Intensified risk to ecosystem productivity under climate change in the arid/humid transition zone in northern China |
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| Authors: | Yin Yunhe Deng Haoyu Ma Danyang Wu Shaohong |
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| Institution: | 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China2. Henan Province Development and Reform Commission, Zhengzhou 450018, China3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Assessing the climate change risk faced by the ecosystems in the arid/humid tran-sition zone(AHTZ)in northern China holds scientific significance to climate change adapta-tion.We simulated the net primary productivity(NPP)for four representative concentration pathways(RCPs)using an improved Lund-Potsdam-Jena model.Then a method was estab-lished based on the NPP to identify the climate change risk level.From the midterm period(2041-2070)to the long-term period(2071-2099),the risks indicated by the negative anom-aly and the downward trend of the NPP gradually extended and increased.The higher the scenario emissions,the more serious the risk.In particular,under the RCP8.5 scenario,dur-ing 2071-2099,the total risk area would be 81.85％,that of the high-risk area would reach 54.71％.In this high-risk area,the NPP anomaly would reach-96.00±46.95 gC·m-2·a-1,and the rate of change of the NPP would reach-3.56±3.40 gC·m-2·a-1.The eastern plain of the AHTZ and the eastern grasslands of Inner Mongolia are expected to become the main risk concentration areas.Our results indicated that the management of future climate change risks requires the consideration of the synergistic effects of warming and intensified drying on the ecosystem. |
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| Keywords: | climate change risk assessment arid/humid transition zone NPP ecosystem |
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