高效经营雷竹林生态系统能量通量过程及闭合度

应用生态学报

高效经营雷竹林生态系统能量通量过程及闭合度

陈云飞¹,江洪^1,2**,周国模¹,孙成¹,陈健¹

(¹浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室, 杭州 311300; ^2南京大学国际地球系统科学研究所, 南京 210093)

出版日期:2013-04-18 发布日期:2013-04-18

Energy flux and energy balance closure of intensively managed Lei bamboo forest ecosystem.

CHEN Yun-fei¹, JIANG Hong^1,2, ZHOU Guo-mo¹, SUN Cheng¹, CHEN Jian¹

(¹Zhejiang Province Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China; ²International Institute for Earth System Science, Nanjing University, Nanjing 210093, China)

Online:2013-04-18 Published:2013-04-18

摘要/Abstract

摘要：

利用开路涡度相关系统和常规气象仪,对高效经营的雷竹林生态系统2011年的显热通量、潜热通量、净辐射、土壤热通量以及气温、地温、降雨量进行了观测,分析该生态系统能量通量的变化,以及各能量分量的分配特征,并计算了波文比及能量闭合.结果表明：雷竹林全年净辐射为2928.92 MJ·m^-2,潜热通量、显热通量和土壤热通量分别为1384.90、92754和-28.27 MJ·m^-2,各能量分量的日变化和月变化基本呈单峰曲线.潜热通量为能量散失主要形式,占净辐射的47.3%,显热通量占31.7%,波文比呈“U”型曲线,在0.285～2.062之间变化,土壤为热源.雷竹林年能量闭合度为0.782,月平均闭合度为0.808.

Abstract: By using open-path eddy covariance system and meteorological instruments, an observation was conducted on the sensitive heat flux, latent heat flux, net radiation, soil heat flux, air temperature, ground temperature, and precipitation in a intensively managed Lei bamboo forest ecosystem in 2011, with the diurnal and monthly variations of energy flux as well as the distribution pattern of each energy component analyzed, and the Bowen ratio and energy balance closure calculated. The yearly net radiation of the forest ecosystem was 2928.92 MJ·m^-2, and the latent heat flux, sensitive heat flux, and soil heat flux were 1384.90, 927.54, and -28.27 MJ·m^-2, respectively. Both the daily and the monthly variations of the energy components showed a single peak curve. The sensible and latent heat fluxes were 31.7% and 47.3% of the net radiation, respectively, indicating that latent heat flux was the main form of energy loss. The Bowen ratio followed the “U”shaped pattern, and fluctuated from 0.285 to 2.062, suggesting that soil was a heat source. The yearly energy balance closure of the forest ecosystem was 0.782, and the monthly average was 0.808.

陈云飞1,江洪1,2**,周国模1,孙成1,陈健1. 高效经营雷竹林生态系统能量通量过程及闭合度[J]. 应用生态学报.

CHEN Yun-fei1, JIANG Hong1,2, ZHOU Guo-mo1, SUN Cheng1, CHEN Jian1. Energy flux and energy balance closure of intensively managed Lei bamboo forest ecosystem.[J]. Chinese Journal of Applied Ecology.