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Chemical weathering rates and controlling mechanisms of glacial catchments within different climate regimes in the Tibetan Plateau

文献类型：期刊论文

作者Guo, Xiao; Zhao, Zimiao; Liu, Wenjing; Sun, Huiguo; Xu, Zhifang1
刊名PEERJ COMPUTER SCIENCE
出版日期2023-07-05
卷号11页码:29
关键词River chemistry Yarlung Tsangpo river basin Glacial catchment Chemical weather-ing Monte Carlo inversion model
DOI10.7717/peerj.15594
英文摘要Background. Continental weathering plays an important role in regulating atmo-spheric CO2 levels. Chemical weathering in glacial areas has become an intensely focused topic in the background of global change compared with other terrestrial weathering systems. However, research on the weathering of the glacial areas in the Yarlung Tsangpo River Basin (YTRB) is still limited. Methods. In this article, the major ions of the Chaiqu and Niangqu catchments in the YTRB have been investigated to illustrate the chemical weathering rates and mechanisms of the glacier areas in the YTRB.Results. Ca2+ and HCO-3 dominate the major ions of the Chaiqu and Niangqu rivers, accounting for about 71.3% and 69.2% of the TZ+ of the Chaiqu (the total cations, TZ+ = Na+ + K+ + Ca2+ + Mg2+, in & mu;eq/L), and about 64.2% and 62.6% of the TZ+ of the Niangqu. A Monte Carlo model with six end-members is applied to quantitatively partition the dissolved load sources of the catchments. The results show that the dissolved loads of the Chaiqu and Niangqu rivers are mainly derived from carbonate weathering (accounting for about 62.9% and 79.7% of the TZ+, respectively), followed by silicate weathering (about 25.8% and 7.9% of the TZ+, respectively). The contributions of precipitation and evaporite to the Chaiqu rivers are about 5.0% and 6.2%, and those to the Niangqu rivers are about 6.3% and 6.2%. The model also calculated the proportion of sulfuric acid weathering in the Chaiqu and Niangqu catchments, which account for about 21.1% and 32.3% of the TZ+, respectively. Based on the results calculated by the model, the carbonate and silicate weathering rates in the Chaiqu catchment are about 7.9 and 1.8 ton km-2 a-1, and in the Niangqu catchment, the rates are about 13.7 and 1.5 ton km-2 a-1. The associated CO2 consumption in the Chaiqu catchment is about 4.3 and 4.4 x 104 mol km-2 a-1, and about 4.3 and 1.3 x 104 mol km-2 a-1 in the Niangqu catchment. The chemical weathering rates of the glacier areas in the YTRB show an increasing trend from upstream to downstream. Studying the weathering rates of glacier catchments in the Tibetan Plateau (TP) reveals that the chemical weathering rates of the temperate glacier catchments are higher than those of the cold glacier catchments and that lithology and runoff are important factors in controlling the chemical weathering of glacier catchments in the TP. The chemical weathering mechanisms of glacier areas in the YTRB were explored through statistical methods, and we found that elevation-dependent climate is the primary control. Lithology and glacial landforms rank second and third, respectively. Our results suggest that, above a certain altitude, climate change caused by tectonic uplift may inhibit chemical weathering. There is a more complex interaction between tectonic uplift, climate, and chemical weathering.
WOS关键词SEASONAL-VARIATION ; HIMALAYAN GLACIER ; CO2 CONSUMPTION ; ATMOSPHERIC CO2 ; CHEMISTRY ; RIVER ; HYDROCHEMISTRY ; PRECIPITATION ; BRAHMAPUTRA ; DENUDATION
资助项目National Key Research and Development Program of China[2020YFA0607700] ; National Natural Science Foundation of China[41730857] ; National Natural Science Foundation of China[42273050] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Key Research Program of the Institute of Geology amp; Geophysics, CAS[IGGCAS-202204] ; Youth Innovation Promotion Association CAS[2019067]
WOS研究方向Computer Science
语种英语
出版者PEERJ INC
WOS记录号WOS:001026323100003
资助机构National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/111302]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Xu, Zhifang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Xiao,Zhao, Zimiao,Liu, Wenjing,et al. Chemical weathering rates and controlling mechanisms of glacial catchments within different climate regimes in the Tibetan Plateau[J]. PEERJ COMPUTER SCIENCE,2023,11:29.
APA Guo, Xiao,Zhao, Zimiao,Liu, Wenjing,Sun, Huiguo,&Xu, Zhifang.(2023).Chemical weathering rates and controlling mechanisms of glacial catchments within different climate regimes in the Tibetan Plateau.PEERJ COMPUTER SCIENCE,11,29.
MLA Guo, Xiao,et al."Chemical weathering rates and controlling mechanisms of glacial catchments within different climate regimes in the Tibetan Plateau".PEERJ COMPUTER SCIENCE 11(2023):29.

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来源：地质与地球物理研究所

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