| 藏北高原D110点不同季节土壤温度的日变化特征 |
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| 引用本文： | 杨梅学,姚檀栋,丁永建,王绍令,陈贤章,小池俊雄.藏北高原D110点不同季节土壤温度的日变化特征[J].地理科学,1999,19(6):570-574. |
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| 作者姓名： | 杨梅学 姚檀栋 丁永建 王绍令 陈贤章 小池俊雄 |
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| 作者单位： | 1. 中国科学院兰州冰川冻土研究所,冰芯与寒区环境实验室,甘肃,兰州,730000
2. 日本长岗技术科学大学 |
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| 基金项目： | 国家基础重点研究发展规划项目!G1998040800，中国科学院重大项目!KZ951 － B1 － 212，中日国际合作项目!GAME |
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| 摘 要： | 利用１９９８年ＧＡＭＥ－Ｔｉｂｅｔ加强观测期间取得的一个年周期的土壤温度资料，对藏北高原Ｄ１１０点土壤温度日变化特征的月际变化进行了分析。结果表明，在夏半年（５－９）月土壤温度存在明显的日变化，且基本上按正弦曲线变化，但相位随深度的增加而滞后；冬半年土壤温度尽管也存在日变化，但变幅较小。
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| 关 键 词： | 藏北高原 土壤温度 日变化 |
| 文章编号： | ：1000-0690(1999)06-0570-05 |
The Daily Variation of the Soil Temperature in Different Seasons at Site D110 in the Northern Part of Xizang Plateau |
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| YANG Mei-xue,YAO Tan-dong,DING Yong-jian,WANG Shao-ling,CHEN Xian-zhang,Toshio KOIKE.The Daily Variation of the Soil Temperature in Different Seasons at Site D110 in the Northern Part of Xizang Plateau[J].Scientia Geographica Sinica,1999,19(6):570-574. |
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| Authors: | YANG Mei-xue YAO Tan-dong DING Yong-jian WANG Shao-ling CHEN Xian-zhang Toshio KOIKE |
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| Abstract: | Based on the soil temperature data obtained in IOP period of GAME Tibet, 1998, the monthly changes of daily variation features of the soil temperature in D110 site, the northern part of the Xizang Plateau, have been analyzed. The results show that the soil temperature existed evident daily variation in summer season (May-September). It is a sine curve and consistent with solar radiation. However, the phase lagged as the depth increase. In winter season (October-April), there was also daily variation, but the amplitude was relatively small. As to the study period, the maximum daily variation appeared in August 1997. Then it decreased. In May 1998, the daily variation increased suddenly and reached to the highest point in June 1998. Meanwhile, the variation of the minimum temperature was small and gentle, but the maximum was large. In summer, the daily variation of the soil temperature at 40?cm depth is also evident. Its variation is fundamentally a sine curve and consistent with solar radiation. However, its phase is lagged as the depth increase. The transport direction of energy between surface and its below layer could change two times in summer. In winter, although the soil temperature showed relatively evident daily variation and played as sine curve, the temperature on surface was always below that of under layer. Even the surface could absorb the solar energy, but it was too little. The energy was transported from lower layer to upper layer all the day in winter. |
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| Keywords: | Northern Part of the Xizang Plateau Soil temperature Daily Variation |
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