Climatic and biotic controls of evapotranspiration across grassland ecosystems on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Peng, Siyuan4,5,6; Yang, Yue4; Luo, Dengnan6,7; Zeng, Xiang8; Liang, Minqi9; Tao, Long8; Zhang, Guangru8; Li, Pan8; Liao, Weijie4; Guo, Qun3,10 |
| 刊名 | JOURNAL OF HYDROLOGY-REGIONAL STUDIES
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 61页码:102747 |
| 关键词 | Evapotranspiration SWH Tibetan Plateau Spatial variation Water supply Energy demand |
| DOI | 10.1016/j.ejrh.2025.102747 |
| 产权排序 | 7 |
| 文献子类 | Article |
| 英文摘要 | Study region: The Tibetan Plateau in China, the Third Pole of the world. Study focus: Accurate descriptions of spatial variation in evapotranspiration (ET) and its components on the Tibetan Plateau (TP) are crucial for understanding the dynamics of the regional water cycle and energy balance. However, how various environmental factors affect ET and its components remains unclear. This study addresses this gap using observational data from 14 sites and employing the Shuttleworth-Wallace-Hu (SWH) model to examine the spatial relationships between ET, its components, and underlying drivers. New hydrological insights for the region: The SWH model parameters were optimized using the Monte Carlo method, achieving a satisfactory model performance with an average R2 of 0.75. The ratio of transpiration to ET was generally higher in alpine meadows (0.55) than alpine steppes (0.39). Across the TP, precipitation and the leaf area index together shaped spatial variation in ET and transpiration. Precipitation emerged as the primary driver of interannual variation in ET, while the leaf area index strongly regulated the proportion of ET accounted for by transpiration. Furthermore, above aridity index values of 0.73, grassland ecosystems transitioned from water to energy. This finding is significant as it challenges the common application of an aridity index value of 0.65 to distinguish arid from humid regions. It suggests that TP grasslands, with an AI of 0.65-0.73, remain primarily water-limited. This insight is crucial for understanding water-energy dynamics in similar ecosystems, calling into question the conventional binary categorization of arid versus humid areas. These findings advance our understanding of the complex land-atmosphere interactions within the global water cycle. |
| URL标识 | 查看原文 |
| WOS关键词 | SOIL-MOISTURE ; TERRESTRIAL EVAPOTRANSPIRATION ; SPATIOTEMPORAL VARIATIONS ; TEMPERATURE-DEPENDENCE ; VEGETATION CONTROL ; USE EFFICIENCY ; WATER-BALANCE ; TRANSPIRATION ; MODEL ; EVAPORATION |
| WOS研究方向 | Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001566419200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/216061]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Hu, Zhongmin |
| 作者单位 | 1.Nanjing Univ, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Key Lab Land Satellite Remote Sensing Applicat, Minist Nat Resources,Sch Geog & Ocean Sci, Nanjing 210023, Jiangsu, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China; 4.Hainan Univ, Sch Ecol, Hainan Baoting Trop Forest Ecosyst Observat & Res, Haikou 570228, Peoples R China; 5.Beijing Normal Univ, Fac Arts & Sci, Dept Geog, Zhuhai 519087, Peoples R China; 6.Beijing Normal Univ, Facil Geog Sci, Beijing 100875, Peoples R China; 7.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Zhuhai Branch, Zhuhai 519087, Peoples R China; 8.South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China; 9.Sun Yat Sen Univ, Guangdong Prov Data Ctr Terr & Marine Ecosyst, Sch Atmospher Sci, Zhuhai 510245, Guangdong, Peoples R China; 10.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Peng, Siyuan,Yang, Yue,Luo, Dengnan,et al. Climatic and biotic controls of evapotranspiration across grassland ecosystems on the Tibetan Plateau[J]. JOURNAL OF HYDROLOGY-REGIONAL STUDIES,2025,61:102747. |
| APA | Peng, Siyuan.,Yang, Yue.,Luo, Dengnan.,Zeng, Xiang.,Liang, Minqi.,...&Hu, Zhongmin.(2025).Climatic and biotic controls of evapotranspiration across grassland ecosystems on the Tibetan Plateau.JOURNAL OF HYDROLOGY-REGIONAL STUDIES,61,102747. |
| MLA | Peng, Siyuan,et al."Climatic and biotic controls of evapotranspiration across grassland ecosystems on the Tibetan Plateau".JOURNAL OF HYDROLOGY-REGIONAL STUDIES 61(2025):102747. |
入库方式： OAI收割
来源：地理科学与资源研究所
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