APP下载

基于遥感的植被物候学方法研究

2015-10-21李娜

安徽农业科学 2015年5期

摘要植物物候现象能够直观、综合地反映环境条件季节、年际变化及陆地生态系统短期变化的特征。基于遥感监测方法的植物物候研究已成为全球气候变化研究的一个热点课题。该研究基于植物光谱特征分析的原理,分别介绍了动态阈值法、滑动平均法、求导法、曲线拟合法和主分量分析法等幾种常见的植物物候遥感监测方法,并分别从植物物候与气候关系、植物物候与净初级生产量、植物物候与城市热岛、植物物候与土地覆盖、植物物候与农作物估产等方面综述了研究植物物候的主要应用,总结出植物物候的变化常常是气候和人类二者共同影响的结果。最后针对目前研究中存在的问题,对今后研究的主要方向作出了展望。

关键词遥感;物候;NDVI;气候;人类活动

中图分类号S126文献标识码

A文章编号0517-6611(2015)05-318-02

Study on the Method of Vegetation Phenology Based on Remote Sensing

LI Na(Liangshan Meteorological Administration,Jining,Shandong 272600)

Abstract Plant phenological phenomenon can be intuitive,comprehensively reflect the environmental conditions and seasonal,interannual variability and the features of short-term changes in terrestrial ecosystems.Plant phenology research based on remote sensing monitoring method has become a hotspot in the research of the global climate change.Based on the principle of plant spectrum characteristics analysis,the dynamic threshold method,moving average method,derivative method,curve fitting method and principal component analysis method and so on were introduced,and respectively from the relationship between plant phenology and climate,plant phenology and net primary production,plant phenology and urban heat island,plant phenology and land cover,plant phenology and crop yield estimation and so on,the main application research of plant phenology were reviewed,the changes of plant phenology often is the result of climate and human influence each other.Finally aiming at the problems existing in the research,the main directions of future research were forecasted.

Key words Remote sensing monitoring; Phonological; NDVI; Climate; Human activities

作者简介李娜(1989- ),女,陕西延长人,助理工程师,从事气象研究。

收稿日期2014-12-26

物候学是研究自然界植物和动物的季节性现象同环境的周期性变化之间的相互关系的科学,植被物候研究能够认识植物自然季节现象变化规律、分析其受气候变化或人为干扰等因素的影响。传统的物候学研究方法以野外观测为基础,简单易行,但耗费大量的人力物力,周期短,覆盖面小[1]。近年来,随着遥感技术和电子计算机的飞速发展,植被物候观测手段也取得了明显的进步。利用长时间序列的卫星数据获取的地表植被物候信息,与地面实测物候资料相结合,对全球和区域尺度植物物候变化进行研究。……

登录APP查看全文