Sciences in Cold and Arid Regions ›› 2016, Vol. 8 ›› Issue (2): 125-134.doi: 10.3724/SP.J.1226.2016.00125

• ARTICLES • Previous Articles    

Influence of short-term experimental warming on heat-water processes of the active layer in a swamp meadow ecosystem of the Qinghai-Tibet Plateau

GuangSheng Liu1, GenXu Wang2   

  1. 1. College of Environmental Science and Engineering, Xiamen University of Technology, Xiamen, Fujian 361024, China;
    2. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China
  • Received:2015-07-27 Revised:2015-11-19 Published:2018-11-23
  • Contact: GuangSheng Liu
  • Supported by:
    This study was funded by The Natural Science foundation of China(No.40925002) and The Natural Science foundation of Fujian Province(No.2015J05114).

Abstract: Climate change is now evident in the Qinghai-Tibet Plateau(QTP),with impacts on the alpine ecosystem,particularly on water and heat balance between the active layer and the atmosphere.Thus,we document the basic characteristics of changes in the water and heat dynamics in response to experimental warming in a typical alpine swamp meadow ecosystem.Data sets under open top chambers(OTC) and the control manipulations were collected over a complete year.The results show that annual(2008) air temperatures of OTC-1 and OTC-2 were 6.7℃ and 3.5℃ warmer than the control.Rising temperature promotes plant growth and development.The freeze-thaw and isothermal days of OTCs appeared more frequently than the control,owing to comparably higher water and better vegetation conditions.OTCs soil moisture decreased with the decrease of soil depth;however,there was an obviously middle dry aquifer of the control,which is familiar in QTP.Moreover,experimental warming led to an increase in topsoil water content due to poorly drained swamp meadow ecosystem with higher organic matter content and thicker root horizons.The results of this study will have some contributions to alpine cold ecosystem water-heat process and water cycle under climate change.

Key words: experimental warming, open top chamber, Qinghai-Tibet Plateau, soil moisture, soil temperature, alpine swamp meadow ecosystem

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