DOI: 10.1016/j.chemgeo.2019.119451
论文题名: Sulfur cycling in the Yellow River and the sulfate flux to the ocean
作者: Zhang D. ; Zhao Z.-Q. ; Peng Y. ; Fan B. ; Zhang L. ; Li J. ; Chen A.
刊名: Chemical Geology
ISSN: 92541
出版年: 2020
卷: 534 语种: 英语
英文关键词: Global sulfur cycle
; Loess Plateau
; Sulfate flux
; Sulfur and oxygen isotopes
; Yellow River
Scopus关键词: Arid regions
; Effluents
; Gypsum
; Isotopes
; Landforms
; Oceanography
; Reservoirs (water)
; Sediments
; Sulfur compounds
; Anthropogenic effects
; Chinese Loess Plateau
; Isotope compositions
; Loess Plateau
; Oxygen isotopes
; Qinghai Tibet plateau
; Sulfur cycles
; Yellow river
; Rivers
; anthropogenic source
; isotopic analysis
; isotopic composition
; oxygen isotope
; sulfur cycle
; sulfur isotope
; China
; Loess Plateau
; Yellow River
英文摘要: River sulfate flux is a major input into the ocean reservoir and plays a critical role in the global sulfur cycle. Constrained riverine sulfate isotope compositions are useful in gaining a better understanding of the secular changes in the sulfur isotopic value (δ34SSO4) of the ocean. The sulfate flux from rivers flowing through arid areas is often ignored due to their low water discharge, but these rivers generally contain large amounts of sulfate duo to water condensation, gypsum dissolution and anthropogenic effluents. Hence, their effects on the global sulfur cycle are still unclear. The Yellow River (YR) flows across the eastern Qinghai-Tibet Plateau (QTP) and arid Chinese Loess Plateau (CLP) with a length of 5464 km. As one typical large river flowing across arid climate areas coupled with extensive human activities in the world, the YR is an ideal site to illustrate this problem. The riverine sulfate sources in the different reaches of the YR were determined by δ34SSO4 and δ18OSO4 values, and sulfur cycling concept model in the Yellow River Basin (YRB) was established to explain the natural and anthropogenic effects on sulfate flux coupled with δ34SSO4 values from the YR to the ocean. Our data showed that gypsum-derived sulfate controls the δ34SSO4 of the YR and its contribution increased from 30% to 90% downstream with mean values of 71%, 84%, and 87% for the upstream, midstream, and downstream segments of the river, respectively. The annual sulfate flux to the ocean ranges from 0.026 Tmol/yr to 0.043 Tmol/yr with an average of 0.036 Tmol/yr in this century, and the average flux-weighted δ34SSO4 value was +8.5‰. Compared with the natural global riverine sulfate flux to the ocean, the YR contributes nearly 1.1% of the sulfate flux. This combined with its positive δ34SSO4 value makes this arid area an important contributor to the sulfate flux and the global sulfur cycle. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159228
Appears in Collections: 气候变化与战略
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作者单位: Institute of Resource and Environment, Henan Polytechnic University, Jiaozuo, 454000, China; School of Earth Science and Resources, Chang'an University, Xi'an, 710054, China; School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; International Center for Isotope Effect Research, Nanjing University, Nanjing, 210023, China; Guizhou Minzu University, Guiyang, 550002, China; School of Geography and Resource, Guizhou Education University, Guiyang, 550018, China
Recommended Citation:
Zhang D.,Zhao Z.-Q.,Peng Y.,et al. Sulfur cycling in the Yellow River and the sulfate flux to the ocean[J]. Chemical Geology,2020-01-01,534