浙江农林大学学报2016，Vol.33Issue(2)：216-224,9.DOI:10.11833/j.issn.2095-0756.2016.02.005
天目山常绿落叶阔叶混交林生态系统水汽通量特征
Water vapor flux features of an evergreen and deciduous broadleaf mixed forest in Mount Tianmu area
摘要
Abstract
Evapotranspiration (ET) is an important component of ecosystem water and energy balances, and subtropical evergreen and deciduous broadleaf forests play an important role in regional water cycles and bud-gets. To enhance prediction of climate change impact on the terrestrial ecosystem an improved understanding of the water and energy fluxes between vegetation and the atmosphere is needed. In Mount Tianmu area of Zhe-jiang Province, a subtropical evergreen and deciduous broadleaf mixed forest observation tower was set up in December 2012 with a three dimensional ultrasonic anemometer, a H2O/CO2 infrared analyzer, and conventional meteorological instruments for measuring a multi-layer gradient of temperature and humidity, windspeed, and radiation. Based on data observed from July 2013 to June 2014, water vapor flux features of the ecosystem were analyzed, and the net radiation responses to water vapor flux were determined. Results showed that annual wa-ter vapor flux was positive with distinct diurnal and seasonal variations. The maximum monthly water vapor flux occurred in July with a maximum daily 0.115 g·m-2·s-1; the lowest was in January with a maximum of only 0.029 g·m-2·s-1. The maximum quarterly water vapor flux occurred in summer, and the lowest was in January. The annual total ET was 721.25 mm ( about 51.5% of the annual precipitation). The annual net radiation (Rn) for this ecosystem was 3 305.65 MJ·m-2. Also, Rn was the main driving force of ET and was a key factor in energy balance. Thus, water vapor flux being positive meant that the ecosystem was the source of water va-por.关键词
森林生态学/水汽通量/涡度相关/典型常绿落叶阔叶混交林/净辐射/天目山Key words
forest ecology/water vapor flux/eddy covariance/typical evergreen and deciduous broadleaf mixed forest/net radiation/Mount Tianmu分类
农业科技引用本文复制引用
牛晓栋,江洪,方成圆,陈晓峰,孙恒..天目山常绿落叶阔叶混交林生态系统水汽通量特征[J].浙江农林大学学报,2016,33(2):216-224,9.基金项目
国家自然科学基金资助项目（61190114，41171324）；高等学校博士学科点专项科研基金资助项目（20110091110028）；科技部国家科技基础条件平台项目（2005DKA32300）；浙江省重点科技创新团队资助项目 （）
