橡胶林缘热力垂直特征的初步分析

Thermal Vertical Characteristics near to Edge of Rubber Forest

利用西南向橡胶林缘附近的气温观测资料，探讨了昼间橡胶林内、外热力垂直梯度和３个作用面的热力特征和相互作用，分析了森林片断林缘的气温垂直规律，以及林内、外差异，指出林冠是林缘最主要的热力作用面；林冠面、林内地面、林外地面的热力特征和相互作用约了林缘附近的热力变化。其结果为进一步研究林缘小气候形成机制提供了研究基础，并为研究森林片断化对生物多样性影响提供了科学依据。

Microclimatic measurements were conducted near to edge (facing southwest) of rubber forest in Xishuangbanna,Yunnan Province in Winter in 1998.The daytime thermal vertical characteristics at the clearcut and the interior of rubber forest and the thermal characteristics and interaction of three active surfaces were discussed in this paper.Vertical changes in air temperature and its differences between clearcut and interior of forest near to the edge were also analyzed.The findings showed that canopy was a key thermal active surface of the forest edge and the thermal variation was controlled by the thermal characteristics of the canopy,the interior and the clearcut grounds,and the interaction.The results supplied a research basis for understanding microclimatic formation of forest edges,and also for studying impacts of forest fragmentation on biodiversity.