北京师范大学学报（自然科学版）2016，Vol.52Issue(5)：586-590,5.DOI:10.16360/j.cnki.jbnuns.2016.05.009
地形对贺兰山高山林线分布高度的影响∗
Effect of topography on alpine timberline altitude of Mountain Helan
摘要
Abstract
Alpine timberline (AT)positions on Mountain Helan were obtained from RS data by spatial analysis,topographic data were used to quantify effect of topography on AT altitude with correlation analysis and multiple linear regression analysis.The mean altitude of AT upper and lower borderline was found to be 3 106 m.a.s.l and 3 022 m.a.s.l,respectively.The range and mean altitude of both AT borderlines was found to be higher on the west side of Mountain Helan.The contribution of South-North Contrast Index (SNCI)and Topographic Index (TI)to the altitude of AT upper borderline on west side was 56.7% and 43.3%, respectively.Contribution of SNCI,TI and Slope to the upper borderline of AT altitude on east side was found to be 50.9%,31.0% and 18.1%,respectively.Therefore aspect is a significant factor regulating AT altitude.关键词
高山林线/高度/地形/贺兰山Key words
alpine timberline (AT)/altitude/topography/Mountain Helan分类
天文与地球科学引用本文复制引用
刘锬,江源..地形对贺兰山高山林线分布高度的影响∗[J].北京师范大学学报（自然科学版）,2016,52(5):586-590,5.基金项目
国家自然科学基金资助项目(41630750) （41630750）
