基于MODIS数据的蒙山2001—2016年植被动态变化研究  

Vegetation Changes in the Meng Mountain Region from 2001 to 2016 Based on MODIS Data

作　　者：丁少文 陈亦妍 谭丽荣 赵兴云[1] 郭媛媛[1] Ding Shaowen;Chen Yiyan;Tan Lirong;Zhao Xingyun;Guo Yuanyuan(Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection,College of Resources and Environment,Linyi University,Linyi Shandong 27600)

机构地区：[1]山东省水土保持与环境保育重点实验室临沂大学资源环境学院,山东临沂276005

出　　处：《首都师范大学学报（自然科学版）》2018年第4期81-87,共7页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金青年基金(41701220);国家自然科学基金(41541020);博士科研启动基金(LYDX2016BS034)

摘　　要：基于不同波段影像构建的植被指数能够很好的反映植被的光合作用活动和生产力.以蒙山地区为研究区,本文利用250 m空间分辨率、8天合成MODIS地面反射率产品(MOD09Q1)计算了2001—2016年NDVI与植被近红外反射率指数(NIRv),并进行对比分析,在此基础上利用线性回归分析方法研究了近16年来蒙山植被覆盖时空动态变化.结果表明:⑴蒙山地区NDVI、NIRv的年内变化具有很好的一致性,在生长季数值较高而非生长季数值相对较低,并且在非生长季NIRv的波动要比NDVI的波动要小;(2)在年内变化上,NDVI和NIRv均表现出明显的季节性,两个指数均在8月份达到峰值;(3)从2001—2016年,NDVI、NIRv值整体呈上升趋势,且东南部上升趋势更明显.本研究客观揭示了区域植被的时空变化趋势,可为该区生态环境保护和治理提供参考.Vegetation index,which is often calculated from bands with different width,can better reflect vegetation photosynthetic activity and productivity. We analyzed 8-day MODIS surface reflectance product（ MOD09 Q1） at250 m spatial resolution in the Meng Mountain region,and calculated Normalized Difference Vegetation Index（ NDVI） and the Near Infrared Reflectance of terrestrial Vegetation（ NIRv） from 2001 to 2016. We made a comparison of the two indices,and investigated the spatial and temporal changes in vegetation using the linear regression method. The results showed that intra-annual variabilities of NDVI and NIRv were consistent,with relatively higher value in growing season and lower values in non-growing season. Furthermore,NIRv often fluctuated with smaller magnitude in the non-growing season. Regarding intra-annual variability,NDVI and NIRv showed pronounced seasonality with peak value occurring in August. From 2001 to 2016,NDVI and NIRv showed an increasing trend,especially in the southeast of Meng Mountain region. Our research revealed the spatial and temporal patterns of vegetation change,which could provide scientific evidence for eco-environmental protection and governance.

关 键 词：NDVI NIRv MODIS 植被动态变化 

分 类 号：Q948[生物学—植物学]