Divergent environmental responses of long-term variations in evapotranspiration over four grassland ecosystems in China based on eddy-covariance measurements
文献类型：期刊论文
| 作者 | Zheng, Han5,10; Yu, Guirui1,6; Wang, Qiufeng1,6; Chen, Zhi1,4,6; Zhu, Xianjin3; Bao, Han2; Sun, Yuchen5; Niu, Panpan5; Li, Yingnian7; Shi, Peili1,6 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 625页码:17 |
| ISSN号 | 0022-1694 |
| 关键词 | Evapotranspiration Interannual variation Environmental response Surface conductance Eddy covariance China Grassland Transect |
| DOI | 10.1016/j.jhydrol.2023.130030 |
| 通讯作者 | Yu, Guirui(yugr@igsnrr.ac.cn) ; Wang, Qiufeng(qfwang@igsnrr.ac.cn) |
| 英文摘要 | Understanding the long-term variation in evapotranspiration (ET) for the spatially distributed grasslands is crucial for the accurate prediction of ET response to climate change. In this study, we analyzed the interannual variability (IAV) of ET and its responses to environmental conditions at four grassland ecosystems across a wide range of climatic and biome conditions based on the long-term (9-11 years) eddy-covariance measurements. The four ecosystems encompassed the most prevalent grassland vegetations in China, containing a typical temperate steppe, an alpine meadow-steppe, an alpine shrubland meadow, and an alpine marsh meadow. The IAVs of annual ET at the typical temperate steppe and the alpine meadow-steppe were primarily affected by either change in precipitation (P) or relative humidity (RH). Leaf area index (LAI) was the dominant factor controlling the IAVs of annual and growing-season ET at the alpine shrubland meadow, and the IAV of LAI was significantly correlated with P variation. As to the alpine marsh meadow, net radiation turned to be the dominant factor for the IAV of annual ET, additionally with significant effects from water supply condition (P and RH) on the IAV of growing-season ET. Similar environmental responses were also found for the IAVs of mean surface conductance (g(s)) across the sites. Specifically, annual and growing-season mean gs significantly increased with increases in LAI at the alpine shrubland meadow, and appeared to be more sensitive to changes in water availability and VPD at the typical temperate steppe and the alpine meadow-steppe. Significant linear relationships were also observed among the IAVs of mean Priestley-Taylor coefficient (alpha = ET/ETeq, where ETeq is the equilibrium evaporation), decoupling coefficient (Omega), and g(s) on both the annual and growing-season basis in this study. Moreover, the variabilities of annual mean g(s), Omega, and alpha further demonstrated the energy-limited conditions at the alpine marsh meadow, and the overall water-limited conditions at the other three grasslands. This study reveals the divergent environmental responses of long-term ET variations over grassland ecosystems, and contributes to the comprehensive understanding on the ET process and modeling efforts as well. |
| WOS关键词 | WATER-USE EFFICIENCY ; SURFACE HEAT-FLUX ; INTERANNUAL VARIABILITY ; TERRESTRIAL ECOSYSTEMS ; BIOPHYSICAL CONTROLS ; TALLGRASS PRAIRIE ; NORTHEAST CHINA ; TIBETAN PLATEAU ; ENERGY-EXCHANGE ; TYPICAL STEPPE |
| 资助项目 | National Natural Science Foundation of China[41971033] ; National Natural Science Foundation of China[32071585] ; National Natural Science Foundation of China[20220707] ; Young Talent Fund of Association for Science and Technology in Shaanxi, China[2019FY101300] ; National Science and Technology Basic Resources Survey Program of China[300102293207] ; Fundamental Research Funds for the Central Universities, CHD ; [32071586] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001057874700001 |
| 资助机构 | National Natural Science Foundation of China ; Young Talent Fund of Association for Science and Technology in Shaanxi, China ; National Science and Technology Basic Resources Survey Program of China ; Fundamental Research Funds for the Central Universities, CHD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196819]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yu, Guirui; Wang, Qiufeng |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Changan Univ, Sch Highway, Xian 710064, Peoples R China 3.Shenyang Agr Univ, Coll Agron, Shenyang 110161, Peoples R China 4.Univ Chinese Acad Sci, Beijing Yanshan Earth Crit Zone Natl Res Stn, Beijing, Peoples R China 5.Changan Univ, Sch Environm Sci & Engn, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effect Arid Reg, Xian 710054, Peoples R China 6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 7.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810001, Qinghai, Peoples R China 8.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 9.Ludong Univ, Sch Resources & Environm Engn, Yantai 264025, Peoples R China 10.State Key Lab Loess Sci, Xian 710054, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Han,Yu, Guirui,Wang, Qiufeng,et al. Divergent environmental responses of long-term variations in evapotranspiration over four grassland ecosystems in China based on eddy-covariance measurements[J]. JOURNAL OF HYDROLOGY,2023,625:17. |
| APA | Zheng, Han.,Yu, Guirui.,Wang, Qiufeng.,Chen, Zhi.,Zhu, Xianjin.,...&Niu, Zhongen.(2023).Divergent environmental responses of long-term variations in evapotranspiration over four grassland ecosystems in China based on eddy-covariance measurements.JOURNAL OF HYDROLOGY,625,17. |
| MLA | Zheng, Han,et al."Divergent environmental responses of long-term variations in evapotranspiration over four grassland ecosystems in China based on eddy-covariance measurements".JOURNAL OF HYDROLOGY 625(2023):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
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