| 横断山区地形对水热条件的影响 |
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| 引用本文： | 文传甲.横断山区地形对水热条件的影响[J].山地学报,1989(1). |
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| 作者姓名： | 文传甲 |
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| 作者单位： | 中国科学院成都山地灾害与环境研究所 |
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| 摘 要： | 横断山区地形大体由近南北向山脉、少量近东西向山脉、山谷、山间盆地与高原组成。区内一系列近南北向山脉与大江相间呈波状起伏,降水量、日照与气温高低相间也呈波状起伏。这是地形波的影响结果 近东西山脉对气流起阻滞作用,使山脉南北两侧的水热要素值不同。山谷和山间盆地内较干旱,温高,少雨,日照多。高原对气流起屏障、拦截与集聚作用。
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| 关 键 词： | 横断山区 地形 水热条件 |
INFLUENCE OF THE RELIEF ON CONDITIONS OF WATER AND HEAT IN THE HENGDUAN MOUNTAINOUS REGION |
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| Wen Chuanjia.INFLUENCE OF THE RELIEF ON CONDITIONS OF WATER AND HEAT IN THE HENGDUAN MOUNTAINOUS REGION[J].Journal of Mountain Research,1989(1). |
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| Authors: | Wen Chuanjia |
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| Abstract: | In the Hengduan Mountainous Region, humid-warm upper-air current blowing from southwest or southeast affecting of the continental thermal low in summer is perpendicular approximately to a series of south trend of mountains and valleys. When it blows to the higher, middle and north of this region from both sides, and crosses repeatedly slopes and these mountains, the precipitation falls again and again. Thereby, precipitation of this region is increased and their kinetic energy and water vapour is decreased. The relief of Hengduan Mountainous Region is undulating, thus the annual precipitation, insolation duration and temperature are undulating in the east-west direction. Precipitation of the south is more than the north and the middle of this region is a ralative less precipitation district. The conditions of water and heat between the east and west slopes in the east and west of this region is opposite completely.The valley or basin in mountains cause that in their bottoms, air is warmer or more thermal and drier, the precipitation less, the insolation duration is more than the slopes of two sides or all round, thus forming the valley climate or basin climate.The relief as a woodwind instrument which mouth is toward east nearby Yaan, and air current by east caused that rainfall and cloudness are more, and the insolation duration is less. |
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| Keywords: | Hengduan Mountainous Region relief conditions of water and neat |
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