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- W4220699730 abstract "Much dissolved inorganic carbon (DIC) may exist in lacustrine carbonates in the terminal lakes of closed basins in arid areas, and inorganic carbon sinks in arid regions are an important hypothesis of global carbon cycle research in recent years. Previous studies have made significant progress in estimating the inorganic carbon content. However, the source of inorganic carbon sinks remains unclear. Here, we choose four typical arid closed basins in North China to investigate the provenance of inorganic carbon sinks. The results show that CO2 absorbed by saline-alkaline soil is the main source of groundwater DIC in the study area, with a contribution rate of approximately 50%. Forty-three groundwater radiocarbon ages from arid closed basins indicate that the DIC in groundwater is transported along the direction of water flow and deposited in terminal lakes, forming inorganic carbon sinks. Our study suggests that the total inorganic carbon contents of Zhuye Lake, Yanchi Lake, Huahai Lake, and Qinghai Lake in the Holocene are 0.318 Pg, 0.003 Pg, 0.160 Pg, and 3.289 Pg, respectively. The results demonstrate that inorganic carbon sinks are much larger than lake organic carbon storage, thereby serving as an important carbon cycle factor in arid regions." @default.
- W4220699730 created "2022-04-03" @default.
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- W4220699730 date "2022-03-01" @default.
- W4220699730 modified "2023-09-27" @default.
- W4220699730 title "Provenance of Inorganic Carbon Sinks in Closed Basins" @default.
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- W4220699730 doi "https://doi.org/10.1029/2021wr030270" @default.
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