干旱区生态环境知识资源中心(Arid): Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China

Arid

DOI	10.1016/j.agwat.2018.10.032
	Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China
	Rahman, Md Masudur 1,2; Zhang, Wanchang 1; Wang, Kai 3
通讯作者	Zhang, Wanchang
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	213 页码:245-259
英文摘要	The processes of surface energy and water exchange are significantly necessary to the forming and evolution of regional climate. The most critical issues and challenges are 1) dynamics of surface energy balance components, 2) the surface energy imbalance problem, which is still unsolved and 3) energy partitioning in an ecosystem. This study assessed the seasonal and annual variations of the surface energy fluxes, the surface energy balance closure (EBC), the reasons behind the surface energy imbalance, and energy partitioning based on the two years (2014-2015) flux observation datasets over a semi-arid agricultural region in north China. The estimation of surface fluxes was also examined using satellite data. The EBC analysis was carried out using the ordinary least square (01.5) regression model of the dependent turbulent fluxes against the independently available energy and the energy balance ratio (EBR). The results revealed that the EBC ranged from 0.63 to 0.78 at all respects with an overall EBC of 0.74, and the daily EBC was better than 30-min averages. The identified main reasons behind this imbalance were 1) the ignorance of the heat storage terms (soil and canopy), which improved the EBC by approximately 7%; 2) the vegetation and surface heterogeneity negatively affected the EBR; and 3) the occurrence of advection broke the energy balance by decreasing EBC. The energy partitioning was investigated using the residual method and two ratios (sensible heat flux/net radiation and latent heat flux/net radiation). The results showed that the sensible heat flux was dominating during dry periods and the latent heat flux was dominating during the wet periods, and the rate of dominance was controlled by the availability of water, vegetation dynamics and weather conditions.
英文关键词	Net solar radiation Turbulent fluxes Available energy Evapotranspiration Ordinary least square Energy balance ratio
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000457952700024
WOS关键词	BALANCE SYSTEM SEBS ; EDDY-COVARIANCE ; LAND-SURFACE ; WATER-VAPOR ; INTERANNUAL VARIABILITY ; CARBON-DIOXIDE ; FLUX DATA ; CLOSURE ; FOREST ; EXCHANGE
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国科学院大气物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213984
作者单位	1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Rahman, Md Masudur,Zhang, Wanchang,Wang, Kai. Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China[J]. 中国科学院大气物理研究所,2019,213:245-259.
APA	Rahman, Md Masudur,Zhang, Wanchang,&Wang, Kai.(2019).Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China.AGRICULTURAL WATER MANAGEMENT,213,245-259.
MLA	Rahman, Md Masudur,et al."Assessment on surface energy imbalance and energy partitioning using ground and satellite data over a semi-arid agricultural region in north China".AGRICULTURAL WATER MANAGEMENT 213(2019):245-259.