近20年荆州市归一化植被指数时空演变特征及其对空气质量的影响  

Spatio-temporal Evolution Characteristics of Vegetation NDVI and Its Effect on Air Quality in Jingzhou City in Recent 20 Years

作　　者：王彤新 李莎 左婵 郭晓华[1] 张庭康 张秀娟[1] Wang Tongxin;Li Sha;Zuo Chan;Guo Xiaohua;Zhang Tingkang;Zhang Xiujuan(College of Horticulture and Gardening,Yangtze University,Jingzhou 434000,Hubei,China;School of Geosciences and Info-physics,Central South University,Changsha 410083,China;Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]长江大学园艺园林学院,湖北荆州434000 [2]中南大学地球科学与信息物理学院,长沙410083 [3]中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京100101

出　　处：《中国城市林业》2023年第6期106-112,共7页Journal of Chinese Urban Forestry

基　　金：国家自然科学基金青年项目(51908063)。

摘　　要：定量评估植被时空变化与空气质量的关系有利于预测区域生态系统健康。文章基于MOD13A3 NDVI数据和空气质量数据,采用最大值合成、一元回归分析与相关性分析,探讨2000—2019年荆州市植被NDVI时空演变特征与空气质量的关系。结果表明:1)2000—2019年荆州市植被变化范围是0.431~0.474,以每年0.215%的变化率逐年增加,其中2000—2009年的NDVI增长趋势高于2010—2019年,较高植被覆盖度主要分布在中部和西部地区,东部地区以较低植被覆盖度为主,空间上呈现“西高东低”的分异特征。2)植被覆盖能有效调控城市空气质量,PM_(10)、NO_(2)与NDVI极显著负相关(P<0.01),PM_(2.5)、CO与NDVI显著负相关(P<0.05),显著性指数排名为PM_(10)(0.992)>NO_(2)(0.963)>PM_(2.5)(0.953)>CO(0.880)。因此,增加植被覆盖、构建完善城市绿网始终是城市生态环境建设的重要方向。The quantitative assessment of the relationship between spatio-temporal changes of vegetation and air quality helps predict regional ecosystem health.With the data on MOD13A3 NDVI and air quality,the papery explores the relationship between spatio-temporal evolution characteristics of vegetation NDVI and air quality in Jingzhou City from 2000 to 2019 using the maximum value synthesis,one-way regression analysis and correlation analysis.The results show:1)The vegetation NDVI in Jingzhou City from 2000 to 2019 falls in the range of 0.431-0.474,increasing at a rate of 0.215%·a^(-1) from year to year,while the NDVI growth in 2000-2009 is higher than that in 2010-2019.The central region and western regions have higher vegetation cover,whereas the eastern region has lower vegetation cover,presenting a spatial differentiation feature of"high in the west and low in the east";and 2)Vegetation cover can effectively regulate the urban air quality.PM_(10) and NO_(2) are highly significantly negatively correlated with NDVI(P<0.01),and PM_(2.5) and CO are significantly negatively correlated with NDVI(P<0.05).The significance indices are ranked as PM_(10)>NO_(2)>PM_(2.5)>CO.It is concluded that the increase of vegetation cover significantly improves the air quality,and increasing vegetation to build a sound urban green network has always been an important direction of improving urban ecological environment.

关 键 词：归一化植被指数(NDVI) 空气质量 相关性分析 荆州市 

分 类 号：Q948[生物学—植物学]