Gao Jianlun,Wang Jingjing,Bai Yue,et al.The influence of the Grain for Green Project on climate change in Shaanxi Province and its driving mechanism[J].Research of Soil and Water Conservation,2025,32(02):150-157.[doi:10.13869/j.cnki.rswc.2025.02.035]
退耕还林工程对陕西省气候的影响及其驱动机制
- Title:
- The influence of the Grain for Green Project on climate change in Shaanxi Province and its driving mechanism
- 文章编号:
- 1005-3409(2025)02-0150-08
- Keywords:
- Grain for Green Project; precipitation; temperature; feedback effects; vegetation restoration
- 分类号:
- P951
- 文献标志码:
- A
- 摘要:
- [目的]研究陕西省植被恢复对区域气候的影响及其驱动机制,能够为深入认识西北地区气候变化对植被恢复的响应机制提供理论依据。[方法]基于陕西省气象站点实测数据和卫星遥感数据,采用观测资料减去再分析法(OMR)和土地利用转移矩阵等方法,对比分析了陕西省不同地形下垫面退耕还林(草)工程实施前后(1980—1999年和2000—2017年)降水和气温的年际变化差异,讨论了植被恢复对气候反馈效应的驱动机制。[结果]退耕还林(草)工程实施后,陕西省年降水量增加,平均气温和最高气温增温趋势减缓。植被覆盖度增加引起的地表蒸散发和潜热通量变化是造成该区年降水增加和增温减缓的主要驱动因子,但其对年降水量和气温的影响因地形下垫面的不同而存在差异。[结论]植被恢复主要通过调控地表蒸散发和潜热通量影响陕西省气候变化,并且其对气候的影响因地形下垫面的不同而存在差异。
- Abstract:
- [Objective]The aims of this study are to examine the feedback effect of vegetation restoration on climate and its driving mechanism in Shaanxi Province, and to provide scientific basis for a deeper understanding of the response mechanism of climate change to vegetation restoration in northwest China. [Methods]Based on the measured data from meteorological stations and satellite remote sensing data in Shaanxi Province, we used the methods of Observation Minus Reanalysis(OMR)and land use transfer matrix to compare the interannual differences of precipitation and temperature in different terrain surface pattern before and after the Grain for Green Project of Shaanxi(1980—1999 and 2000—2017). Then, the mechanisms driving of the climate feedback effects were discussed under vegetation restoration. [Results]The implementation of the Grain for Green Project had led to an increase in annual precipitation and a decrease in the warming trend of average and maximum temperatures in Shaanxi Province. Changes in surface evapotranspiration and latent heat fluxes due to the increased vegetation cover were the primary drivers of the increase in annual precipitation and the slowing down of temperature, but its effect on annual precipitation and temperature varied according to the topographic subsurface. [Conclusion]Vegetation restoration affects climate change in Shaanxi Province mainly by regulating surface evapotranspiration and latent heat fluxes, and its impact on climate varies according to the topographic subsurface.
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备注/Memo
收稿日期:2024-05-18 修回日期:2024-07-22 接受日期:2024-08-03
资助项目:中国科学院战略性先导科技专项“侵蚀驱动的水碳氮耦合机理和模型模拟”(XDB40020305)
第一作者:高建伦(1983—),男,陕西子洲人,学士,工程师,主要从事生态气象研究。E-mail:JLgao1116@163.com
通信作者:魏孝荣(1978—),男,陕西武功人,博士,研究员,主要从事土壤物质循环研究。E-mail:xrwei78@163.com