摘要
采用大气校正法反演研究区地表温度,用地表温度数据分别与经度、纬度、海拔、坡向、坡度进行相关、回归分析,研究地表温度空间分布特征。以2014年7月的2景Landsat8影像为数据源,以甘肃石羊河流域上游为研究对象,应用大气校正法反演了研究区地表温度。结果表明,研究区地表温度在-5.23~50.77℃之间,60.94%区域的地表温度集中在20~30℃之间;研究区地表温度随海拔的升高而降低,呈线性负相关,相关极显著;地表温度随纬度的增大而升高,呈线性正相关,相关极显著;地表温度随坡向的变化呈周期性变化趋势,呈多项式相关,相关极显著;地表温度随经度的增大而降低,相关不显著;地表温度随坡度的增大而降低,线性相关不显著。
In order to study the spatial distribution characteristics of land surface temperatures, we usual- ly study the land surface temperature by method of atmospheric correction, and make correlation and re- gression analysis based on the land surface temperature data with longitude, latitude, altitude, aspect, and gradient respectively. Taking 2 Landsat 8 images of July 2014 as the data resource, the upper Shiy- ang river basin of Gansu as the research object, surface temperatures were displayed by the method of at- mospheric correction. The results showed that land surface temperatures in the research area ranged from - 5.23 to 50.77, among which land surface temperatures of 60.94% areas were between 20 and 30 de- grees ; the land surface temperature decreased with the increase of altitude, presenting the remarkable lin- ear negative correlation, heightened with the increase of latitude, presenting the remarkable linear posi- tive correlation, showed periodic variation trend with the change of aspect, markedly presenting the poly- nomial correlation, decreased with the increase of longitude, inapparently presenting the correlation; and decreased with the increase of gradient, indistinctively presenting the linear correlation.
出处
《林业调查规划》
2017年第3期17-21,共5页
Forest Inventory and Planning
基金
2015甘肃省林业科技项目(项目编号:2015kj043)
关键词
大气校正法
地表温度
反演
空间分布特征
环境因子
甘肃石羊河流域
atmospheric correction
land surface temperatures
inversion
spatial distribution character- istics
environmental factors
Shiyang river basin of Gansu
