| 科尔沁沙地风沙土地温特征及其分析 |
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| 引用本文： | 李玉霖,崔建垣.科尔沁沙地风沙土地温特征及其分析[J].中国沙漠,2000,20(Z1):42-44. |
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| 作者姓名： | 李玉霖 崔建垣 |
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| 作者单位： | 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000 |
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| 基金项目： | 国家"973"项目(G1999043400);国家"九五"攻关项目(96-920-13-02);院特别支持项目(KZ95T-04;KZ951-A1-301);院重点项目(KZ-952-91-218);国家重大基金课题(49890330);内蒙科委课题"西部之光"(999078);自然科学基金(990141) |
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| 摘 要： | 通过对科尔沁沙地3种类型风沙土中地温的变化特征分析,有植被覆盖和裸露地表条件下地温的关系探讨。结果表明:①地温随时间进程有明显的日变化规律,随深度加深地温日变化振幅按指数规律减小;②半固定风沙土的浅层(5~20 cm)地温略高于流动风沙土和固定风沙土,尤其表现在地温达到最大值时;③流动风沙土土壤热扩散率λ较大,固定风沙土土壤热扩散率λ较小;4有植被覆盖的风沙土中平均地温略高于裸露地表下的平均地温。
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| 关 键 词： | 科尔沁沙地 风沙土 地温 土壤热扩散率 |
| 收稿时间： | 2000-01-15 |
| 修稿时间： | 2000-03-20 |
Characteristics of the Aeolian Sandy Soil Temperature and its Analysis in Horqin Sandland |
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| LI Yu-lin,CUI Jian-yuan.Characteristics of the Aeolian Sandy Soil Temperature and its Analysis in Horqin Sandland[J].Journal of Desert Research,2000,20(Z1):42-44. |
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| Authors: | LI Yu-lin CUI Jian-yuan |
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| Institution: | Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | In this paper,the characteristics of soil temperature in three types of aeolian sandy soils in Horqin sandland were analyzed,and the soil temperatures were measured in planted ground and bare ground.The results are as follows:① the soil temperature changed distinctly with the change of the time and the depth;② the soil temperature in semi-fixed aeolian sandy soil was slightly higher than that in shifting and fixed ones,especially at the time when soil temperature reaches the maximum;③ the value of thermal diffusivity of mobile aeolian sandy soil was larger than that of fixed aeolian sandy soil;④ average soil temperature in planted ground was slightly higher than that in bare ground. |
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| Keywords: | Horqin sandland aeolian sandy soil soil temperature thermal diffusivity |
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