Articles | Volume 17, issue 14
Research article
31 Jul 2020
Research article |  | 31 Jul 2020

Temporary and net sinks of atmospheric CO2 due to chemical weathering in subtropical catchment with mixing carbonate and silicate lithology

Yingjie Cao, Yingxue Xuan, Changyuan Tang, Shuai Guan, and Yisheng Peng

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Cited articles

Appelo, C. A. J. and Postma, D.: Geochemistry, groundwater and pollution, CRC press, Boca Raton, United States, 2005. 
Berner, R. A. and Kothavala, Z.: GEOCARB III: a revised model of atmospheric CO2 over Phanerozoic time, Am. J. Sci., 301, 182–204, 2001. 
Cao, Y., Tang, C., Song, X., and Liu, C.: Major ion chemistry, chemical weathering and CO2 consumption in the Songhua River basin, Northeast China, Environ. Earth Sci., 73, 7505–7516, 2015. 
Cao, Y., Tang, C., Song, X., Liu, C., and Zhang, Y.: Identifying the hydrochemical characteristics of rivers and groundwater by multivariate statistical analysis in the Sanjiang Plain, China, Appl. Water Sci., 6, 169–178, 2016a. 
Cao, Y., Tang, C., Cao, G., and Wang, X.: Hydrochemical zoning: natural and anthropogenic origins of the major elements in the surface water of Taizi River Basin, Northeast China, Environ. Earth Sci., 75, 1–14, 2016b. 
Short summary
About half of the global CO2 sequestration due to chemical weathering occurs in warm and high-runoff regions. To evaluate the temporary and net sinks of atmospheric CO2 due to chemical weathering, we selected a typical subtropical catchment as our study area and did fieldwork to sample surface water along the main channel and major tributaries in 1 hydrological year. The result of mass balance calculation showed that human activities dramatically decreased the CO2 net sink.
Final-revised paper