| 摘要: |
| 对卫星遥感监测大气NO2的差分算法涉及的科学问题进行了综述，包括去除大气散射和地表反射噪声影响、大气拉曼散射引起的Ring效应校正、不同大气成分分离和观测垂直归一化等问题。国际上通过剔除平流层NO2获得对流层柱浓度产品，文章绕开平流层NO2获取问题，提出了结合大气化学模式模拟的垂直廓线直接估算近地面NO2浓度技术方法，以更好地满足环境空气质量的观测需求，阐述了几个影响NO2反演精度的相关问题。 |
| 关键词: 二氧化氮 柱浓度 拉曼散射 大气质量因子 差分吸收光谱算法 |
| DOI： |
| 分类号:X87 |
| 基金项目:八六三计划基金资助项目（2014AA06A500） |
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| ScientificProblems for Ground NO2Concentration Estimation Using DOAS Method from Satellite Observation |
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CHEN Liangfu， GU Jianbing， WANG Tiantian， TAO Jinghua， YU Chao1,2,3,4
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1. Institute of Remote Sensing and Digital Earth， Chinese Academy of Sciences， State Key Laboratory of Remote Sensing Science， Beijing 100101，China;2. University of Chinese Academy of Sciences， Beijing 100049， China;3. Jiangsu Environmental Monitoring Center，Nanjing，Jiangsu 210036 ，China;4. Tsinghua University，Beijing 100084， China
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| Abstract: |
| This paper presented some scientific problems existed in ground NO2concentration retrieved from satellite observations using differential optical absorption spectroscopy （DOAS），including the noises caused by atmospheric aerosol scattering and land surface reflection， Ring effects resulted from atmospheric Raman scattering， separation method of different trace gases from the measurements and vertical normalization of NO2inclined column density etc. Generally， the NO2tropospheric vertical column density is the final product from satellite measurements for users over the world， but the ground NO2concentration is the most concerned by air quality monitoring and public health， so in this manuscript we put forward the ground NO2concentration estimation based on the combination of vertical profiles of NO2concentration from RAMS CMAQ modeling and vertical column density from satellite. Finally， some other scientific issues affecting the NO2concentration inversed from space measurements are presented. |
| Key words: NO2 Vertical column density Raman scattering AMF DOAS |
