1999—2013年中国东北植被物候信息遥感监测

发布时间：2018-05-26 21:45

本文选题：变异函数 + 植被生长季　；参考：《自然资源学报》2017年02期

【摘要】：随着3S技术的迅猛发展,用于地表遥感监测的卫星影像数据浩如烟海,而影像上地表植被长势等隐含信息的提取通常工作量大、耗费时间。论文提出了一种计算机自动提取地表植被物候信息的方法,主要用于对地表植被生长季及其年内长势进行快速提取。方法的基本原理是基于NDVI序列数据集,构建时间点对的时长跨度与该点对半方差的函数关系。选择东北松嫩平原地区作为重点试验区,计算了该区域1999—2013年地表植被生长季长度和长势特点,并选择东北地区物候观测数据进行验证分析。结果表明:1)东北地区农耕作物的生长季持续期在107~126 d左右。计算得到的结果与实测数据的最大误差在5 d值域范围内,沼泽植被在160 d以上(误差10 d左右),草地为120~139 d;2)研究区地表植被的生长盛期峰值出现在第150天前后。结果较为真实、合理地反映了研究区域地表植被的物候信息。
[Abstract]:With the rapid development of 3s technology, the satellite image data used for surface remote sensing monitoring are huge. However, the extraction of hidden information such as vegetation growth on the image usually takes a lot of work and time consuming. In this paper, a computer automatic method for extracting phenological information of surface vegetation is proposed, which is mainly used for rapid extraction of vegetation growth season and its annual growth. The basic principle of the method is to construct the functional relationship between the time span of the time point pair and the semi-variance of the point pair based on the NDVI sequence data set. This paper selected Songnen Plain in Northeast China as the key experimental area, calculated the length and characteristics of surface vegetation growth season from 1999 to 2013, and selected the phenological observation data of Northeast China for verification and analysis. The results showed that the growing season duration of farming crops in Northeast China was about 107126d. The maximum error between the calculated results and the measured data is within the range of 5 days, and the peak value of the growth peak of surface vegetation in the study area is about 150 days. The maximum value of the vegetation is above 160 days (the error is about 10 days, and the grassland is 120 ~ 139 d ~ (2). The results show that the phenological information of surface vegetation in the study area is more realistic and reasonable.
【作者单位】：吉林大学地球探测科学与技术学院;白城师范学院;沈阳农业大学农学院;
【基金】：吉林省科技厅自然科学基金面上项目(20140101211JC) 中国地质调查局项目(12120115063701)~~
【分类号】：Q948;TP79

【相似文献】