Exploring the influence of environmental factors in partitioning evapotranspiration along an elevation gradient on Mount Gongga, eastern edge of the Qinghai-Tibet Platea, China

doi:10.1007/s11629-019-5687-1

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Exploring the influence of environmental factors in partitioning evapotranspiration along an elevation gradient on Mount Gongga, eastern edge of the Qinghai-Tibet Platea, China
	Sun Ju-ying 1,2; Sun Xiang-yang 2; Hu Zhao-yong 2; Wang Gen-xu 2
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:2 页码:384-396
关键词	Eddy covariance Water use efficiency Radiation Evapotranspiration components
ISSN号	1672-6316
DOI	10.1007/s11629-019-5687-1
通讯作者	Sun, Xiang-yang(sunxiangyang@imde.ac.cn) ; Wang, Gen-xu(wanggx@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	Evapotranspiration (ET) is a crucial part of the global hydrological cycle, and quantifying ET components is significant for understanding the global water cycle and energy balance. However, there is no consensus on the value of ET components, especially in topographic abrupt change zone, such as eastern margin of the Qinghai-Tibet Platea, where values of ET changes along the altitudinal gradients. Our aim is to explore the influencing factors in partitioning evapotranspiration and how ET components change with increasing elevations. A novel approach was proposed to estimate ET components by adding net solar radiation (Rn) instead of the vapor pressure deficit (VPD) into the underlying water use efficiency (uWUE) model based on one-year continuous measurements of flux data along the elevation gradient on Mount Gongga. Correlation analysis shows that the uWUE model's performance can be improved significantly by considering Rn instead of VPD, with correlation coefficients increasing by 35%-64%. The ratios of transpiration (T) to ET (T/ET) were 0.47, 0.48, 0.50 and 0.35 for the deciduous broadleaf forest (BF), mixed coniferous and deciduous broadleaf forest (MF), evergreen needle forest (ENF) and shrub land (SL), respectively. Leaf area index (LAI) and air temperature (Ta) were the two main controlling factors in determining T/ET during the growing season and at an annual scale, while Rn and Ta played more important roles during the dormant season. This study highlights the importance of incorporating Rn in partitioning evapotranspiration by using the water use efficiency (WUE) method in a humid mountainous region, which can improve the estimation of T/ET on a global scale.
电子版国际标准刊号	1993-0321
资助项目	National Natural Science Foundation of China[41401044] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC006]
WOS关键词	WATER-USE EFFICIENCY ; GROSS PRIMARY PRODUCTION ; TEMPORAL PATTERNS ; EDDY COVARIANCE ; STABLE-ISOTOPE ; ECOSYSTEM CO2 ; SAP-FLOW ; TRANSPIRATION ; FLUXES ; COMPONENTS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000512107000010
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33871]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Sun Xiang-yang; Wang Gen-xu
作者单位	1.University of Chinese Academy of Sciences, Beijing 100049, China 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
推荐引用方式 GB/T 7714	Sun Ju-ying,Sun Xiang-yang,Hu Zhao-yong,et al. Exploring the influence of environmental factors in partitioning evapotranspiration along an elevation gradient on Mount Gongga, eastern edge of the Qinghai-Tibet Platea, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(2):384-396.
APA	Sun Ju-ying,Sun Xiang-yang,Hu Zhao-yong,&Wang Gen-xu.(2020).Exploring the influence of environmental factors in partitioning evapotranspiration along an elevation gradient on Mount Gongga, eastern edge of the Qinghai-Tibet Platea, China.JOURNAL OF MOUNTAIN SCIENCE,17(2),384-396.
MLA	Sun Ju-ying,et al."Exploring the influence of environmental factors in partitioning evapotranspiration along an elevation gradient on Mount Gongga, eastern edge of the Qinghai-Tibet Platea, China".JOURNAL OF MOUNTAIN SCIENCE 17.2(2020):384-396.