藏北典型高寒草原土壤微气候对增温的响应-《山地学报》

文章信息/Info

Title:: Response of Soil Microclimate to Warming in Alpine Steppe, Northern Tibetan Plateau

作者:: 陈有超; 鲁旭阳; 李卫朋; 沙玉坤; 程根伟; 1中国科学院水利部成都山地灾害与环境研究所，山地表生过程与生态调控重点实验室，四川成都 610041； 2中国科学院大学，北京 100049； 3西华师范大学国土资源学院，四川南充 637002

Author(s):: CHEN Youchao; LU Xuyang; LI Weipeng; SHA Yukun; CHENG Gengwei; 1. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Land and Resource College, China West Normal University, Nanchong, Sichuan 637002, China

Keywords:: soil microclimate; opentop chamber (OTC); warming experiment; Tibetan Plateau

摘要:: 土壤微气候的改变会影响到一系列的生态系统过程，研究增温条件下土壤微气候变化特征将有助于了解气候变暖对草地生态系统水热条件的影响。利用开顶箱（opentop chamber, OTC）方法研究增温条件下藏北典型高寒草原土壤微气候变化特征。结果表明：藏北典型高寒草原土壤温度和土壤湿度存在明显的日变异和季节变异；增温使得空气年均温增加3.2℃，土壤年均温增加5.2℃，增温效果显著；增温可以显著提高土壤温度，值得注意的现象是非生长季的增加幅度大于生长季的增加幅度；增温对土壤湿度的影响具有明显的季节性，冬季增温会显著增加土壤湿度，而夏季增温会显著降低土壤湿度。研究结果可为变化气候条件下高寒地区水热状况研究提供依据。

Abstract:: The change in soil microclimate could affect many ecosystem processes, and study on soil microclimate’s response to warming will be helpful in climate change project.In this study, opentop chamber (OTC) was employed to investigate the response of soil microclimate to warming in a alpine steppe in Northern Tibetan Plateau. The results showed that: there was apparent diurnal and seasonal variation in soil microclimate in the alpine steppe; OTC elevated annual average air temperature by 3.2℃, soil temperature by 5.2℃;OTC could significantly elevate soil temperature, more increase in nongrowing season than in growing season; OTC could significantly elevate soil moisture in winter, while reduce the soil moisture in summer. This paper analyzed the response of soil microclimate to warming, and the results are helpful in studying the effect of climate change on hydrothermal regime in alpine region.

备注/Memo:: 收稿日期(Received date)：2014-01-11；改回日期(Accepted) : 2014-05-05。
基金项目（Foundation item）：国家自然科学
基金项目（41371267）资助。\[Supported by National Natural Science Foundation of China, No. 41371267.\]
作者简介（Biography）：陈有超（1988-），男，汉族，安徽滁州人，在读博士生，研究方向为生态学。\[Chen, Youchao, male, Ph.D candidate, major in Ecology.\] Tel: 18782109121，E-mail: whchenyouchao@163.com *
通信作者(Author for correspondence)：程根伟，研究员。\[Cheng, Genwei, Professor.\] E-mail: gwcheng@imde.ac.cn