IMHE OpenIR  > 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-ying1,2; Sun Xiang-yang1; Hu Zhao-yong1; Wang Gen-xu1
Corresponding AuthorSun, Xiang-yang(sunxiangyang@imde.ac.cn) ; Wang, Gen-xu(wanggx@imde.ac.cn)
2020
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume17Issue:2Pages:384-396
SubtypeArticle
Contribution Rank1
AbstractEvapotranspiration (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.
KeywordEddy covariance Water use efficiency Radiation Evapotranspiration components
DOI10.1007/s11629-019-5687-1
Indexed BySCI
WOS KeywordWATER-USE EFFICIENCY ; GROSS PRIMARY PRODUCTION ; TEMPORAL PATTERNS ; EDDY COVARIANCE ; STABLE-ISOTOPE ; ECOSYSTEM CO2 ; SAP-FLOW ; TRANSPIRATION ; FLUXES ; COMPONENTS
Language英语
Funding ProjectNational Natural Science Foundation of China[41401044] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC006]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000512107000010
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33871
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorSun Xiang-yang; Wang Gen-xu
Affiliation1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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