Effects of nitrogen deposition on the carbon budget and water stress in Central Asia under climate change
Han, Qifei ， Xu, Wei ， Li, Chaofan
2024-08-27 JOURNAL OF ARID LAND 2024 16(卷), 8(期), (1118-1129页)
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影响因子:
Atmospheric deposition of nitrogen (N) plays a significant role in shaping the structure and functioning of various terrestrial ecosystems worldwide. However, the magnitude of N deposition on grassland ecosystems in Central Asia still remains highly uncertain. In this study, a multi-data approach was adopted to analyze the distribution and amplitude of N deposition effects in Central Asia from 1979 to 2014 using a process-based denitrification decomposition (DNDC) model. Results showed that total vegetation carbon (C) in Central Asia was 0.35 (+/- 0.09) Pg C/a and the averaged water stress index (WSI) was 0.20 (+/- 0.02) for the whole area. Increasing N deposition led to an increase in the vegetation C of 65.56 (+/- 83.03) Tg C and slightly decreased water stress in Central Asia. Findings of this study will expand both our understanding and predictive capacity of C characteristics under future increases in N deposition, and also serve as a valuable reference for decision-making regarding water resources management and climate change mitigation in arid and semi-arid areas globally.
