北方农牧交错带植被恢复对区域陆气相互作用和水循环的影响
收稿日期: 2025-03-24
修回日期: 2025-05-12
网络出版日期: 2025-08-22
基金资助
国家自然科学基金项目(42030501);国家自然科学基金项目(42401011);甘肃省自然科学基金项目(25JRRA662)
Impacts of Vegetation Restoration in the Agro-Pastoral Ecotone of Northern China on Regional Land-Atmosphere Interactions and Hydrological Cycle
Received date: 2025-03-24
Revised date: 2025-05-12
Online published: 2025-08-22
Supported by
the National Natural Science Foundation of China(42030501);The National Natural Science Foundation of Gansu(25JRRA662)
北方农牧交错带是我国农牧业协同发展核心区和生态安全屏障。植被恢复显著改变了该区生态环境和水文气候状况，但现有研究对其影响过程和机制尚未充分阐明。利用遥感和再分析数据，结合WRF-tagging模型，探究了北方农牧交错带植被恢复对区域陆气相互作用和水循环的影响。结果表明：①北方农牧交错带2000—2015年植被指数呈显著增加趋势，陆地生态系统的固碳能力逐渐提升，水分利用效率整体表现为增加趋势。②植被恢复使得该区域蒸散发显著增加，并通过水分再循环过程贡献了北方农牧交错带降水的10.8%，北方农牧交错带降水再循环率呈显著增加趋势，表明植被恢复通过增强区域水分再循环过程增加了对本地降水的贡献；东亚夏季风和中纬度西风的协同作用主导北方农牧交错带生长季蒸散发水汽输送，植被恢复通过植被蒸腾作用增加了区域水汽通量，提升了降水形成过程中再循环水汽比例，促进降水再循环过程，对下风向区域降水产生积极作用。③植被恢复通过降低反照率，以增加净辐射吸收、提升边界层湍流动能、促进水汽垂直混合；并通过增加蒸散发与水平流入水汽输入来提高大气湿度、降低抬升凝结高度等，协同改变湿静能与对流有效势能，最终触发深层对流发展，进而改变区域降水效率及降水。研究可为农牧交错带植被恢复可持续建设和水资源安全提供科学支撑。
王学锦 , 张宝庆 , 贺缠生 . 北方农牧交错带植被恢复对区域陆气相互作用和水循环的影响[J]. 地球科学进展, 2025 , 40(7) : 737 -752 . DOI: 10.11867/j.issn.1001-8166.2025.049
The Agro-Pastoral Ecotone of Northern China (APENC) serves as both a core area for grain and livestock production and a critical ecological barrier in northern China. Vegetation restoration has significantly changed the ecological environment and hydrometeorological conditions of the APENC; however, existing studies have not fully elucidated its impact processes and mechanisms. The results demonstrated significant upward trends in the Leaf Area Index (LAI) and Normalized Difference Vegetation Index (NDVI) across the APENC during 2000-2015, accompanied by an improved carbon sequestration capacity in terrestrial ecosystems and an overall increase in water use efficiency. Large-scale restoration projects have amplified evapotranspiration (ET) in most APENC regions, with enhanced ET-derived moisture contributing to 10.8% of precipitation through hydrological recycling processes. A pronounced increase in the Precipitation Recycling Ratio (PRR) was observed in APENC, indicating that vegetation restoration intensified the regional hydrological cycling to augment local precipitation. Synergistic effects between the East Asian summer monsoon and mid-latitude westerlies dominate evaporated moisture transport during the growing seasons. Vegetation restoration amplifies the regional vapor flux through enhanced transpiration, elevates the recycled moisture proportion in precipitation formation, and produces positive feedback on precipitation via intensified moisture recycling processes, making substantial contributions to precipitation in downwind regions. Vegetation restoration alters precipitation patterns through two synergistic mechanisms:
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