首页 | 本学科首页   官方微博 | 高级检索  
     检索      

北京市参考作物蒸散量的时空分布特征
引用本文:段永红,陶澍,李本纲.北京市参考作物蒸散量的时空分布特征[J].中国农业气象,2004,25(2):22-25.
作者姓名:段永红  陶澍  李本纲
作者单位:北京大学环境学院地表过程分析与模拟教育部重点实验室,北京,100871
基金项目:国家自然科学基金 (4 0 0 310 10,4 0 0 2 4 10 1)资助
摘    要:利用北京市各气象站点的长期观测资料,使用FAO推荐的Penman-Monteith法,计算了各站点逐月参考作物蒸散量ET0。在此基础上使用插值生成ET0的灰度分布图与等值线图,分析了ET0的时空分布特征。研究结果发现,北京市ET0分布具有2个常年稳定的低蒸发中心及多个随季节变化的高蒸发中心。区域内海拔高度与地形变化造成地表温度和热量平衡变化是导致ET0时空变化特征的主导因素;风速、日照时数和相对湿度等气象因素及其综合作用对ET0也有较大的影响。

关 键 词:北京  参考作物蒸散量  时空分布特征  Penman-Monteith法  海拔  地形  地理信息系统

Spatial and Temporal Variation of Reference Crop Evapotranspiration in Beijing
DUAN Yong-hong,TAO Shu,LI Ben-gang.Spatial and Temporal Variation of Reference Crop Evapotranspiration in Beijing[J].Chinese Journal of Agrometeorology,2004,25(2):22-25.
Authors:DUAN Yong-hong  TAO Shu  LI Ben-gang
Abstract:Based on the long-term observed data of meteorological stations in Beijing, the reference crop evapotranspirations (ET_0) for each month and each station were calculated, by using Penman-Monteith method recommended by the FAO. The spatial analysis module in Arcview was employed for data interpolation and grayscale mapping. There are two throughout year steady low evapotranspiration centers and several high evapotranspiration centers varied with the seasons. The elevation and topography led to change in surface temperature and heat balance are the main reasons for the temporal and spatial distribution changes of ET_0 in Beijing. The meteorological factors, such as wind velocity, duration of sunshine and relative humidity, and its interaction have a big influence on ET_0 as well.
Keywords:Penman-Monteith method  Reference crop evapotranspirations (ET_0)  GIS
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号