卫星遥感监测近地表细颗粒物多元回归方法研究

被引:21
作者
贾松林 [1 ,2 ]
苏林 [1 ]
陶金花 [1 ]
王子峰 [1 ]
陈良富 [1 ]
尚华哲 [1 ,2 ]
机构
[1] 中国科学院遥感与数字地球研究所遥感科学国家重点实验室
[2] 中国科学院大学
关键词
近地表细颗粒物浓度(PM2.5); 卫星遥感监测; 多元回归模型; 气象要素; 气溶胶光学厚度(AOD);
D O I
暂无
中图分类号
X87 [环境遥感];
学科分类号
1404 ;
摘要
对地基监测PM2.5和气象数据、MODISAOD卫星数据与NCEP FNL数据进行了处理分析,在与一元简单线性模型(模型1)进行对比的基础上,建立了适应于北京及其附近地区遥感监测近地面颗粒物(PM2.5)浓度的多元线性(模型2)和非线性(模型3)回归模型,并对模型进行了评价验证和遥感监测初步应用.结果表明:模型1,2,3分别能够解释PM2.5 32.5%,56.1%,62.7%的变异.反演的PM2.5浓度与站点监测值相关性分别为0.5488(R2=0.3012),0.7449(R2=0.5549),0.7431(R2=0.5523).对于站点监测PM2.5浓度63.1652μg/m3的均值,反演均方根误差RMSE分别为43.5562,35.3321,36.8450μg/m3.模型2和3中气象因子分别能够解释PM2.5 23.6%和12.6%的变异,说明了气象因子影响北京地区春季PM2.5-AOD关系的显著性.3种模型整体上都不同程度地存在着低值高估和高值低估的现象.
引用
收藏
页码:565 / 573
页数:9
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