藏北高原土地沙漠化现状及其驱动机制

作为青藏高原主体的藏北高原是我国土地沙漠化三大分布区之－－青藏高原分布区的代表性地域，是研究现代土地沙漠化过程及其形成机制的重要地区。本文从沙漠化土地的类型、面积与分布等方面详细分析了藏北高原土地沙漠化的现状，定性与定量分析相结合探讨了该区现代沙漠化过程的主要影响因子及其驱动机制。研究结果表明，藏北高原是我国重要的沙漠化土地分布区、沙漠化土地面积大、类型多、程度重、分布广、危害重，其形成与发展是自然因素与人为因素、自然过程与人为过程共同作用的结果，其中气候变化是其主要驱动力。

Driving Mechanism and Status of Sandy Desetification in the Northern Tibet Plateau

The northern Tibet Plateau is the main part of Qinghai xizang (Tibet) Plateau and the typical region of the Qinghai xizang (Tibet) plateau sandy desertification distribution zone, which is one of the three distribution zones of sandy desertification in China. It is a very important region for the research on the process and driving mechanism of modern sandy desertification. This paper, on the basis of the data of recent sandy desertification surveying in Xizang (Tibet) Plateau, researches the status features of sandy desertification in the northern Tibet Plateau by analysis the type, area and distribution, analyses the influencing factors and driving mechanism of modern sandy desertification in the northern Tibet Plateau by use of the qualitative and quantitative methods. The research results of the forcing mechanism and status of sandy desertification in the northern Tibet Plateau can be concluded that The Northern Tibet Plateau is an important distribution region in China, which has large area, multiple type, high degree, wide distribution and serious damage of modern sandy desertification. The origination and development of sandy desertification in the northern Tibet Plateau is the results of comprehensive functions of natural factors and human factors, physical processes and artificial processes, in which the climatic change plays a leading role. The climatic change under the influence of global change is the main driving force in the modern process of sandy desertification in the northern Tibet Plateau.