摘要
基于MODIS-NDVI数据和气象数据,研究了天津市蓟州区植被NDVI近16年的时空变化特征以及16年间气温、降水变化规律。研究结果表明,蓟州区2000—2015年年平均NDVI趋势为先降后升,最低值出现在2004年。月际NDVI均值与月平均降水量的相关性高于最大降水量的相关性,说明最低温度比最高温对植被的影响更大,月平均降水量比最大降水量对植被的影响更大。除去人类活动的影响,蓟州区县植被指数的变化主要归因于降水减少和温度增加,对于指导当地生产实践具有实际意义。
Based on MODIS-NDVI data and meteorological data,the spatiotemporal change characteristics of vegetation NDVI and the change law of temperature and precipitation in Jizhou district of Tianjin in recent 16 years were studied.The results show that the annual average NDVI trend of Jizhou district from 2000 to 2015 is first decreasing and then increasing,and the lowest value appears in 2004.The correlation between monthly NDVI mean and monthly average precipitation is higher than that of maximal precipitation,which indicates that the minimal temperature has a greater impact on vegetation than the maximal temperature,and the monthly average precipitation has a greater impact on vegetation than the maximal precipitation.Besides the influence of human activities,the change of vegetation index in Jizhou district is mainly attributed to the decrease of precipitation and the increase of temperature,which is of practical significance for guiding local production practice.
作者
王秋成
杨公羽
李勃燃
WANG Qiucheng;YANG Gongyu;LI Boran(Academy of Prospecting of Tianjin,Tianjin 300110,China)
出处
《测绘与空间地理信息》
2021年第3期154-156,共3页
Geomatics & Spatial Information Technology
