摘要
使用便携式地基傅里叶变换红外光谱仪(EM27/SUN)对合肥地区N_(2)O的柱浓度开展了观测与反演研究,分析评估优选了N_(2)O的吸收谱段,结合最优估算法反演N_(2)O的柱浓度,并与TCCON观测网高分辨率傅里叶变换光谱仪的反演结果进行了对比。结果表明,在六个月内晴空条件下观测的XN_(2)O在311.76~334.92 ppb之间,均值为323.26 ppb。对比分析与TCCON相同观测天的数据,两者观测的XN_(2)O变化范围分别为319.11~325.37 ppb和322.40~329.29 ppb,一致性较好。与TCCON站点反演结果相比,EM27/SUN光谱仪的反演结果略低,XN_(2)O总体误差为0.84~7.88 ppb,相对误差范围0.26%~2.41%。利用推导的校正因子对反演后的结果进行了后处理,误差降低到-0.90%~1.36%。
Nitrous oxide(N_(2)O)is an important anthropogenic greenhouse gas(GHG)in the atmosphere,except for carbon dioxide(CO2)and methane(CH4).There are 75%of N_(2)O sources come from agricultural activities,and the rest is mainly caused by the decomposition of fossil fuel.However,large amounts of N_(2)O will accelerate the greenhouse effect.Because N_(2)O absorbs ultraviolet radiation(wavelength shorter than 315 nm)and photolysis to NO,which will lead to the destruction of the ozone layer.For decades,the global greenhouse potential of N_(2)O is approximately 300 times higher than CO2,thereby causing the significant warming effect on global climate.According to statistics,the globally averaged mole fraction of N_(2)O in the atmosphere was 333.2 ppb(parts per billion by volume)in 2020,representing a 1.2 ppb increase compared to 2019.Ground-based Fourier Transform Infrared(FTIR)spectrometer is an ideal gas concentration detection method with high accuracy,continuous measurement and high sensitivity to ground sources.The Total Carbon Column Observing Network(TCCON)is a ground-based network of Fourier transform spectrometers(FTSs).It was established in 2004 and focused on the accurate measurement of GHG column abundance,through the near-infrared(NIR)solar absorption spectroscopy.The scientific objective of the network is to provide a reference between satellite measurements and the ground-based in situ networks,which can provide the long-term global distribution of N_(2)O mole fractions.All TCCON sites adopt the high-resolution“Bruker OpticsTMIR FT spectrometer(IFS)125HR”which has high accuracy and excellent performance for GHG detection with a resolution of 0.00096 cm^(-1).Due to the relatively high cost of IFS 125HR and the lack of infrastructure and strict network requirements,observations are significantly limited.Compared with the IFS 125HR,the compact and portable GHG observation equipment EM27/SUN spectrometer is a flexible supplement.The EM27/SUN was developed jointly by KIT and Bruker,which has been commercially
作者
潘文雪
黄印博
刘丹丹
黄俊
张雷雷
李建玉
卢兴吉
曹振松
PAN Wenxue;HUANG Yinbo;LIU Dandan;HUANG Jun;ZHANG Leilei;LI Jianyu;LU Xingji;CAO Zhensong(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China;College of Electrical and Optoelectronic Engineering,West Anhui University,Lu'an,237012,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2023年第3期207-219,共13页
Acta Photonica Sinica
基金
国家自然科学基金(No.42027804)。
