Silicate weathering and CO2 consumption deduced from the seven Chinese rivers originating in the Qinghai-Tibet Plateau

Wu, Weihua; Xu, Shidang; Jun, Yang; Yin, Handong

doi:10.1016/j.chemgeo.2008.01.025

Cited by 148 publications

(109 citation statements)

References 30 publications

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“…Compared with other world rivers, the TDS of study rivers are relatively higher, averaging 269 mg/l, which is 2 times higher than that of the Brahmaputra (110 mg/l) (Singh et al 2005) and *1.5 times of the Indus Rivers (164 mg/l) (Karim and Veizer 2000) and the Ganges (130 mg/l) (Galy and France-Lanord 1999). While it is very similar to that of the Upper Huang He (274 mg/l) (Wu et al 2005), it is lower than that of the rivers originating in the Qinghai-Tibet Plateau Wu et al 2008a). The water chemistry and TDS are strongly influenced by the lithology, hydroclimate, geography, and human activities, etc.…”

Section: Comparisonmentioning

confidence: 77%

“…The fluxes of CO 2 consumed during silicate and carbonate weathering have been calculated from the corresponding cations, discharges, and drainage area (Amiotte Suchet et al 1995, 2003Wu et al 2008a):…”

Section: The Weathering Rate In the Catchmentmentioning

confidence: 99%

“…Recently, those rivers originating in the southern slopes of the Himalaya have gained great concern. A number of arguments have suggested that the uplift of the Himalaya and heavy monsoonal precipitation promote rapid physical erosion and chemical weathering and thereby enhance CO 2 consumption (Dalai et al 2002;Hren et al 2007;Wu et al 2008a).…”

Section: Introductionmentioning

confidence: 99%

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Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system: weathering processes and CO2 consumption

et al. 2015

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The study focuses on the chemical compositions of the river waters in the middle and upper reaches of the Yarlung Tsangpo river system. Samples were collected in two periods along the river system to analyze the spatiotemporal variation characteristics and to determine the weathering processes and CO 2 consumption. The results show that the chemical facies of river waters are dominated by Ca-HCO 3 type and the TDS values cover a wide range of 98.2-619.8 mg/l with an average value of 268.6 mg/l, which is higher than that of the global river waters. There are three major reservoirs (carbonates, evaporites, and silicates) contributing to the major ions, and the predominances of the reservoirs of different rivers show spatial heterogeneity. The chemical weathering rates of silicates and carbonates are 3.43 and 4.49 t/km 2 /year, respectively. Overall, the middle and upper reaches of Yarlung Tsangpo are responsible for 0.3 and 0.16 % of global atmospheric CO 2 consumption by silicates (1.7 9 10 5 mol/ km 2 /year) and carbonates (1.27 9 10 5 mol/km 2 /year), respectively. In addition, the chemical weathering fluxes of the catchments consume atmospheric CO 2 of 0.5456 Tg C/year, accounting for 0.14 % of the total organic carbon flux to the oceans by rivers globally.

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Section: Comparisonmentioning

confidence: 77%

Section: The Weathering Rate In the Catchmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system: weathering processes and CO2 consumption

et al. 2015

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“…Compared with the rivers originating in the Qinghai-Tibet Plateau, CO 2 consumption flux by the weathering of silicate rocks within the 2nd Songhuajiang Basin (128 Â 10 3 mol km À2 a À1 ) is comparable with that of the Huanghe (120 Â 10 3 mol km À2 a À1 , Wu et al, 2005), Brahmaputra (150 Â 10 3 mol km À2 a À1 , Gaillardet et al, 1999b) and Dadu He (180 Â 10 3 mol km À2 a À1 , Wu et al, 2008). The CO 2 consumption from the weathering of silicate rocks within the whole Songhuajiang Basin (66.6 Â 10 3 mol km À2 a À1 ) is on the same order of magnitude with that of the MeKong (70 Â 10 3 mol km À2 a À1 , Wu et al, 2008). The value for Nenjiang Basin (40.6 Â 10 3 mol km À2 a À1 ) is relatively lower, but is comparable with that of the Indus (60 Â 10 3 mol km À2 -a À1 , Gaillardet et al, 1999b).…”

Section: Chemical Weathering and Co 2 Consumption Ratementioning

confidence: 94%

Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Liu

Zhang

et al. 2013

Applied Geochemistry

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“…In particular, the water chemistry of many of the plateau's lakes is affected by changes in the surrounding basin hydrology (Mitamura et al, 2003). In recent decades, research on the surface water chemistry of the Qinghai-Tibet Plateau has mostly focused on areas with convenient access and significant impacts of human activities, such as the Qaidam Basin (Tan et al, 2011), Qinghai Lake (Xiao et al, 2012;Xu et al, 2010), and river source regions (Noh et al, 2009;Qin et al, 2006;Wu et al, 2005Wu et al, , 2008 in the Qinghai Province, China. Investigations and analyses of large lakes and rivers located in central and southern Tibet are equally abundant, such as studies of Lake Nam Co Zhang et al, 2008), Lake Yamzhog Yumco (Sun et al, 2013;Zhang et al, 2012), Lake Mapam Yumco (Wang et al, 2013), and the Yarlung Tsangpo River Basin (Guilmette et al, 2009;Hren et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

Wang

Liu

Jiang

et al. 2016

Journal of Environmental Sciences

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The geochemistry of natural waters in the Changtang Nature Reserve, northern Tibet, can help us understand the geology of catchments, and provide additional insight in surface processes that influence water chemistry such as rock weathering on the Qinghai-Tibet Plateau. However, severe natural conditions are responsible for a lack of scientific data for this area. This study represents the first investigation of the chemical composition of surface waters and weathering effects in two lake basins in the reserve (Lake Dogaicoring Qiangco and Lake Longwei Co). The results indicate that total dissolved solids (TDS) in the two lakes are significantly higher than in other gauged lakes on the Qinghai-Tibet Plateau, reaching 20-40 g/L, and that TDS of the tectonic lake (Lake Dogaicoring Qiangco) is significantly higher than that of the barrier lake (Lake Longwei Co). Na + and Cl − are the dominant ions in the lake waters as well as in the glacier-fed lake inflows, with chemical compositions mainly affected by halite weathering. In contrast, ion contents of inflowing rivers fed by nearby runoff are lower and concentrations of dominant ions are not significant. Evaporite, silicate, and carbonate weathering has relatively equal effects on these rivers. Due to their limited scope, small streams near the lakes are less affected by carbonate than by silicate weathering.

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Silicate weathering and CO2 consumption deduced from the seven Chinese rivers originating in the Qinghai-Tibet Plateau

Cited by 148 publications

References 30 publications

Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system: weathering processes and CO2 consumption

Hydrochemistry of the middle and upper reaches of the Yarlung Tsangpo River system: weathering processes and CO2 consumption

Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China

Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

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