摘要
从大气辐射传输模型正演和反演两个角度,探究CO2观测时地表高程的敏感性。SRTM地表高程数据表明,在北京附近的平原地区,卫星指向不准导致的地表高程均值的误差较小,在偏移量为0.1~10.0km的情况下,误差极大值约为10m;而在北京附近山区以及平原与山区交界区内,地表高程均值的误差较大,误差极大值分别为713.98,515.61m。CO2反演结果表明:高程值每变化100m,CO2柱浓度偏差为3.29×10^-6;在大气CO2高精度反演中,地表高程偏差是一个关键因素。
The influence of surface elevation on atmospheric CO2 observations is explored from the perspective of forward and inversion of the atmospheric radiation transfer model in this work. The surface elevation data from the shuttle radar topography mission (SRTM) show that the error of the mean surface elevation due to inaccurate satellite pointing in the plains near Beijing is small, with a maximum error of approximately 10 m for a pointing offset of 0.1-10 km. However, in the mountainous areas and in the boundaries between mountainous areas and plains, the error of the mean surface elevation is large, with the maximum errors of 713.98 and 515.61 m, respectively. The CO2 inversion results show that for an elevation change of 100 m, the CO2 column density deviates by 3.29×10^-6. Thus, the research results show that the surface elevation deviation is a critical factor in performing atmospheric CO2 inversion with high precision.
作者
吕松
王先华
叶函函
蒋芸
吴浩
李勤勤
吴时超
Lu Song;Wang Xianhua;Ye Hanhan;Jiang Yun;Wu Hao;Li Qinqin;Wu Shichao(Key Laboratory of Optical Calibration and Characterization , Anhui. Institute of Optics and Fine Mechanics,Chinese Academy of Sciences , Hefei, Anhui 230031, China;University of Science and Technologiy of China ,Hefei, Anhui 230026, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第5期154-160,共7页
Acta Optica Sinica
基金
国家重点研发计划(2017YFB0504000,2017YFB0504001)
高分辨率对地观测系统重大专项(民用部分)(32-Y20A17-9001-15/17)
国家自然科学基金(41601393)
中国科学院合肥物质科学研究院“十三五”规划重点支持项目
关键词
测量
CO2
地表高程
SRTM
反演
正演
measurements
CO2
surface elevation
shuttle radar topography mission
inversion
forward
