摘要
为了探究植被NDVI变化特征及其对温度和降雨变化的响应,以安徽省为例,基于2013~2019年安徽省长时序MODIS-NDVI数据,分析了近7年安徽省NDVI的时空变化特征及其演变规律,同时结合不同降水和温度下NDVI变化特征进行了相关性分析。结果表明:安徽省7年间NDVI值在0.57至0.64之间,其与平均气温和年降雨呈正相关关系,且NDVI值与年降雨呈显著正相关的面积比例要大于与平均气温呈显著相关性的面积比例,空间分布存在明显差异。安徽省7年间NDVI值总体呈现增长趋势(R^(2)=0.6178),增长速率为0.00387,夏季NDVI均值最高,植被覆盖度越来越优。皖西和皖南山区NDVI值较高,而江淮丘陵区NDVI值较低,主要与该地区人类活动频繁,植被破坏严重有关。
In order to explore the change characteristics of NDVI and its response to the changes of temperature and rainfall,Anhui Province was taken as an example.This paper,based on the long-time-series MODIS-NDVI data of Anhui Province from 2013 to 2019,analyzes the temporal and spatial characteristics of NDVI and its evolutionary law in Anhui Province in the past 7 years,with the correlation analysis of the characteristics of NDVI changes under different precipitation and temperature.The results showed that the NDVI value of Anhui Province in the past 7 years was between 0.57 and 0.64,correlated with the average temperature and annual rainfall,and the proportion of the area with a significant positive correlation between the NDVI value and the annual rainfall was greater than that of the significant correlation with the average temperature.There were obvious differences in area ratio and spatial distribution.The NDVI value of Anhui Province showed an overall increasing trend(R^(2)=0.6178)in the past 7 years,the growth rate was 0.00387,the average NDVI value in summer the highest,and the vegetation coverage getting better and better.The NDVI value was higher in the mountainous areas of western and southern Anhui,while the NDVI value of the Jianghuai hilly area lower,which was mainly related to the frequent human activities and serious vegetation destruction in this area.
作者
顾昕
杨洁
高良敏
陈晓晴
GU Xin;YANG Jie;GAO Liangmin;CHEN Xiaoqing(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China)
出处
《安徽理工大学学报（自然科学版）》
CAS
2021年第3期34-40,共7页
Journal of Anhui University of Science and Technology:Natural Science
基金
安徽省重点研究与开发计划项目生态环境专项基金资助项目(202004i07020012)。
关键词
NDVI
时空变化
趋势分析
相关性分析
NDVI
trend analysis
temporal and spatial variation
correlation analysis
