摘要
探析黄土高原植被覆盖演变及其驱动因素,有助于了解黄土高原生态现状。本研究以MOD13A2为主要数据源,采用像元二分模型、趋势分析法和相关性分析法对黄土高原地区植被覆盖度动态变化和驱动力进行分析。结果表明:(1)2000-2020年整体植被覆盖度呈上升趋势,其增速为0.005/a(p<0.01)。其中,2000-2010年增速为0.006/a,2010-2020年增速为0.004/a;(2)2000-2020年植被FVC整体呈现从东南向西北逐渐递减的分布,但不同地区的变化趋势存在差异;(3)进一步分析表明,降水是黄土高原植被变化的主要驱动因素。
Exploring the evolution of vegetation cover and its drivers in the Loess Plateau helps to understand the ecological status of the Loess Plateau.In this study,MOD13A2 was used as the main data source,and the dynamic changes and drivers of vegetation cover in the Loess Plateau region were analyzed using the like element dichotomous model,trend analysis method and correlation analysis method.The results showed that(1)the overall vegetation cover showed an increasing trend from 2000 to 2020,and its growth rate was 0.005/a(p<0.01).Among them,the growth rate was 0.006/a from 2000 to 2010 and 0.004/a from 2010 to 2020;(2)the overall vegetation FVC showed a gradual decreasing distribution from southeast to northwest from 2000 to 2020,but there were differences in the change trends in different regions;(3)further analysis showed that precipitation was the main driving factor of vegetation change in the Loess Plateau.
作者
崔涵
刘喆
Cui Han;Liu Zhe(Northwest Surveying and Planning Institute of National Forestry and Grassland Administration,Xi'an 710048,China)
出处
《林业科技情报》
2023年第3期1-3,共3页
Forestry Science and Technology Information
基金
国家林草局西北院自主创新课题计划“无人机林草资源智能监管系统关键技术与标准研究”(XBY-KJCX-2021-21)。
关键词
黄土高原
植被覆盖度
动态变化
遥感数据
Loess Plateau
fractional vegetation cover
dynamic change
remote sensing data
