Abstract：
:To investigate the influence of chemical weathering on CO2 consumption, an analysis was performed of water chemistry by applying water chemistry equilibria methods in the Bishuiyan subterranean basin, SW China. The average value of total ion concentrations (TZ+) was 1,854.97 μEq/L, which was significantly higher than the global average value (TZ+ = 1,250 μEq/L). Ca2+ and HCO3- were the main ionic constituents in the waters. SO42- and NO3- concentrations were relatively higher than other anion concentrations, and Cl- concentrations were consistently the lowest. Dissolved load balance models result showed that carbonate weathering, silicate weathering, and atmospheric input were the primary ionic contributors, wherein the effects of carbonate weathering > silicate weathering > atmospheric input for the whole catchment, with the exception of Taiping, where silicate weathering was prominent over carbonate weathering. In addition, these analyses indicated that the erosion via rock weathering was also affected by atmospherically derived CO2 and allogenic acids. The estimated yield by quantitative calculation for the carbonate weathering rate was 59.7 t/(km2 year), which was 4.40 times higher than that of silicate weathering rate. Further, the carbonate and silicate weathering components of the carbon sink accounted for 71.2% and 28.8%, respectively, of the total basin rock weathering carbon sink.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Jiang P,Yu G,Zhang Q,Zou Y,Tang Q,Kang Z,Sytharith P,Xiao Hdoi
10.1038/s41598-020-68572-4subject
Has Abstractpub_date
2020-07-15 00:00:00pages
11677issue
1issn
2045-2322pii
10.1038/s41598-020-68572-4journal_volume
10pub_type
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