大气温度、湿度和压强对星载激光雷达测量CO<sub>2</sub>浓度精度的影响

谢杨易; 刘继桥; 姜佳欣; 陈卫标

doi:doi:10.3788/cjl201239.s214005

中国激光, 2012, 39 (s2): s214005, 网络出版: 2013-01-05

大气温度、湿度和压强对星载激光雷达测量CO₂浓度精度的影响

Effects of Atmosphere Temperature, Humidity and Pressure for a Space-Borne Lidar Measuring Atmosphere CO₂ Concentrations

论文大纲

谢杨易 ^1,2,*刘继桥 ¹姜佳欣 ^1,2陈卫标 ¹

作者单位

¹ 中国科学院上海光学精密机械研究所，上海市全固态激光与应用重点实验室，上海 201800

² 中国科学院大学，北京 100049

摘要

研究了大气温度、湿度和压强的不确定性对于星载积分路径差分吸收(IPDA)激光雷达系统测量大气CO2柱线浓度精度的影响。介绍了测量大气CO2柱线浓度的基本原理和CO2吸收截面计算方法，理论分析并模拟计算了吸收峰(On-line)波段范围不同大气温度、湿度和压强的误差对于大气CO2柱线浓度反演精度的影响。对于给出的优化工作波长，在吸收峰波数为6361.2250 cm-1，吸收谷(Off-line)波数为6360.99 cm-1，温度不确定性为1 K、湿度不确定性为10%以及压强不确定性为0.001的条件下，综合导致的CO2柱线浓度测量误差为0.296×10-6，为高精度反演大气CO2柱线浓度提供了重要参考数据。

Abstract

The influences of atmospheric temperature, humidity and pressure uncertainties on space-borne integrated path differential absorption (IPDA) lidar measuring atmospheric column-averaged CO2 concentrations are studied. The column-averaged CO2 concentrations measurement principle and CO2 absorption cross section calculation method are presented. The influences of atmospheric temperature, humidity and pressure errors on retrieving CO2 concentrations around on-line CO2 absorption line are analyzed and simulations are implemented. For optimal IPDA lidar on-line and off-line wave number of 6361.2250 cm-1 and 6360.99 cm-1, the total column-averaged CO2 concentration measurement error is calculated to be 0.296×10-6 with temperature error of 1 K, humidity error of 10% and relative pressure error of 0.001. The result is important for retrieval of column-averaged CO2 concentration with high precision and lidar system parameters optimization.

参考文献

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谢杨易, 刘继桥, 姜佳欣, 陈卫标. 大气温度、湿度和压强对星载激光雷达测量CO₂浓度精度的影响[J]. 中国激光, 2012, 39(s2): s214005. Xie Yangyi, Liu Jiqiao, Jiang Jiaxin, Chen Weibiao. Effects of Atmosphere Temperature, Humidity and Pressure for a Space-Borne Lidar Measuring Atmosphere CO₂ Concentrations[J]. Chinese Journal of Lasers, 2012, 39(s2): s214005.

大气温度、湿度和压强对星载激光雷达测量CO₂浓度精度的影响

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