2000-2017年福建省植被NDVI变化特征

摘要

[目的/意义]通过对福建省2000-2017年植被NDVI的变化特点进行分析, 从宏观上研究福建省植被覆盖的变化情况及趋势特征.[方法/过程]使用ArcGIS和Excel软件, 通过趋势线分析法、稳定性分析法和叠加分析法对福建省2000-2017年MOD13Q1NDVI数据集、三种主要土地类型和DEM数据进行处理并分析.[结果/结论]结果表明:2000-2017年福建省年均NDVI和各季节NDVI呈稳定增长趋势, 植被轻微改善面积与显著改善的面积超过总面积的70.00％;近18年福建省草地、耕地、林地3种土地类型NDVI值在年际变化上均呈现出改善的趋势, 其中, 林地和草地改善面积超过各自土地类型面积的70.00％, 增加趋势明显;近18年福建省植被变异系数小于5.00％的面积比例为59.09％, 植被稳定性较高;福建省植被NDVI随高程的上升而增加, 增长速度随海拔高度的上升呈现先增加后放缓的趋势.%[Objective/Meaning]Through the analysis of the characteristics of NDVI in Fujian Province from 2000 to2017, the changing trends of vegetation coverage in Fujian were studied from the macro perspective.[Methods/Proce-dures]Using ArcGIS and Excel software, the MOD13 Q1 NDVI data set, NDVI of three main land types and DEM da-ta of Fujian Province from 2000 to 2017 were processed and analyzed by trend line, stability and superposition analy-sis.[Results/Conclusions]The annual and seasonal NDVI of Fujian showed steady growth from 2000 to 2017, andthe area of vegetation slightly or significantly improved was over 70.00％ of the total area;The NDVI of grassland, cultivated land and forest land in Fujian Province were improved in the interannual variation in the past 18 years.A-mong them, the improved area of forest land and grassland exceeded 70.00％of the corresponding land type area withsignificant increasing trend;The vegetation area with NDVI variation coefficient less than 5.00％in Fujian Provincewas 59.09％in recent 18 years, indicating high stability;The NDVI of Fujian increased with the elevation, and thegrowth rate increased firstly and then slowed down with the increase of elevation.