文献类型：期刊文献

中文题名：海南尖峰岭热带山地雨林近冠层CO_2及通量特征研究

英文题名：Study on the CO_2 grads and flux in near canopy layer of tropical mountain rainforest at Jianfengling, Hainan Island

作者：陈步峰[1] 林明献[1] 李意德[1] 邱坚锐[1] 骆土寿[1]

第一作者：陈步峰

机构：[1]中国林业科学研究院热带林业研究所

年份：2001

卷号：21

期号：12

起止页码：2166-2172

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目 ( No.39870 6 1 8);国家林业局重点资助项目 ( 2 0 0 1 -0 8)

语种：中文

中文关键词：热带山地雨林;近冠层;能量;水热通量;CO2梯度;CO2通量;海南

外文关键词：tropical mountain rainforest; CO 2 content;CO 2 fluxe;radiaion

分类号：S718.554

摘要：采用梯度法及 CI-30 1 PS CO2 系统 ,实现了海南尖峰岭热带山地雨林近冠层 CO2 、微气象因子梯度观测研究 ,结果表明 :雨季晴、晴间少云及多云天气 ,9:0 0～ 1 8:0 0 CO2 浓度平均值分别在 34 9～ 35 0 ml/m3 (冠上 2 .8m)、34 6～ 34 8ml/m3(冠上 0 .8m)、34 5～ 34 9ml/m3 (林内 1 6 m)、35 2～ 35 7ml/m3 (林内 5 m) ,较旱季相应天气分别小 1 4～ 1 7.5、1 0 .1～ 2 3.7、1 6 .4～ 35 .7和 1 8.1～ 36 .1 ml/m3 ;1 :0 0～ 8:0 0 ,则雨季 CO2 浓度大于旱季 ;梯度浓度廓变量和实时动力计算反映出 ,8:0 0～ 1 8:0 0 CO2 通量由大气向林冠层 ,旱、雨季平均 CO2 通量分别为 ( 0 .6 1× 1 0 - 6kg/( m2· s)和 0 .71× 1 0 - 6kg/( m2· s) ,1 9:0 0通量甚微 ,2 0 :0 0～ 7:0 0 CO2 通量则由林冠向大气 ,平均 CO2 通量分别为 0 .36× 1 0 - 6kg/( m2 · s)和 0 .32× 1 0 - 6kg/( m2· s) ;雨季昼夜大气流向冠层的净 CO2 通量是相应旱季的 1 .5 6倍。总辐射、冠顶净辐射通量以 1 3:0 0～ 1 5 :0 0为最大时域 ,相对林内 2 1 m,80 %的辐射热能被冠层吸收 ,与 CO2 通量正相关 ;晴天冠上潜热、感热最高值分别在 1 3:0 0～1 4 :0 0和 9:0 0 ,反映热带山地雨林近冠层的汇、源即白昼光合固定 CO2
Carbon dioxide and its flux with water and heat exchanging was studied by means of the gradent observation and outline methods in near canopy layer of tropical mountain rainforest for three years. The results were as follow: At fine, cloudlet and cloud weather in rainy season,the mean value of CO 2 content varied in a range of 349 to 350ml/m\+3 at 2.8m above the canopy, 346 to 348ml/m\+3 at 0.8m above the canopy, 345 to 349ml/m\+3 at 16m inner the forest and 352 to 357ml/m\+3 at 5m above ground in the period from 9:00 to 18:00.The CO 2 content in rainy season was lower than that in dry season. At the same weather and space-time, CO 2 content in rainy season was higher than that of CO 2 in dry season at both day and night. According to the grads calculation, there were the CO 2 flux from atmosphere to canopy with 0.61×10 -6 and 0.71×10 -6kg/(m 2·s) during day time in dry and rainy seasons respectively. And there was the CO 2 flux from forestland to top of canopy with 0.36×10 -6 and 0.32×10 -6kg/(m 2·s) during night in dry and rainy seasons respectively. Daily net flux of CO 2 in rainy season was 1.56 times than that in dray season. There was a maximize radiation at the canopy's top from 13:00 to 15:00 PM in fine weather.The CO 2 flux was a positive correlation with the effective radiation at the canopy layer.