项目名称: 基于拉曼测量大气要素的差分吸收CO2探测激光雷达数据修正方法研究
项目编号: No.41301372
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 张金业
作者单位: 湖北工业大学
项目金额: 25万元
中文摘要: 大气中CO2浓度空间分布及其变化是目前人们最为关心的问题之一。针对目前公认可获得CO2浓度三维分布的最佳遥感探测手段--差分吸收CO2激光雷达,其探测反演精度受大气气压、温度、水汽和气溶胶等因素影响很大的问题,本项目提出采用同步多通道拉曼激光雷达探测上述大气参量,开展它们对CO2吸收谱线影响以及提高CO2浓度反演精度的修正算法研究。项目实施中,将研究压强、温度对CO2超精细吸收谱线位置、线型、半宽度及线强的影响,分析其中的依赖关系,研究消除影响的修正方法。基于拉曼激光雷达的实时同步探测,修正压强和温度变化对CO2吸收谱线的改变,扣除水汽和气溶胶的消光作用。两台激光雷达以相同的时间和空间分辨率同步探测,具有其他手段无法比拟的优势,将可获得最高时空分辨大气CO2浓度数据集。通过本项目研究,可望得到1ppm精度的大气CO2浓度垂直分布廓线,为碳排放研究控制提供数据支撑。
中文关键词: 拉曼;激光雷达;水汽;气溶胶;二氧化碳
英文摘要: The concentration and the development of the greenhouse gas CO2 in the atmosphere is one of the most concern of the human. The differential absorption lidar is the best remote sensing means of detecting CO2. But the detection is susceptible to atmospheric pressure,temperature, water vapor and aerosols. We put forward that making use of simultaneous multi-channel Raman lidar to detect these atmospheric parameters, and to study their interferences and find the correction method. In the project, the interferences of pressure and temperature to the CO2 absorption line's positon, the shape, half-width and the intensity, as well as the correction method to improve the CO2 concentration retrieval accuracy, will be researched. The change of the CO2 absorption line due to the pressure and temperature will be corrected, and the extinction of water vapor and aerosols will be removed based on Raman lidar's real time and synchronous detection. The synchronous lidars have the same temporal and spatial resolution, and have absolute advantages that the other means don't have. They will obtain the CO2 concentration data with the highest temporal and spatial resolution. The one ppm accuracy's detection of the vertical distribution of atmospheric CO2 concentration will be expected, and it will provide reliable data to research
英文关键词: Raman;lidar;water vapor;aerosol;CO2