题名: NN Analysis of Sensitivity of the Parameters on Carbon Dioxide Retrieval Using High-Resolution Solar Absorption Spectra
作者: Shan Chang-gong1; Liu Cheng2; Wang Wei3; Yang Wei3; Sun You-wen3; Liu Wen-qing3; Tian Yuan3
刊名: SPECTROSCOPY AND SPECTRAL ANALYSIS
出版日期: 2017-07-01
卷号: 37, 期号:7, 页码:1997-2003
关键词: A model parameter ; Fourier transform Infrared spectroscopy ; Analysis of sensitivity ; Carbon dioxide
英文摘要: Solar absorption spectra collected with a high-resolution Fourier transform spectrometer is able to measure the column abundance of CO2 accurately. In the paper, the influence of a model parameters in the forward model on the retrieval of CO2 is analyzed, also the impact of a model parameters on retrieval results under different solar zenith angle and the reasons are discussed. Four model parameters, such as continuum tilt value, internal field of view, zero-level offset and Doppler shift are modified in the forward model and how the results change with the disturbance is studied, based on the spectra collected in two typical days. The results show that, the relative deviations of column-averaged dry air mole fraction of CO2 (XCO2) caused by the disturbance of different a model parameters are different. Also, the relative deviations due to the disturbance of the same parameters corresponding to different time for collecting spectra are different. Continuum tilt value has the biggest influence on the retrieval, and the change of this value resulted in the relative deviations of XCO2 between 0. 1%similar to 0. 2%. The changes of other three parameters internal field of view, zero-level offset and Doppler shift have small impact on the retrieval, which leads to the relative deviations of XCO2 in the range of -0. 045%similar to-0. 02%, -0. 045%similar to 0. 015% and -0. 03%similar to 0. 04%, respectively. Finally, the reasons of the deviations are explained based on the average kernels of CO2. The results provide a basis for how to set the parameters in the retrieval algorithms and improve the measurement accuracy of atmospheric CO2.
WOS标题词: Science & Technology ; Technology
类目[WOS]: Spectroscopy
研究领域[WOS]: Spectroscopy
关键词[WOS]: COLUMN OBSERVING NETWORK ; CO2 ; CALIBRATION
收录类别: SCI
语种: 英语
WOS记录号: WOS:000405648400002
Citation statistics:
内容类型: 期刊论文
URI标识: [http://ir.hfcas.ac.cn:8080/handle/334002/33539]  
Appears in Collections:合肥物质科学研究院_中科院安徽光学精密机械研究所


作者单位: 1.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230031, Peoples R China
3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China
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