | [Source Record] |
Indexed By | |
Language | English
|
SUSTech Authorship | Others
|
Funding Project | This research was financially supported by the National Natural Science Foundation of China (NSFC‐41772270), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA20100103), and the 111 Program (State Administration of Foreign Experts Affairs and the Ministry of Education of China, Grant B18049).
|
WOS Research Area | Environmental Sciences & Ecology
; Marine & Freshwater Biology
; Water Resources
|
WOS Subject | Environmental Sciences
; Limnology
; Water Resources
|
WOS Accession No | WOS:000949529900014
|
Publisher | |
EI Accession Number | 20230913647545
|
EI Keywords | Aquifers
; Biogeochemistry
; Catchments
; Dissolution
; Feedback
; Groundwater resources
; Hydrogeology
; Organic carbon
; Permafrost
; Rivers
; Runoff
; Stream flow
; Thawing
|
ESI Classification Code | Waterways:407.2
; Flood Control:442.1
; Surface Water:444.1
; Groundwater:444.2
; Geology:481.1
; Geochemistry:481.2
; Fluid Flow, General:631.1
; Control Systems:731.1
; Biochemistry:801.2
; Chemical Operations:802.3
; Organic Compounds:804.1
|
ESI Research Field | ENVIRONMENT/ECOLOGY
|
Data Source | EV Compendex
|
Citation statistics |
Cited Times [WOS]:0
|
Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/519736 |
Department | School of Environmental Science and Engineering |
Affiliation | 1.School of Environmental Studies, China University of Geosciences, Wuhan, China 2.Hubei Key Laboratory of Yangtze River Basin Environmental Aquatic Science, China University of Geosciences, Wuhan, China 3.Now at School of Environmental Studies, China University of Geosciences, Wuhan, China 4.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China |
Recommended Citation GB/T 7714 |
Hu, Yalu,Ma, Rui,Sun, Ziyong,et al. Groundwater Plays an Important Role in Controlling Riverine Dissolved Organic Matter in a Cold Alpine Catchment, the Qinghai-Tibet Plateau[J]. WATER RESOURCES RESEARCH,2023,59(2).
|
APA |
Hu, Yalu,Ma, Rui,Sun, Ziyong,Zheng, Yan,Pan, Zhao,&Zhao, Lusong.(2023).Groundwater Plays an Important Role in Controlling Riverine Dissolved Organic Matter in a Cold Alpine Catchment, the Qinghai–Tibet Plateau.WATER RESOURCES RESEARCH,59(2).
|
MLA |
Hu, Yalu,et al."Groundwater Plays an Important Role in Controlling Riverine Dissolved Organic Matter in a Cold Alpine Catchment, the Qinghai–Tibet Plateau".WATER RESOURCES RESEARCH 59.2(2023).
|
Files in This Item: | There are no files associated with this item. |
|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment