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

	Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China
	Liu, Baojian; Liu, Cong-Qiang; Zhang, Gan; Zhao, Zhi-Qi; Li, Si-Liang; Hu, Jian; Ding, Hu; Lang, Yun-Chao; Li, Xiao-Dong
	2013
发表期刊	Applied Geochemistry
卷号	31 期号:2 页码:265-278
摘要	For the first time, the river water geochemistry of the Songhuajiang Basin, the third largest river system in China, has been studied in order to understand chemical weathering and associated CO2 consumption rate in a mid- to cool temperate and monsoon-controlled climatic zone. The major ion compositions of the river waters are characterized by the dominance of Ca2+ and HCO3-, accounting for 46% and 74% of major cations and anions, respectively. The average total dissolved solids (TDS, 116 mg L-1) and total cation concentration (TZ(+), 1388 mu Eq L-1) of the river waters are similar to those of global major rivers. The chemical weathering rates of carbonate, silicate and evaporites in the whole Songhuajiang Basin are estimated to be approximately 5.15, 2.23 and 0.40 t km(-2) a(-1), respectively. The total rock weathering rate for the whole Songhuajiang Basin is approximately 7.78 t km(-2) a(-1), which is at the lower end of the spectrum for global major rivers, and is comparable with that of the Amur and the Congo-Zaire River. The estimated CO2 consumption rates for the whole Songhuajiang Basin are 53.4 x 10(3) mol km(-2) a(-1) and 66.6 x 10(3) mol km(-2) a(-1) by carbonate and silicate weathering, respectively. As a sub-basin, the 2nd Songhuajiang has the highest (18.9 t km(-2) a(-1)) while the Nenjiang River Basin has the lowest total rock weathering rate (5.03 t km(-2) a(-1)), which indicates important controls of regional climate and lithology. Compared to the large rivers of China, total rock weathering rates increase from north to south, supporting the idea that the climate acts as major control on global chemical weathering. The CO2 consumption rate by silicate weathering within the whole Songhuajiang River Basin, though under mid- to cool temperate climate, is in the same order of magnitude as that of Huanghe (82.4 x 10(3) - mol km(-2) a(-1)) and is not much lower than that of Changjiang (112 x 10(3) mol km(-2) a(-1)), which suggests that the role of Songhuajiang River weathering in long-term climate change cannot be neglected compared to those of the large rivers of China.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5098
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Liu, Baojian,Liu, Cong-Qiang,Zhang, Gan,et al. Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China[J]. Applied Geochemistry,2013,31(2):265-278　.
APA	Liu, Baojian.,Liu, Cong-Qiang.,Zhang, Gan.,Zhao, Zhi-Qi.,Li, Si-Liang.,...&Li, Xiao-Dong.(2013).Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China.Applied Geochemistry,31(2),265-278　.
MLA	Liu, Baojian,et al."Chemical weathering under mid- to cool temperate and monsoon-controlled climate: A study on water geochemistry of the Songhuajiang River system, northeast China".Applied Geochemistry 31.2(2013):265-278　.

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