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Water 2016, 8(9), 379;

Soil CO2 Uptake in Deserts and Its Implications to the Groundwater Environment

State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Center for Geo-Spatial Information, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
Department of Chemistry, Inha University, 100 Inharo, Incheon 402-751, Korea
Environmental Change Institute, University of Oxford, Oxford OX1 3QY, UK
Author to whom correspondence should be addressed.
Academic Editors: Y. Jun Xu, Guangxin Zhang and Hongyan Li
Received: 30 June 2016 / Revised: 30 August 2016 / Accepted: 30 August 2016 / Published: 5 September 2016
(This article belongs to the Special Issue Tackling Complex Water Problems in China under Changing Environment)
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Recent studies of soil carbon cycle in arid and semi-arid ecosystems demonstrated that there exists an abiotic CO2 absorption by saline-alkali soils (Aa) at desert ecosystems and suggested potential contributions of CO2 dissolution beneath deserts to the terrestrial ecosystems carbon balance. However, the overall importance of such soil CO2 uptake is still undetermined and its implications to the groundwater environment remain unaddressed. In this manuscript, a simple method is proposed for the direct computation of Aa from the total soil CO2 flux (Fa) as well as for the evaluation of Aa importance to Fa. An artificial soil-groundwater system was employed to investigate the implications to groundwater environment and it was found that soil CO2 uptake in deserts can contribute a possible influence on the evolution of the groundwater environment, providing that the absorbed CO2 largely remained in the soil-groundwater system. View Full-Text
Keywords: abiotic CO2 absorption; soil CO2 flux; the soil-groundwater system abiotic CO2 absorption; soil CO2 flux; the soil-groundwater system

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Wang, W.; Chen, X.; Zheng, H.; Yu, R.; Qian, J.; Zhang, Y.; Yu, J. Soil CO2 Uptake in Deserts and Its Implications to the Groundwater Environment. Water 2016, 8, 379.

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