基于长时间序列的皖北地区NDVI空间分布及季节变化研究  

A Study on the Spatial Distribution and Seasonal Changes of NDVI in Northern Anhui Based on Long Time Series

作　　者：钱兆 孙汝甲 林啸啸 Qian Zhao;Sun Rujia;Lin Xiaoxiao

机构地区：[1]宿州学院管理学院,安徽宿州234000

出　　处：《滁州学院学报》2024年第5期9-16,23,共9页Journal of Chuzhou University

基　　金：宿州学院科研项目“应对气候变化的宿州市农业高质量发展研究(2022ykf37)”;宿州学院科研项目“皖北大运河文化带区域经济空间结构演变与影响因素研究(2022ykf13)”。

摘　　要：皖北地区作为重要的粮食基地,监测其在快速城市化背景下的植被动态变化对城市群的可持续发展有着重要意义。利用2000—2020年长时间序列的MODIS-NDVI数据,系统分析了2000—2020年皖北地区全年及季节的植被空间分布及变化趋势。结果表明,皖北地区NDVI空间重心有着夏季-秋季-春季-冬季的变化轨迹,逐步向北偏移,南部植被相较于北部对季节更替具有更为敏感的响应;在时间序列分析上,NDVI的月均值有着显著的双峰特征,峰值分别出现在4月及7至8月,而低谷则集中于11月至次年1月;年度变化趋势上,69.9%像元的植被覆盖情况展现出改善的趋势,NDVI空间重心向东偏移1.4km;季节变化上,春季、秋季和冬季呈现显著增长的趋势,夏季变化不显著,淮南市与其他各市存在着较大的差异。研究结果可为皖北地区乃至更广泛区域的生态环境建设与管理提供建议,促进区域生态环境的可持续发展。As an important grain base,monitoring the dynamic changes of vegetation in northern Anhui region in the context of rapid urbanisation is of great significance for the sustainable development of the urban agglomeration.The spatial distribution and change trend of vegetation cover in northern Anhui region throughout the year and seasons were systematically analysed for 21 years using long time series of MODIS-NDVI data from 2000 to 2020.The results showed that the spatial centre of gravity of NDVI in northern Anhui had a trajectory from summer to autumn,then to spring,and finally to winter,and gradually shifted to the north,and the vegetation in the south had a more sensitive response to seasonal changes than that in the north;in the time-series analysis,the monthly mean values of NDVI had a significant bimodal characteristic,with peaks occurring in April and July-August,and valleys focusing on the period from November to January of the following year;In terms of the annual trend,69.9% of the vegetation cover of the like yuan showed an improving trend,and the spatial centre of gravity of NDVI shifted eastward by 1.4 km;in terms of the seasonal change,the spring,autumn and winter showed a significant increasing trend,and the change in the summer was insignificant,with a large difference between Huainan City and other cities.The results of the study can provide for the ecological environment construction and management in northern Anhui and even the wider region,and promote the sustainable development of the regional ecological environment.

关 键 词：NDVI 植被覆盖 皖北 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]