X img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索
作者投稿 专家审稿 编辑办公 编委办公 主编办公

冰川冻土 ›› 1989, Vol. 11 ›› Issue (2): 113-124.

• 研究论文 • 上一篇    下一篇

青藏高原东南部现代雪线和林线及其关系的初步研究

吴锡浩   

  1. 地质矿产部地质力学研究所 北京
  • 收稿日期:1987-07-21 修回日期:1987-12-02 出版日期:1989-05-25 发布日期:2012-04-26

A Preliminary Study on Existing Snowline Tember Line and Their Relations in Southeastern Part of the Qinghai-Xizang Plateau

Wu Xihao   

  1. Institute of Geomechanics, Ministry of Geology and Mineral Resources
  • Received:1987-07-21 Revised:1987-12-02 Online:1989-05-25 Published:2012-04-26

摘要: 本文用定量方法研究青藏高原东南部区域雪线和林线的高度、温度、降水和湿度特征。在空间变化上,雪线和林线的同步性在于它们都由气候因子中的温度和降水决定的;而两者的差异性在于雪线主要受降水及其年分配控制,林线主要受温度及其年较差支配。

关键词: 青藏高原东南部, 雪线, 林线, 空间分布, 气候条件

Abstract: The southeastern part of Qinghai-Xizang plateau is a typical region in which there are glaciers and dark coniferous forests. Some conclusions were obtained based on the study of altitudes of regional snowline, regional timber line, temperature, precipitation and their relationships: 1. Because of the decrease of precipitation from the margin to the inland of Tibet and of the temperature-rising effect of Tibet in summer, snowline and timber line rise from southeast margin of the plateau to the inland, which has interrupted the normal latitude distribution law. 2. Temperature, precipitation annual distribution of precipitation and the perantage of snow in annual precipitation are all the factors cotrolling the spatial distribution of snowline when the lo.west requirement for temperature and precipitation to form snowline were met. 3. When the lowest growth requirement for precipitation was met, the annual amplitude of temperature and its annual distribution controll spatial distribution of tember line. 4. The altitude difference between snowline and timberline, which depends on snowline controlled by precipitation, is different in different climate zones. 5. It is certain that all the glaciers in the region where there is no periglacial zone are the most typical temperate glacier, as seen in the southeast Xizang.

Key words: southeastern part of Qinghai-Xizang plateau, snowline, temberline, spatial distribution, climatic condition