Arid
Analysis of the Diurnal Pattern of Evaporative Fraction and Its Controlling Factors over Croplands in the Northern China
Yang Dawen; Chen He; Lei Huimin
来源期刊Journal of Integrative Agriculture
ISSN2095-3119
出版年2013
卷号12期号:8页码:1316-1329
英文摘要A key issue of applying remotely sensed data to estimate evapotranspiration (ET) for water management is extrapolating instantaneous latent heat flux (LE) at satellite over-passing time to daily ET total. At present, the most commonly used extrapolation methods have the same assumption that evaporative fraction (EF) can be treated as constant during daytime (so-called EF self-preservation). However, large errors are reported by many documents over various ecosystems with the same approach, which indicates that further analysis of the diurnal pattern of EF is still necessary. The aim of this study is to examine the diurnal pattern of EF under fair weather conditions, then to analyze the dependencies of EF to meteorological and plant factors. Long-term flux observations at four sites over semi-arid and semi-humid climate regions in the northern China are used to analyze the EF diurnal pattern. Results show that the EF self-preservation assumption no longer holds over growing seasons of crops. However, the ratio of reference ET to available energy is almost constant during the daytime, which implies the climate factors do not have much effect on the variability of EF. The analysis of diurnal pattern of air temperature, vapor pressure deficiency (VPD), and relative humidity (RH) confirms the assumption that ET diurnal pattern is mainly influenced by stomatal regulation.
英文关键词evaporative fraction daily evapotranspiration meteorological factor vegetation fraction northern China
类型Article
语种英语
开放获取类型Other Gold
收录类别CSCD
WOS研究方向Geology
CSCD记录号CSCD:4922168
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/335260
作者单位Yang Dawen, Department of Hydraulic Engineering, Tsinghua University, State Key Laboratory of Hydroscience and Engineering, Beijing 100084, China.; Chen He, Department of Hydraulic Engineering, Tsinghua University, State Key Laboratory of Hydroscience and Engineering, Beijing 100084, China.; Lei Huimin, Department of Hydraulic Engineering, Tsinghua University, State Key Laboratory of Hydroscience and Engineering, Beijing 100084, China.
推荐引用方式
GB/T 7714
Yang Dawen,Chen He,Lei Huimin. Analysis of the Diurnal Pattern of Evaporative Fraction and Its Controlling Factors over Croplands in the Northern China[J],2013,12(8):1316-1329.
APA Yang Dawen,Chen He,&Lei Huimin.(2013).Analysis of the Diurnal Pattern of Evaporative Fraction and Its Controlling Factors over Croplands in the Northern China.Journal of Integrative Agriculture,12(8),1316-1329.
MLA Yang Dawen,et al."Analysis of the Diurnal Pattern of Evaporative Fraction and Its Controlling Factors over Croplands in the Northern China".Journal of Integrative Agriculture 12.8(2013):1316-1329.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yang Dawen]的文章
[Chen He]的文章
[Lei Huimin]的文章
百度学术
百度学术中相似的文章
[Yang Dawen]的文章
[Chen He]的文章
[Lei Huimin]的文章
必应学术
必应学术中相似的文章
[Yang Dawen]的文章
[Chen He]的文章
[Lei Huimin]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。