西双版纳热带次生林林窗边缘树表温度的时空分布

Temporal spatial characteristics of trunk surface temperature at the edge of canopy gap in tropical secondary forest of Xishuangbanna in dry season.

该文利用热带次生林林窗边缘树干的表面温度观测资料 ,探讨了昼间林窗边缘和林内树表温的时空分布和变化规律、林窗边缘与林内树表温的差异、林窗边缘树表温与林窗中央地表温的差异 .指出在林窗区域 ,受太阳直接照射的东侧和北侧林墙中部存在表面温度高值区 ,是林窗区域除林冠面、林窗地面、林内地面之外的新的第 4热力作用面 ,对探讨林窗区域的热量传输、小气候形成以及林窗边缘植物的侧向生长等均有重要意义 .其结果可为进一步研究林窗小气候形成机制提供研究基础 。

Microclimatic measurements were conducted at the edge of secondary forest canopy gap in Xishuangbanna, Yunnan Province, in fog cool season and dry hot season. The temporal spatial distribution of trunk surface temperature at the edge of canopy gap and in the interior of secondary forest were discussed in this paper. The differences between the edge of canopy gap and interior of forest and the differences between trunk surface temperature at the edge and surface temperature in the center of gap were also analyzed. The findings showed that there were high temperature regions on the east and north of middle vertical active surface of edge. So that the vertical active surface of edge is a new thermal active surface on the vicinage of canopy gap beyond soil surface on the interior of forest, soil surface on the gap, and forest canopy surface. The results supply a research basis for understanding microclimatic formation of canopy gap, the regeneration of forest canopy gap and for studying impacts of biodiversity.