秦巴山地植被绿度时空变化特征及归因  

Characteristics of Spatial and Temporal Changes in Vegetation Greenness and Its Attribution in Qinba Mountains

作　　者：白萌 黎明 莫淑红[3] 郭玲霞[1,2] 刘梦 李晓华 董莉丽[1,2] BAI Meng;LI Ming;MO Shuhong;GUO Lingxia;LIU Meng;LI Xiaohua;DONG Lili(School of Geography and Environment,Xianyang Normal University,Xianyang 712000,Shaanxi,China;Key Laboratory of Environmental Evolution and Ecological Restoration ofWeibei and Plateau,Xianyang 712000,Shaanxi,China;School ofWater Resources and Hydropower,Xi’an University of Technology,Xi’an 710048,Shaanxi,China)

机构地区：[1]咸阳师范学院地理与环境学院,陕西咸阳712000 [2]咸阳市渭北旱塬环境演变与生态修复重点实验室,陕西咸阳712000 [3]西安理工大学水利水电学院,陕西西安710048

出　　处：《咸阳师范学院学报》2025年第2期36-44,共9页Journal of Xianyang Normal University

基　　金：国家自然科学基金项目(2179024);陕西省教育厅科学研究计划重点项目(24JZ073);陕西省“十四五”教育科学规划课题(SGH24Y3028);陕西省哲学社会科学研究项目(2024QN258);国家级大学生创新创业训练计划项目(D202306141949446705)。

摘　　要：秦岭—大巴山是中国北亚热带向暖温带过渡的重要地段,兼具两种气候带的自然地理特征,区域植被对气候变化的响应具有典型性。基于MODIS-NDVI数据,采用趋势分析、偏相关分析及贡献分析等方法,对秦巴山地2000—2020年以来植被绿度的时空变化特征进行研究,揭示研究区不同区域植被绿度变化的主导驱动因素。结果表明:(1)2000—2020年秦巴山地NDVI呈显著上升趋势,增速为2.6%/10 a,空间上呈“秦岭东段和西段低、中段高,大巴山北坡高、南坡相对较低”的分布格局。(2)秦巴山地NDVI表现出显著的垂直分带特征。随着海拔高度的增加,NDVI表现出先增加后减小的特征,峰值出现在海拔1 500 m附近。(3)气候因子对NDVI的作用存在明显的空间差异,以气温、降水和日照时数为主导驱动因素的区域分别占42.78%、27.06%和29.76%。(4)人类活动对NDVI的影响以正向作用为主,秦巴山地67.85%的区域属气候和人类活动共同主导NDVI上升。(5)秦巴山地NDVI变化受气候变化和人类活动共同影响,其中气候变化的影响更为显著。The Qinling-Daba Mountains,QDM:serve as the important parts of the transition from northern subtropical zone to warm temperate zone in China.The QDM have the natural geographical characteristics of both climatic zones,and the response of regional vegetation to climate change is typical.Based on MODIS-NDVI data,trend analysis,partial correlation analysis and contribution analysis were used to explore the spatiotemporal change characteristics of vegetation greenness in the QDM from 2000 to 2020,revealing the dominant driving factors of vegetation greenness changes in different regions across the QDM.Results show that.(1)NDVI in the QDM shows a significant upward trend from 2000 to 2020,with a growth rate of 2.6%/10 a,showing a spatial pattern of“lower in the eastern and western Qinling Mountains,higher in the middle,higher in the north slope and lower in the south slope of the Daba Mountains”.(2)NDVI in the QDM show significant vertical zoning characteristics.As the altitude increases,NDVI first increases and then decreases,with the peak occurring near 1 500 m above sea level.(3)There are obvious spatial differences in the effect of climate factors on NDVI.The regions where air temperature,precipitation and sunshine duration dominates NDVI account for42.78%,27.06% and 29.76% of the QDM,respectively.(4)The influence of human activities on NDVI is mainly positive.Climate change and human activities jointly dominate the increase in NDVI in67.85% of the QDM(.5)The changes in NDVI in the QDM are affected by both climate change and human activities,among which the impact of climate change is more significant.

关 键 词：秦巴山地 植被绿度 MODIS-NDVI 偏相关分析 贡献分析 

分 类 号：K903[历史地理—人文地理学]