Assessment on the influence of environmental changes on hydrothermal processes in extremely arid inland basins: Evidence from remote sensing data

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies Pub Date : 2025-09-30 DOI:10.1016/j.ejrh.2025.102817

Xudong Zhang , Congjian Sun , Wei Chen

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引用次数: 0

Abstract

Study region

the Tarim River Basin (TRB), China.

Study focus

We based on surface hydrothermal data, along with LUCC and major environmental factors from three ecosystems in the mountain, oasis, and desert regions of the TRB from 1990 to 2022, and investigated the response of surface hydrothermal processes in different ecosystems to LUCC and climate change.

New insights into the response of surface hydrothermal processes in different ecosystems to LUCC and climate change

Significant expansion of cropland and impervious areas occurred in the oasis regions (+15,091.2 km² and +2329.7 km², respectively), primarily through conversion of grasslands and barren lands. Glacier/snow areas of the mountains region reduction (-1192.7 km²), while desert regions showed enhanced land utilization with barren land decrease (-1366.3 km²). (2) Regional land surface temperature (LST) demonstrated an upward trend (P < 0.01). Soil moisture (SM) declined significantly, particularly in the winter of the oases region (-0.0006 m³/m³ yr⁻¹, P < 0.05). Except for the mountain area, the actual evapotranspiration (AET) showed a downward trend. (3) Conversion to forests/grasslands significantly suppressed regional LST increasing, decelerated SM decline, and enhanced AET. Conversely, conversion to impervious areas intensified regional LST rising and SM depletion. (4) Hydrothermal drivers exhibited significant spatiotemporal heterogeneity. Solar radiation (SRAD) dominated regional LST variability (70.7 % summer explanatory power in mountainous regions), PRE governed regional AET variability (exceeding 80 % explanatory power in oasis regions), and regional SM was jointly controlled by regional LST and PRE. The results of this study will provide a crucial scientific basis for regional ecological protection and climate change response.

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评价极端干旱内陆盆地环境变化对热液过程的影响：来自遥感数据的证据

研究区域：中国塔里木河流域。基于1990 - 2022年青藏高原山地、绿洲和荒漠3个生态系统地表热液数据，结合土地利用变化和主要环境因子，研究了不同生态系统地表热液过程对土地利用变化和气候变化的响应。不同生态系统地表热液过程对土地覆盖变化和气候变化响应的新认识绿洲区耕地和不透水面积的扩张（分别为+15,091.2 km2和+2329.7 km2）主要通过草地和荒地的转化而实现。山区冰川/积雪面积减少（-1192.7 km2），荒漠地区土地利用增强，荒地面积减少（-1366.3 km2）。(2)区域地表温度（LST）呈上升趋势（P <； 0.01）。土壤水分（SM）显著下降，特别是在绿洲地区冬季（-0.0006 m3/m3年−1，P <； 0.05）。除山区外，实际蒸散发呈下降趋势。(3)森林/草地显著抑制了区域地表温度的增加，减缓了SM的下降，增强了AET。相反，向不透水地区的转变加剧了区域LST上升和SM耗竭。(4)热液驱动因素具有明显的时空异质性。太阳辐射（SRAD）主导区域地表温度变率（山地夏季解释力为70.7 %），PRE主导区域AET变率（绿洲地区解释力超过80 %），区域SM受区域地表温度和PRE共同控制。研究结果将为区域生态保护和应对气候变化提供重要的科学依据。

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来源期刊

Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)

CiteScore

6.70

自引率

8.50%

发文量

284

审稿时长

60 days

期刊介绍： Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.