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| 半干旱夏季放牧草地能量收支和地表蒸散量变化特征 | |
| 引用本文： | 辛蕙羽,王凯,杨新明,郑循华,陈权亮.半干旱夏季放牧草地能量收支和地表蒸散量变化特征[J].成都信息工程学院学报,2014,29(5):539-546. |
| 作者姓名： | 辛蕙羽 王凯 杨新明 郑循华 陈权亮 |
| 作者单位： | 1. 成都信息工程学院大气科学学院,高原大气与环境四川省重点实验室,四川成都610225;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029 2. 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029 3. 中国农业大学资源与环境学院,北京,100094 4. 成都信息工程学院大气科学学院,高原大气与环境四川省重点实验室,四川成都610225 |
| 基金项目： | 国家自然科学基金资助项目，农业部行业专项基金资助项目 |
| 摘 要： | 以半干旱区域典型夏季放牧草地为研究对象,采用涡动相关法,获取了2012年5月至2013年5月水汽和能量通量观测数据,分析夏季近地层能量收支特征、地表蒸散量变化及其气象控制因子。观测结果显示:生长季有效能量的分配以潜热通量为主,非生长季则以感热通量为主;地表蒸散日总量最大值为3.0mm,日蒸散量大小主要取决于土壤温度、气温和净辐射;降雨量的季节分布是地表蒸散量季节变化的一个重要的影响因子。 |
| 关 键 词： | 气象学 近地层能量收支 半干旱草地 涡动相关法 地表蒸散量 |
The Variation Characteristics of Surface Energy Budget and Evapotranspiration over a Summer Grazed Semi-arid Grassland |
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| XIN Hui-yu,WANG Kai,YANG Xin-ming,ZHENG Xun-hua,CHEN Quan-liang.The Variation Characteristics of Surface Energy Budget and Evapotranspiration over a Summer Grazed Semi-arid Grassland[J].Journal of Chengdu University of Information Technology,2014,29(5):539-546. | |
| Authors: | XIN Hui-yu WANG Kai YANG Xin-ming ZHENG Xun-hua CHEN Quan-liang |
| Institution: | XIN Hui-yu,WANG Kai,YANG Xin-ming,ZHENG Xun-hua,CHEN Quan-liang( 1.College of Atmospheric Science, Chengdu University of Information Technology, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu 610225, China; 2.State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics,Chinese Academy of Sciences, Beijing 100029,China; 3.College of Resources and Environmental Science, China Agricultural University, Beijing 100094,China) |
| Abstract: | In this study,surface water and energy fluxes were observed with the eddy covariance method over a typical summer grazed semi-arid grassland from May,2012 to May,2013,in order to study the characteristics of surface energy budget and the variation of evapotranspiration and its meteorological driving factors.The following results are given by this study.The latent heat flux made the largest contribution to the available energy during the growing season,whereas during the non-growing season,the largest contribution was from the sensible heat flux.The maximum daily evapotranspiration rate was 3.0 millimeter.The amount of evapotranspiration mainly depended on the soil temperature,air temperature and net radiation.The seasonal distribution of precipitation had an important effect on the seasonal variation of evapotranspiration. |
| Keywords: | meteorology surface energy budget semi-arid grassland eddy covariance method evapotranspiration |
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