摘要
本文用数学模式研究了青藏高原高寒草甸上下限的分布特征。认为其上限分布规律较强，下限分布规律较弱；向高原西北部，其上下限分布趋势面的相交曲线即高寒草甸可能的消失界线；高原西北部高寒草甸的消失主要是高原寒旱化气候条件的增强。
Two mathematical models for distributional zonalities of upper and lower limits of alpine meadow have been established respectively,which show that the distributional zonality of the upper limit is stronger than that of the lower limit.Concerning the trendsurface of the upper limit distribution,it has a maximum value of H at ( x,y )=(81 9,30 7),almost having the same longitude as that of the Gangdisi Nyainqentanglha Range.With regard to the trend surface of the lower limit distribution,it has an increasing tendency of H from southeast to northwest of the plateau.Study on the distribution of alpine meadow width indicates that the mentioned width is decreasing northwesterly.Altitudinally distributed alpine meadow starts disappearing from the boundary of x 2-7 7xy-0 4y 2+42 2x+790 2y- 14 821 4 =0
出处
《自然资源》
CSCD
北大核心
1997年第5期71-77,共7页
关键词
高寒草甸
分布
数学模式
Alpine meadow
Upper limit
Lower limit
Width
Maximum value
