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Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains

文献类型：期刊论文

作者Li, Hongyu3,4,5; Liu, Xiaohuang3,5; Zhang, Wenbo3,4,5; Zhu, Haoyang2; Zhao, Xiaofeng3,4,5; Liu, Jiufen3,4,5; Luo, Xinping1,3,5; Wang, Ran3,4,5; Zhao, Honghui3,5; Wang, Chao3,5
刊名WATER
出版日期2024-05-01
卷号16期号:9页码:21
关键词evapotranspiration sensitivity elevational gradient dryland mountains forest multi-source analysis environmental control
DOI10.3390/w16091252
英文摘要Elevational climatic heterogeneity, complex terrains, and varying subsurface properties affect the sensitivity of evapotranspiration (ET) in dryland mountain forests to hydrometeorological changes. However, the elevational distribution of ET sensitivity and its major influencing factors remain poorly understood. This study focused on the mid-altitude zone (1000-3500 m) forests in the Chinese Western Tianshan Mountains and assessed ET sensitivity to multiple climate variables, including precipitation (P) and potential evapotranspiration (PET), from 2000 to 2020. To evaluate the multi-year mean and trends in ET sensitivity, multi-source remote sensing data and regional survey data were analyzed using Spearman's correlation coefficient, the sliding window method, and Kendall's test. Furthermore, the relative importance of environmental variables (topography, geology, soil, and vegetation) was investigated. P and PET showed no significant trends, while ET exhibited a significant increasing trend (5.81 mm/yr, p < 0.01), particularly at elevations above 2000 m. Most forests (93.5%) showed a positive sensitivity of ET to P, and 70.0% showed a positive sensitivity of ET to PET, mainly at elevations of 1500-2500 m. Additionally, the trend in ET sensitivity to P decreased with an increasing elevation, with 64.5% showing a positive trend. Meanwhile, the trend in ET sensitivity to PET increased with elevation, with 88.1% showing a positive trend. Notably, 53.2% of the forests showed increasing ET sensitivity trends to both P and PET, primarily at elevations of 2000-3000 m with a mean normalized difference vegetation index (NDVI) of 0.56. Geological factors, particularly the hydrological properties of weathered bedrock, contributed the most (similar to 47%) to mean sensitivity. However, geological and vegetative factors, including the NDVI and root zone water availability, were the main contributors (35% each) to the sensitivity. This study highlights the elevation-dependent sensitivity of dryland mountain forests to hydrothermal changes, with higher-elevation forests (>2000 m) being more sensitive to global warming.
WOS关键词POTENTIAL EVAPOTRANSPIRATION ; CHINA ; PRECIPITATION ; VEGETATION ; MOISTURE ; IMPACTS ; REGIONS ; STORAGE
资助项目Science and Technology Innovation Fund of the Comprehensive Survey and Command Center for Natural Resources, China Geological Survey
WOS研究方向Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:001220669300001
出版者MDPI
资助机构Science and Technology Innovation Fund of the Comprehensive Survey and Command Center for Natural Resources, China Geological Survey
源URL[http://ir.igsnrr.ac.cn/handle/311030/205655]  
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Liu, Xiaohuang
作者单位1.CAGS, Inst Geophys & Geochem Explorat, Key Lab Geochem Explorat, Langfang 065000, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Minist Nat Resources, Key Lab Coupling Proc & Effect Nat Resources Eleme, Beijing 100055, Peoples R China
4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
5.China Geol Survey, Comprehens Survey Command Ctr Nat Resources, Beijing 100055, Peoples R China
推荐引用方式
GB/T 7714		 Li, Hongyu,Liu, Xiaohuang,Zhang, Wenbo,et al. Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains[J]. WATER,2024,16(9):21.
APA Li, Hongyu.,Liu, Xiaohuang.,Zhang, Wenbo.,Zhu, Haoyang.,Zhao, Xiaofeng.,...&Wang, Chao.(2024).Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains.WATER,16(9),21.
MLA Li, Hongyu,et al."Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains".WATER 16.9(2024):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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