1. Abiotic CO2 exchange between soil and atmosphere and its response to temperature
- Author
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Yuqing Zhang, Shugao Qin, Bin Wu, Xin Jia, Jia-Bin Liu, Wei Feng, Zongrui Lai, and Keyu Fa
- Subjects
Abiotic component ,Global and Planetary Change ,Soil Science ,Soil chemistry ,chemistry.chemical_element ,Geology ,Soil science ,Soil carbon ,Carbon sequestration ,Atmospheric sciences ,Pollution ,Carbon cycle ,Atmosphere ,chemistry.chemical_compound ,chemistry ,Carbon dioxide ,Environmental Chemistry ,Carbon ,Earth-Surface Processes ,Water Science and Technology - Abstract
Although abiotic CO2 exchange between soil and atmosphere is often observed in deserts, its contribution to carbon balance and accurate response to soil temperature (T s (°C)) are still uncertain. Abiotic soil carbon flux (ASCF) and T s were continuously measured on sterilized soil at 2-day intervals in the Mu Us Desert, northwestern China from May to October in 2012. The results showed that negative ASCF (CO2 absorption) occurred at night while positive ASCF (CO2 emission) during the day. Net CO2 sequestration during the 6 months totaled 64.37 g CO2 m−2 (0.09 μmol m−2 s−1). On the seasonal scale, ASCF was weakly correlated with T s (γ = 0.15, p
- Published
- 2014
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