Resources Science ›› 2017, Vol. 39 ›› Issue (2): 276-287.doi: 10.18402/resci.2017.02.10

• Orginal Article • Previous Articles     Next Articles

Simulation of spatio-temporal changes in evapotranspiration in typical mountains

Feiyu WANG1,2(), Chesheng ZHAN1(), Shi HU1, Yangwen JIA3, Cunwen NIU3, Jing ZOU4,5   

  1. 1. Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China
    2. University of Chinese Academy of Sciences,Beijing 100049,China
    3. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China
    4. Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology,Qingdao 266001,China
    5. Shandong Academy of Sciences Institute of Oceanographic Instrumentation,Qingdao 266001,China
  • Received:2016-01-08 Revised:2016-08-30 Online:2017-02-25 Published:2017-02-20

Abstract:

Based on a new land surface model CLM_CERES,spatio-temporal changes in evapotranspiration(ET)in three typical mountains of China (Taihang Mountain,Hengduan Mountain,and Qiangui Karst Mountain) in baseline of 1951-2005 and estimation period of 2006-2060 were simulated. The CLM_CERES model was constructed by considering the scheme of water exploitation and utilization,and coupled with the crop growth and development model CERES. This new land surface model was driven by the atmosphere external forcing data of multi-model ensemble data of CMIP5. The simulated results were validated with a data-driven estimate of global land evapotranspiration (MTE data)derived from observations from a global network of micrometeorological tower sites(FLUXNET). The results showed that ET simulated by CLM_CERES was consistent with the MTE data among all three regions at a monthly scale (R2= 0.76~0.88). From 1951 to 2060,the total ET increased significantly with linear trends of 0.981 and 0.757 mm/a (P < 0.001)over Taihang Mountain and Hengduan Mountain,of which vegetation ET dominated. However,the total ET increased insignificantly over Qiangui Karst Mountain,of which soil evaporation dominated. Intra-annual variation of ET in all three regions from 1951 to 2060 showed unimodal curves with a peak region from May to September. The spatial distribution of ET was mainly influenced by climate change and topographic factors over Taihang Mountain and Hengduan Mountain. The spatial distribution of ET over Qiangui Karst Mountain was more complex due to the particularity of dualistic structure between surface and ground water.

Key words: evapotranspiration, spatio-temporal change, CLM, CERES, Taihang Mountain, Hengduan Mountain, Qiangui Karst Mountain