藏北典型高寒草原土壤微气候对增温的响应
Response of Soil Microclimate to Warming in Alpine Steppe, Northern Tibetan Plateau
查看参考文献25篇
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文摘
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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。 |
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其他语种文摘
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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. |
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来源
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山地学报
,2014,32(4):401-406 【核心库】
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关键词
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土壤微气候
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开顶箱
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增温
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青藏高原
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地址
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中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 四川, 成都, 610041
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1008-2786 |
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学科
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植物学 |
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基金
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国家自然科学基金项目
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文献收藏号
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CSCD:5220404
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