西双版纳热带季节雨林林冠层温度与大气温度特征  

Characteristics of canopy and air temperature in tropical seasonal rainforests in Xishuangbanna

作　　者：杨振[1,2] 张一平[1] 于贵瑞[3] 赵双菊 宋清海[1] 高举明[1,2] 

机构地区：[1]中国科学院西双版纳热带植物园,昆明650223 [2]中国科学院研究生院,北京100039 [3]中国科学院地理科学与资源环境研究所,北京100101 [4]云南省建筑材料科学研究设计院,昆明650221

出　　处：《生态学杂志》2009年第5期845-849,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(40571163);中国科学院知识创新工程重要方向项目(KJCX2-YW-432-1);中国科学院创新工程重大项目(KZCX1-SW-01-01A);国家重点基础研究发展计划资助项目(2002CB412501)

摘　　要：根据2005年西双版纳热带季节雨林群落冠层植物表面温度以及林冠上、林冠下的气温资料,对热带季节雨林冠层温度和冠层气温及其之间的温度差异在不同季节的变化进行了分析。结果表明:热带季节雨林冠层温度除雾凉季夜间稍低于同层大气温度外,其他时间林冠温度皆高于同层大气温度,在雾凉季和干热季,热带季节雨林林冠上气温在大多数时刻高于林冠下气温;在中午前后林冠上气温低于林冠下气温。在平均温度较高的雨季,林冠上气温一直高于林冠下大气的温度;林冠上、林冠下气温之间的差异,显示西双版纳热带季节雨林林冠的生态效应对森林小气候的反馈作用;在雾凉季夜晚,热带季节雨林林冠温度与冠层气温与其他时间不同,雾凉季夜间低温是热带季节雨林能否存在的关键性限制因子。Based on the observation data in 2005, this paper analyzed the seasonal variations of the canopy temperature and the air temperature above and below the canopy in a tropical seasonal rainforest in Xishuangbanna of Southwest China. The results showed that at the same layers, the canopy temperature was higher than the air temperature except at nights of foggy-cool season. At most time of foggy-cool and dry-heat seasons, the air temperature above the canopy was higher than that below the canopy, while there was an opposite trend at noon time. In the rain season with higher mean air temperature, the air temperature above the canopy was all along higher than that below the canopy. The differences in the variations of the air temperature above and below the canopy presented the feedback effect of the seasonal tropical rainforest canopy to the microclimate in the forest. At the night time of foggy-cool season, the canopy temperature and air temperature differed with those at other time, suggesting cool season was the key limiting factor for the Xishuangbanna. that the low temperature at the nights of foggyexistence of tropical seasonal rainforests in

关 键 词：西双版纳 热带季节雨林 林冠温度 林冠气温 

分 类 号：S718.5[农业科学—林学]