Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains DOI Open Access
Hongyu Li, Xiaohuang Liu, Wenbo Zhang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1252 - 1252

Published: April 27, 2024

Elevational climatic heterogeneity, complex terrains, and varying subsurface properties affect the sensitivity of evapotranspiration (ET) in dryland mountain forests to hydrometeorological changes. However, elevational distribution ET its major influencing factors remain poorly understood. This study focused on mid-altitude zone (1000–3500 m) Chinese Western Tianshan Mountains assessed multiple climate variables, including precipitation (P) potential (PET), from 2000 2020. To evaluate multi-year mean trends sensitivity, multi-source remote sensing data regional survey were analyzed using Spearman’s correlation coefficient, sliding window method, Kendall’s test. Furthermore, relative importance environmental variables (topography, geology, soil, vegetation) was investigated. P PET showed no significant trends, while exhibited a increasing trend (5.81 mm/yr, p < 0.01), particularly at elevations above m. Most (93.5%) positive P, 70.0% PET, mainly 1500–2500 Additionally, decreased with an elevation, 64.5% showing trend. Meanwhile, increased 88.1% Notably, 53.2% both primarily 2000–3000 m normalized difference vegetation index (NDVI) 0.56. Geological factors, hydrological weathered bedrock, contributed most (~47%) sensitivity. geological vegetative NDVI root water availability, main contributors (35% each) highlights elevation-dependent hydrothermal changes, higher-elevation (>2000 being more sensitive global warming.

Language: Английский

A technical framework for determining water consumption thresholds in the semi-arid Xiliao River Plain based on terrestrial water balance DOI Creative Commons

Xuanxuan Wang,

Huan Liu,

Yangwen Jia

et al.

Journal of Hydrology Regional Studies, Journal Year: 2025, Volume and Issue: 58, P. 102261 - 102261

Published: Feb. 26, 2025

Language: Английский

Citations

0
Changes in Vegetation Phenology and Water Use Efficiency Driven by Warming and Wetting in Northwest China DOI
Wenqing Zhang,

Yanling Bai,

Liu Liu

et al.

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(3)

Published: March 1, 2025

ABSTRACT Vegetation phenology is a key indicator of climate change and plays vital role in ecosystem water use efficiency (WUE), which balances carbon sequestration loss. As global accelerates, understanding its effects on WUE essential for comprehending dynamics carbon–water cycles. Northwest China (NWC), one the driest regions at similar latitudes, experiencing rapid shift from warm‐dry to warm‐wet climate, posing significant challenges fragile ecosystem. In this study, we used reanalysis satellite remote sensing datasets analyse changes start growing season (SOS), end (EOS) length (LOS) various vegetation types NWC 1982 2015. The focus was how temperature precipitation variations influenced phenological their subsequent impacts Gross Primary Productivity (GPP), evapotranspiration (ET) WUE. Our results show that has experienced warming wetting trend, with SOS advancing by 0.04 days per year EOS delaying year, leading notable extension LOS 0.08 annually. Temperature primarily drives advance, while croplands grasslands shifts forests shrublands dictate delays. increased rate 0.005 gC m −2 mm −1 , influencing GPP ET both directly indirectly through changes. findings underscore cascading Changes have had fluxes, varying across different types. This study provides valuable insights into response mechanisms arid semi‐arid offers critical information sustainable management resources agriculture NWC.

Language: Английский

Citations

0
Earlier vegetation green-up is intensifying hydrological drought in the Tianshan Mountain basins DOI
Lilin Zheng, Ruishan Chen, Jianhua Xu

et al.

Journal of Hydrology Regional Studies, Journal Year: 2025, Volume and Issue: 59, P. 102321 - 102321

Published: March 22, 2025

Language: Английский

Citations

0
Elevational Patterns of Forest Evapotranspiration and Its Sensitivity to Climatic Variation in Dryland Mountains DOI Open Access
Hongyu Li, Xiaohuang Liu, Wenbo Zhang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1252 - 1252

Published: April 27, 2024

Elevational climatic heterogeneity, complex terrains, and varying subsurface properties affect the sensitivity of evapotranspiration (ET) in dryland mountain forests to hydrometeorological changes. However, elevational distribution ET its major influencing factors remain poorly understood. This study focused on mid-altitude zone (1000–3500 m) Chinese Western Tianshan Mountains assessed multiple climate variables, including precipitation (P) potential (PET), from 2000 2020. To evaluate multi-year mean trends sensitivity, multi-source remote sensing data regional survey were analyzed using Spearman’s correlation coefficient, sliding window method, Kendall’s test. Furthermore, relative importance environmental variables (topography, geology, soil, vegetation) was investigated. P PET showed no significant trends, while exhibited a increasing trend (5.81 mm/yr, p < 0.01), particularly at elevations above m. Most (93.5%) positive P, 70.0% PET, mainly 1500–2500 Additionally, decreased with an elevation, 64.5% showing trend. Meanwhile, increased 88.1% Notably, 53.2% both primarily 2000–3000 m normalized difference vegetation index (NDVI) 0.56. Geological factors, hydrological weathered bedrock, contributed most (~47%) sensitivity. geological vegetative NDVI root water availability, main contributors (35% each) highlights elevation-dependent hydrothermal changes, higher-elevation (>2000 being more sensitive global warming.

Language: Английский

Citations

1