热带雨林林缘不同热力作用面热力特征初探

片断化森林林缘不仅具有水平空间特征,同时也具有立体空间特征.为探讨立体林缘壁面的热力效应是否存在,该热力效应与林内外地面、林冠的差异,该文利用西双版纳热带雨林南向边缘的表温观测资料,采用同期资料对比方法,分析了片断化热带雨林林缘不同热力作用面表面温度的水平、垂直分布特征及其差异. 指出在片断化热带雨林林缘,林缘壁面的热力效应是不可忽视的.在林缘区域,除了公认的林外地表面、林冠面和林内地表面3个热力作用面之外,林缘壁面构成了一个新的第4热力作用面. 对其进行深入细致的研究,将有助于解释森林边缘的小气候效应和生物效应.

Temperature characteristics of different thermal active surfaces near edge of tropical rain forest

Fragmented forest edges have both horizontal space and tridimensional space characteristics. In order to explore whether thermal effect of vertical active surface exist or not, and to compare it with that of soil surface in and out forest, forest canopy surface, this paper choose contrasting data of the corresponding period method to analyze horizontal and vertical distribution characteristics and differences of surface temperature of different thermal active surfaces in fragmented forest edges by using surface temperature measurement data of south edge of fragmented tropical rain forest in Xishuangbanna. The findings showed that: thermal effect of vertical active surface of edge could be neglected at the edge of fragmented forest; vertical active surface of edge was a new thermal active surface with the exception of forest canopy surface, soil surface in and out the forest. This kind of study will help to understand microclimatic and biological effect of forest edge.