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青藏高原通天河盆地的多年冻土分布特征及其融区的发展趋势
Alternative TitleThe Distribution Characteristic of Permafrost of Tongtian River Basin on Qinghai-Xizang Plateau and Its Growth Tendency in Melting Area
黄大庭
Corresponding Author黄大庭
1986
Source Publication冰川冻土
ISSN1000-0240
Volume8Issue:1Pages:29-39+100
Abstract 青藏高原腹部地带的通天河盆地,具有高海拔、低气压、气候严寒多变、冻结期长等特点,理应是多年冻土发育之地区。但事实并非如此,而是融区分布范围相当广泛,就多年冻土区中,也存在着局部的岛状融区。并且这里的多年冻土,以年平均地温高、厚度薄、不稳定、无厚层地下冰等特征而区别于邻区。 形成这样广泛的融区并非偶然,笔者认为除地形、地貌、岩性特征,严寒多变的气候,地表光秃粗糙,河床宽浅等条件有关外,主要则是区域性的地壳构造活动所致。因在融区的形成和发展过程中,直接起控制作用的是地温,而地温又主要取决于地壳内部的地热,及地壳外部的气候条件这两个因素。同时,根据现有资料的分析,笔者认为此融区今后发展的总趋势是缩小(退化)。 
Other AbstractTongtian River Basin is located in the centre of Qinghai-Xizang Plateau, with such characteristics as high elevation, low pressure, severe cold and changable climate, and long-term freeze. It should be suitable for growing permafrost, it is not the case, however.Despite all this,in Tongtian River Basin the melting area is extensively distributed.Even if in permafrost areas,there are some melting areas formed as island. The characters that they can be different from the neighbouringareas are: The average annual ground temperature is -0.3 —— -0.4℃ theirthickness is 15-25m and they are unsteady and no thick ground ice.The author considers that the formation of vast melting area is closely related to its relief, landforms and rock features, as well as to cold and changeable climate, spacious valley,wide and shallow river bed,developing meanders, bare and coarse ground surface and hydrogeologic conditions, but it is the result of the regional crustal movement.Analysing the data, the climate of Qinghai-Xizang Plateau is tending to cold.Therefore the melting areas will gradually recede, i.e. the distribution of melting areas would be reducing from now on.
Keyword融区 通天河盆地 多年冻土分布 青藏高原 多年冻土区 年平均地温 季节冻土层 发展趋势 河水温度 水量
Language中文
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/8003
Collection成都山地所知识仓储(2009年以前)
Recommended Citation
GB/T 7714
黄大庭. 青藏高原通天河盆地的多年冻土分布特征及其融区的发展趋势[J]. 冰川冻土,1986,8(1):29-39+100.
APA 黄大庭.(1986).青藏高原通天河盆地的多年冻土分布特征及其融区的发展趋势.冰川冻土,8(1),29-39+100.
MLA 黄大庭."青藏高原通天河盆地的多年冻土分布特征及其融区的发展趋势".冰川冻土 8.1(1986):29-39+100.
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